PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
40 SERIES
BALL CONTROL VALVES
PRODUCT BULLETIN
HIGH PERFORMANCE BALL CONTROL VALVE:
intelligent field devices for efficient field based architecture
HEAVY TRUNNION DESIGN
SEVERE SERVICE
CAPABILITY
HIGH VERSATILITY
LOW NOISE AND CAVITATION
CONTROL
WITH RMT TRIMS
CUSTOMIZABLE
SOLUTIONS
1
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
RMT CONTROLS
a division of RMT VALVOMECCANICA – GIVA GROUP
Via dei Patrioti • 21058 Solbiate Olona (VA) Italy
Ph: +39 0331 375441 • Fax: +39 0331 376847
[email protected]
www.rmtvalvomeccanica.com
2
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
INDEX
1.
GENERAL FEATURES .............................................................................................................................................................. 5
2.
TECHNICAL DESCRIPTION ..................................................................................................................................................... 9
2.1
BODY/CLOSURE ............................................................................................................................................................... 11
2.2
BONNET ............................................................................................................................................................................ 11
2.3
PACKING........................................................................................................................................................................... 11
2.3.1
STANDARD LOW EMISSION PACKING .................................................................................................................. 11
2.3.2
LIVE LOADING LOW EMISSION PACKING............................................................................................................. 12
2.4
TRIM COMPONENTS ........................................................................................................................................................ 13
2.4.1
TRUNNION/STEM AND BEARINGS ........................................................................................................................ 13
2.4.2
SEAT RING AND BALL ELEMENT .......................................................................................................................... 14
2.4.2.1
SEAT RING CONFIGURATION ...................................................................................................................... 14
2.4.2.2
SEAT RING SEALING CONSTRUCTION ....................................................................................................... 14
2.4.2.3
BALL .............................................................................................................................................................. 15
2.4.2.4
MATERIAL OF CONSTRUCTION ................................................................................................................... 15
2.4.3
SEALING COMPONENTS (STATIC AND DYNAMIC)............................................................................................... 16
2.4.3.1
O RING SEALS ............................................................................................................................................... 16
2.4.3.2
LIPSEALS....................................................................................................................................................... 16
2.4.3.3
GRAPHITE PACKING AND SPIRAL WOUNDS .............................................................................................. 16
2.4.3.4
FIRE SAFE DESIGN ....................................................................................................................................... 16
2.5
RMT CONTROL TRIMS FOR 40 SERIES ........................................................................................................................... 17
2.5.1
45 SERIES: V CUT BALL CONTROL VALVE .......................................................................................................... 17
2.5.1.1
2.5.2
43 SERIES: MULTISTAGE BALL CONTROL VALVE............................................................................................... 19
2.5.2.1
: NOISE ABATEMENT .................................................................................................................................... 19
2.5.2.2
CAVITATION CONTROL ................................................................................................................................ 20
2.5.2.3
RMT 43 SERIES BALL CONTROL VALVES FOR CAVITATION AND NOISE CONTROL .............................. 21
2.5.3
2.6
3.
45 SERIES FOR EXTREME EROSIVE APPLICATIONS: 45SS....................................................................... 18
42 SERIES: BALL CONTROL FOR EXTREME NOISE CONTROL ........................................................................... 22
40 SERIES FLEX DESIGN FOR QUICK CHANGE AND EASY MAINTENANCE ................................................................ 23
ACTUATORS AND CONTROLLING DEVICES ....................................................................................................................... 24
3.1
ACTUATORS ..................................................................................................................................................................... 24
3.2
POSITIONERS AND PANELS ............................................................................................................................................ 24
4.
PRODUCT QUICK SPECIFICATION ...................................................................................................................................... 25
5.
40 SERIES RATING/CONNECTION TABLES ......................................................................................................................... 26
6.
MATERIAL SELECTION GUIDE ............................................................................................................................................. 27
7.
FLOW CHARACHTERISTICS ................................................................................................................................................. 29
REVISION
DESCRIPTION
PREPARED
APPROVED
DATE
A
FIRST ISSUE
MARCO FUSCA
MATTEO ROSSI
01/07/2015
3
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
4
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
1. GENERAL FEATURES
The 40 series is the RMT product line of trunnion mounted ball valve for control
application.
40 series control valve couple:
 the advantages of a ball valve design, typically applied for on/off service:
 excellent tightness
 high flow capability
 heavy duty construction, suitable for extreme severe pressure/temperature
combination
 the advantages of an engineered control trim:
 extremely high rangeability
 cavitation control capabilities
 noise abatement and sound emission control capabilities
 anti-clogging design for dirty and viscous fluid applications
Moreover 40 series ball control valve are designed to offer:
 quick change trim for easier maintenance operations even if they have a side entry
construction
 low torque design, for compact actuation with higher performance both in terms of
smooth control and quick positioning
 compact design with short end-to end dimensions of our flex® design.
You can use it in Oil & Gas as
 Upstream: onshore and offshore
 Midstream: transportation, filtering, reduction, metering, storage …
 Downstream: petrochemical, refineries, LNG …
 Distribution networks …
and also in many other industrial applications:
 Chemical applications
 Power
 Water: potable and desalination plants
 …
Everywhere you need a process control.
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PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
40 SERIES HAS THE AIM TO OFFER:

HIGH PERFORMANCE SOLUTIONS TO SUIT CUSTOMER REQUIREMENTS:
high tightness capabilities and high flow capacities;
design flexibility thanks to the wide range of trim option, actuation and instrumentations
solutions;
the goal to suit customer request at every process condition, even the most severe ones;

HIGH RELIABILITY:
solid design and attention to materials selection to provide wear resistance and long life
even in severe conditions;

COMPACT DESIGN:
design attention to reduce overall costs and offer easy handling and installation.
HIGH PERFORMANCE SOLUTIONS TO SUIT CUSTOMER
REQUIREMENTS

HIGH TIGHTNESS CAPABILITIES
 WIDE RANGE OF PACKING SOLUTIONS
40 series make possible to reach the higher classes
In order to satisfy any special requirement in
of tightness according to ISA standard, up to a zero
term of low emission, different suitable
leakage design typical of an on/off ball valve.

packing solutions are provided:
HIGH CAPACITY DESIGN
Ball
design
make
possible
to
maximize
flow
capacity.


Low emission packing (LEM)

Live loading low emission packing (LL-LEM)
Have a look to packing section.
TRIM CONSTRUCTION
 ACTUATION AND ADVANCED DIGITAL
Trim is engineered to offer a smooth behavior even
POSITIONING CONTROL
under the most severe conditions, making possible
reduction in thrust requirements and actuator
Pneumatic piston are typically used in actuation of
sizing
40 series valves: typically rack & pinion for size up

high pressure drop capabilities
to 3’’ (DN80) and scotch yoke pneumatic piston

facing up of cavitation matters
actuators

noise abatement
applications.

dealing with dirty, sticking or slightly abrasive
actuators are available on request too.

fluids

quality
machining
control to ensure
parts;
all
this
also
the
low
and
high
hydraulic
shut
or
off
electric
industrial
group
that
holds
RMT
Valvomeccanica) or other main manufacturer.
operating costs

size
addition,
construction (a well known sister company inside
precision of
means
bigger
In
Pneumatic actuator may be of DVG automation
very smooth valve operations thanks to design
and
for
excellent flow control through different design
Actuator selection is always performed carefully to
of
match the valve design features and offer excellent
the
ball
and
seating
elements:
precise
valve positioning for the best process control.
contouring of the V profiles offer modified equal
percentage
flow
characteristics
suited
to
Advanced valve diagnostic is available.
specific application.
Smart
provide
communication
real-time
hardware
preventive
and
and
software
predictive
diagnostic data. Best brands are available and
skilled technicians at complete disposal.
6
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
DIFFERENT CONSTRUCTION TYPES AND WIDE RANGE OF TRIM SOLUTIONS FOR

EFFICIENT VALVE OPERATION
RMT has engineered three design types in order to
be able to suit every kind of applications of ball
control valves, even the most severe ones:
-
45 Series: is the V cut series of RMT ball control
valves.
A V cut design is performed to make possible
have a perfect equal percent characteristic.
V cut shape allow high rangeability, up to 150:1:
in this way is possible to optimize control both
during
high
turndown
processes
(low
flow
requirements) and during normal operational
phases when maximum CV shall be provided
(high flow rate required).
Moreover
the
intrinsically
V
cut
shapes
self-cleaning
and
assures
an
non-clogging
design.
-
43 Series: is the multistage series of ball control
valve.
A multistage labyrintic trim is built inside the
ball element, thus making possible to realize a
multistage
approach
to
pressure
reduction
across the valve.
A multistage approach make possible to control
noise
matters
and
especially
cavitation
phenomenon.
In this way we are able to couple the advantages
of a ball design with those of a multistage
approach customized on the particular process.

-
Cavitation control trims CCT43
42 Series: is the low noise series of RMT ball
control valves.
The concept design is to realize a multipath
approach for noise abatement.
These valves are therefore provided with special
diffusers for noise control.

Noise control trims NCT42
Trim and constructive tips combined with suitable
material selection make 40 series suitable for a
wide range of applications, even the most severe
one in terms of pressure/temperature combination
and type of fluid:

No Erosion / corrosion applications (sour liquids
or gases)

High Temperature operations

Low Temperature operations: CRYO service.
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PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
HIGH RELIABILITY

MATERIAL SELECTION
We put a great attention into material selection,
especially with reference to the trim ones.
In order to offer the best wear resistance and a
We can guide you through the best choice at the
long
best cost even under the most severe conditions of
working
life,
following
key
feature
characterize the 40 series control valves.

fluid temperature/pressure combination.
WIDE RANGE OF MATERIAL
Materials are available for application involving sour
The 40 series control valves have been developed to
liquids or gases. Design can be in compliance with
cover a wide range of applications with practically
NACE MR0175-2003.
no limit in pressure and temperature.
Great
attention
is
put
into
material
selection,
Forged
raw
materials
are
the
standard
of
especially in severe service applications where
construction, thus assuring an higher quality rather
erosion or corrosion problems may be present.
than casted components.
Sour service material class possibilities and
Exotic materials, solid tungsten carbide and ceramic

materials can be provided for trim components.
DESIGN CONSTRUCTION AND TRIM
SELECTION
As a brand of GIVA Group, RMT is perfectly
The variety of design construction types and the
integrated with the still mills, forges, foundries and
different trim solutions let us to develop a valve that
machining shops of the company.
is able to suit the customer process conditions.
RMT has the full support of an own advance metal
40 series are able to face up and control the effects
testing laboratory located next to the factory.
of flashing, cavitation and noise matters, even in the
most
severe
service
conditions:
high
or
low
temperature applications, corrosive atmospheres,
erosion matters,…

SEAT TIGHTNESS
Seat leak class IV of ISA reference is our standard,
but we can also achieve class V, class VI up to a
zero leakage design, depending on the customer
request.
COMPACT DESIGN
40 series ball control valve up have been engineered
with a compact assembly up to NPS 12’’ (DN 300)
and
rating
#600:
upper
and
lower
trunnion
construction for 2 pieces body-closure design.
For above mentioned size/rating combination short
face to face dimensions make possible
-
global cost reduction
-
simplified handling and installation
-
quick
change
for
easier
maintenance,
that
means also lower maintenance costs.
Valve packing offers a easy maintenance “top entry”
design and the possibility of a quick change.
There is no need of any special components during
assembly or disassembling operations.
8
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.
1.
2.
3.
4.
5.
6.
9.
10.
12.
13.
14.
15.
16.
18.
19.
23.
24.
27.
28.
30.
61.
62.
71.
72.
81.
82.
83.
84.
85.
86.
87.
88.
TECHNICAL DESCRIPTION
BODY
CLOSURE
BODY STUD
BODY NUT
STEM/UPPER TRUNNION
LOWER TRUNNION
BALL
SEAT RING
BONNET
PACKING FLANGE
PACKING STUD
PACKING NUT
PACKING FOLLOWER
YOKE/ISO FLANGE
PACKING GLAND BOLT
LOWER FLANGE
LOWER FLANGE BOLT
YOKE STUD
YOKE NUT
SPRINGS
AXIAL BEARING
RADIAL BEARING
PACKING RINGS
PACKING END RINGS
PACKING GLAND
FIRE SAFE GASKET
PACKING GLAND O RING
LOWER TRUNNION
O RING
LOWER TRUNNION
FIRE SAFE GASKET
BODY-CLOSURE O RING
BODY-CLOSURE
FIRE SAFE GASKET
SEAT O RING
SEAT FIRE SAFE GASKET
45 SERIES STANDARD CROSS DRAWING:
TWO PIECES CONSTRUCTION
UP TO NPS 12’’ (DN 300) AND RATING #600.
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PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
45 SERIES API 6D CROSS DRAWING:
THREE PIECES CONSTRUCTION
FROM NPS 12’’ (DN 300) UP TO NPS 48’’ (DN 1200)
UP TO RATING #2500.
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PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.1

BODY/CLOSURE
2.2
Design.
BONNET
Forged or rolled steels are used for bonnet raw material.
Bodies of 40 series valves have a side entry design as
Bolted design with valve body is provided as standard.
standard.
Standard
Pressure/temperature ratings and mechanical design
temperature of the controlled fluid is between -30 ˚C
are according to ASME B16.34.
and 600 °C making use of different packing type

Materials of constructions.
execution
solutions.
As standard, forged raw materials are used.
Refer
cover
to
applications
packing
section
where
for
the
detailed
explanation.
The choice depends on the combination of fluid type,
NON STANDARD EXECUTION ARE AVAILABLE:
pressure rating and design temperature.
-
extension for high temperature application, in order
Carbon Steel and stainless steel, Duplex, Nickel alloys
to lower packing and operator temperature: in this
and
cases graphite based solutions are available for
other
exotic
material (DIN, ASME or
ASTM
specification) can be provided.
packing;
RMT Valvomeccanica have the full support of the steel
-
mills forges and of the holding (GIVA) group for high
extension in order to increase packing and operator
temperature for low temperature application, down to
quality standards.
-196°C ( cryogenic);
-
Weld overlay (SS 316 or Inconel 625 as standard) of
special constructions with grease injection points for
emergency sealing may be provided;
the wetted parts is possible for the best corrosion
-
resistance at the lower cost.
customizable solutions.
As a standard of construction, bonnet material is the
same of body. Weld overlay (SS 316 or Inconel 625 as

Size and rating.
standard) of the wetted parts is possible for the best
Dimensions up to NPS 12’’ (DN 300) and rating #600
corrosion resistance at the lower cost.
are provided with a “two-pieces” bolted execution
For material choice, refer to material selection guide.
(body & closure).
2.3
Out of this size/rating combination standard design is
according
API
6D,
with
“three
pieces”
bolted
40 series have been developed with different suitable
execution (body & upstream/downstream closure).

packing solutions that make possible to control fugitive
emissions levels.
End to end connections.
Due to the modulating service of a control valve packing
Flanged body-closure is the standard construction.
has been designed to allow adjustment over the service-
Short face-to-face dimensions are provided for the
life of the valve.
compact design, that is up to NPS 12’’ (DN 300) and
Packing is designed to offer:
rating #600.

Out of this size/rating combination standard end-to-end
Flow direction.
Standard flow design is unidirectional.
top entry design
-
fully welded design
-
casting bodies
-
flangeless construction
-
bi-directional flow type

reduction in environment contamination;

respect
of
the
criteria
of
most
restrictive
legislations, avoiding connected sanctions
Fire Safe design is allowable on request.
NON STANDARD EXECUTION POSSIBILITIES:
-
limitation in the loss of process fluid, thus
increasing efficiency;
dimensions are according API 6D.

PACKING
2.3.1 STANDARD LOW EMISSION PACKING
Low Emission (LEM) packing meets the criteria of ISO
15848-1: CC3 class.
It is made by a series of pre-formed braided rings PTFE or
GRAPHOIL based with two anti-extrusion terminal solid
rings.
For rating tables, refer to product spec. section.

For material choice, refer to material selection guide.
PTFE based rings can be adopted from
-30 °C up to 200°C with a plain bonnet and from
-30°C up to 300 °C with an extended one;
max allowable pressure is 250 Barg.
11
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES

GRAPHOIL based can be adopted from
-30 °C up to 600°C with a plain bonnet and from
-100°C up to 600 °C with an extended one;
there are no practical limitation in max allowable
pressure.
Furtherly it’s possible to introduce to standard design:

leak-off in order to provide the possibility of
measuring the emission level;

packing follower with a dual O-ring design
that
allows
very
high
performances
with
extremely volatile gas
LOW EMISSION PACKING (LEM) WITH LEAK OFF AND
DUAL OPTIONAL O RING
2.3.2
LIVE LOADING LOW EMISSION
PACKING
Live
Loading
maintain
to
Low
Emission
optimal
levels
packing
the
(LL-LEM)
leak
can
performance
practically during all life service of the valve.
This is possible by the use of bellows springs that
maintain a constant sealing force within the packing box.
STANDARD LOW EMISSION PACKING (LEM): PTFE BASED
13.
14.
15.
16.
71.
72.
The results is constant low leakage performance with
minimal field adjustment.
PACKING FLANGE
PACKING STUD
PACKING NUT
PACKING FOLLOWER
PACKING RINGS (PTFE BASED - CRANE 285K)
PACKING END RINGS (PTFE @25% GLASS LOADED)
LIVE LOADING LOW EMISSION PACKING (LL-LEM)
STANDARD LOW EMISSION PACKING (LEM): GRAPHITE BASED
13.
14.
15.
16.
71.
72.
PACKING FLANGE
PACKING STUD
PACKING NUT
PACKING FOLLOWER
PACKING RINGS (GRAFOIL BASED)
PACKING END RING (SOLID GRAPHITE)
12
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.4 TRIM COMPONENTS
Different constructive tips make 40 series of ball
control valves capable to suit a wide range of
applications, even the most severe.
Different trims solutions have been applied to 40
series in order to be able to couple the advantages
of a ball control valve solution with the capability to
face also up:
-
applications where risk of flashing/ cavitation
could occur: RMT Controls have developed 43
series of multistage ball control valves;
-
applications
affected
by
noise
matters
UPPER AND LOWER TRUNNION CONSTRUCTION
and,
consequently, its abatement:
RMT Controls have developed 42 series of ball
control valves for a multipath approach to noise
abatement and, eventually, a multistage approach
too where necessary;
-
applications characterized by the presence of
dirty, sticking or slightly abrasive fluids: 45 series
of V Cut Ball Control offers not only an effective
way for customized characterization of valve flow
characteristic, but also a self-cleaning and anticlogging design in case of “dirty” applications;
-
applications where corrosive or
high abrasive
STEM AND BEARING RETAINER DESIGN
fluids are involved: for these application special
solutions with unconventional ceramic materials
Stainless steel materials are used for trunnions while
have been developed.
The main goal is to obtain a smooth control and a
precise positioning from one side, and guarantee
high
performances
and reliability
along
the
all
service life of the valve.
2.4.1
Two
-

reference to upper trunnions/stem execution.

TRUNNION/STEM AND BEARINGS
different
Anti-blow out design is a standard of construction with
Antistatic device is possible on request according to
API 6D and ISO 17292:
constructions
are
provided
stem/trunnion:
-
carbon steel ones for bearing retainers.
for
throw a small spring loaded ball electrical continuity
between the stem and the valve body is ensured.
Two kind of bearing are used:
(standard
radial bearing to allow components rotations with low
execution in case of 2 pieces body-closure design)
characterize by short face to face dimension;
axial: to hold the thrust due to internal pressure, using
upper
trunnion
and
lower
trunnion
stem and bearing retainer in compliance with API
6D face to face dimensions.
friction;
antifriction washers.
Special bearing materials are used to lower friction,
thus obtaining a smoother control, and reduce wear,
Heavy duty trunnions make possible longer service
life with reduction in terms of maintenance.
Torque for ball positioning is transmitted by the
upper trunnion / stem that can be a spline shaft (with
DIN grooved profile) for enhanced precision into
positioning.
13
for lower maintenance costs and enhanced reliability.
RMT Controls works continuously in partnership with
well-known bearing manufacturers to select the best
choice for the required application.
Refer to material section guide for standard materials
of construction.
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.4.2
SEAT RING AND BALL ELEMENT
2.4.2.1 SEAT RING CONFIGURATION
Since the modulating type of service, RMT 40
series
are
single
seated
as
a
standard
of
construction
Standard design of seat configuration is single
piston effect and the flow is therefore with a
preferred direction.
SINGLE PISTON AND DOUBLE PISTON EFFECT
Independent floating spring loaded seat is in
COMPARISON
contact with the ball when the pressure comes
from the upstream line, thus providing an effective
seal even at low differential pressure.
2.4.2.2 SEAT RING SEALING
In case of reverse flow direction standard single
piston seat configuration is no more capable of
sealing, since the seat would release the pressure
(self relief).
CONSTRUCTION
Depending
on
pressure/temperature
combination,
and considering the type of fluid and application, two
main construction are possible:

This
METAL TO METAL SEAT
design
make
possible
to
offer
high
performances in terms of leakage capability:
-
in applications where dirty and/or abrasive fluid
are involved;
-
in applications where high design temperature
are required.
A metal to metal seat offers also lower maintenance
SINGLE PISTON EFFECT STANDARD CONFIGURATION
Customizable
standard
solutions
execution:
are
double
available
seat
as
costs and longer field life.
non-
configuration
and/or double piston effect configuration may be
provided.
In double piston effect, configuration independent
floating spring loaded seat is always in contact
with the ball to provide an effective sealing, even
at low differential pressure.
METAL TO METAL SEAT CONSTRUCTION
In case of n on standard double seat construction,
a combination of single piston effect on upstream
seat ring and a double piston execution on the
downstream ring are possible, as an alternative to
a relief valve for avoiding overpressure at the body

Leakage class.
Leakage class up to class V according to ANSI/FCI
70-2 and IEC 60534-4 is possible.
cavity.

SOFT SEAT
This design make use of relisient insert that make
possible to reach higher leakage classes.
This design is mainly limited by
-
the service temperature: max 250 °C;
-
the type of fluid: not suitable in case of abrasive
applications.
DOUBLE PISTON EFFECT: NON STANDARD
CONFIGURATION
14
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES

Cladding
with
highly
corrosion
resistance
material is possible (SS 316 or Inconel 625 as
standard) for the best corrosion resistance at
the lower cost: both for wetted parts and
especially for dynamic seals areas.

Carbide
coating
on
sealing
area
may
be
performed on metal to metal construction, thus
SOFT SEAT CONSTRUCTION
enhancing valve reliability against wear.
-
Special execution may be provided with injection
tungsten carbide coating TCC for service
temperature up to 350 °C (120µm and
points for emergency sealing in case of any failure
over);
up to seat replacement.
-
chromium carbide coating for service
temperatures higher than 350 °C(120µm
and over).

Stellite overlay is possible as a non standard
execution that couple an high wear capability
with greater corrosion resistance than carbide
coating.
Since
LUBRIFICATED SOFT SEAT CONSTRUCTION

stellite
is
a
welding
overlay
it’s
characterized by cracking risks: therefore this
operation
has
technologies
Leakage class.
Leakage class better than class VI according to
ANSI/FCI 70-2 and IEC 60534-4 is possible.
to
and
be
performed
procedures
with
by
such
skilled
personnel that highly affect the valve cost.

Special materials and technological way of
constructions
are
possible
for
application
where highly abrasive fluids are involved:
for instance fully tungsten carbide obtained by
2.4.2.3 BALL
tungsten sintered powders or similar.
Ball is the plugging element of the 40 series.
RMT Valvomeccanica have the full support of the
Mechanical design is according to ASME B16.34.

steel mills, forges and metal testing laboratories of
Materials of constructions.
the
As standard material of constructions are the
same of the seating ring.
Forged
materials
construction
but
are
also
used
ball
as
from
holding
group
GIVA,
for
higher
quality
standards.
standard
casting
is
possible.

Antistatic device is possible on request
according to API 6D and ISO 17292:
throw
a
small
spring
loaded
ball
electrical
continuity between the ball and the valve body is
.
ensured.
Finite element analysis are performed to offer
2.4.2.4 MATERIAL OF CONSTRUCTION
customized and effective solution for the specific
The choice depends on the combination of fluid type,
application.
pressure rating and design temperature.

Carbon Steel and stainless steel, Duplex, Nickel
alloys and other exotic material (DIN, ASME or
ASTM specification) can be provided.
15
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.4.3
SEALING COMPONENTS (STATIC AND DYNAMIC)
The choice for sealing components is mainly based
on the combination of pressure/temperature from
one side and fluid type from the other.
2.4.3.1 O RING SEALS
O ring are the standard seals (both dynamic and
static) for temperature between -46°C and +250 °C.
Standard sizes from the market (section/ID) are
LIPSEALS
used for an easy replacement all around the world.
As a
standard
decompression
of construction
(AED)compound
anti explosion
are
2.4.3.3 GRAPHITE PACKING AND SPIRAL
chosen.
WOUNDS
For high pressure applications back up rings are
Standard seals for high temperature applications
used.
are:
The choice of the compound is performed by
technical
department
considering
both
the
operating conditions and the type of fluid, in order
to ensure performance and reliability for lower
maintenance
costs:
Fluoroelastomers
Hidrogenated
nitrile
HNBR,
–
-
graphite rings, self energized by fluid pressure,
for dynamic seals (seat & packing)
-
spiral wounds for static seals: they ae made of
graphite & SS316 rings, energized at assembly
Viton,
by a pre-compression.
Perflouroelastomers
(Kalrez), etc
O RING SEALS
2.4.3.2 LIPSEALS
Lipseals are the standard seals (both dynamic and
static)for low temperature application, between
-
196°C and +250 °C.
GRAPHITE RINGS & SPIRAL WOUND
They are made of an elastomeric jacket pre-
2.4.3.4 FIRE SAFE DESIGN
energized by an helicoidal spring that works being
Together
self energized by the pressure of the fluid.
with
the
basic
pressure/temperature/fluid
For high pressure applications back up rings are
design
used.
API6FA,API 607 and ISO 10497.
is
seals
for
applications,
possible, upon request,
different
fire
safe
according
to
The choice of the compound is performed by
A fire safe design is characterized by the use of
technical
the
graphite based sealing. They can be used as a
operating conditions and the type of fluid, in order
primary sealing elements and/or as a secondary
to ensure performance and reliability for lower
sealing elements, which can prevent for uncontrolled
maintenance
pressure relief in case of failure of the primary seals,
department
costs:
considering
Reinforced
jacket + Elgiloy spring,etc
both
PTFE
(RPTFE)
due to excessive high temperatures.
16
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.5
RMT CONTROL TRIMS FOR 40 SERIES
2.5.1 45 SERIES: V CUT BALL
CONTROL VALVE
The 45 series is the V Cut series of ball control
valve. The V Cut is the shape of the discovered
downstream area.
Through the good design of the V is possible to
perfectly customize the valve behavior both from a
flow capacity point of view (CV) and with reference
to the flow characteristic:
-
V
cut
may
be
tailor-suited
to
process
flow
requirements: high rangeability, high flow capacity
V CUT SEAT RING
or dealing with low flow conditions is possible
(micro V cut);
-
a near equal percentage behavior is possible;
-
precise positioning through a low friction design of
the whole trim;
-
capability to deal with dirty fluids, with a nonclogging design;
-
through
the
proper
selection
of
materials,
treatments and the good engineering of the whole
trim, is possible;
-
dealing with highly erosive applications;
-
dealing with sour service process conditions: high
corrosion resistance materials may be chosen, in
V CUT ELEMENT ON BALL: INTEGRAL AND SEGMENTED
compliance with NACE MR0175 requirements.
Moreover, the V cut may be performed on the
following components depending on the design:
-
obtained on the seat ring: this is our standard
design of construction.
Seat ring can be easily replaced with a different V
cut design for valve adapting to different process
conditions;
-
obtained on the ball element;
-
obtained on a V-cut diffuser placed downstream to
the valve:
DOWNSTREAM V CUT DIFFUSER
17
PRODUCT BULLETIN
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REV A
40 SERIES
2.5.1.1 45 SERIES FOR EXTREME EROSIVE APPLICATIONS: 45SS
For applications were severe conditions occurs from an erosive point of view, a special valve design with two
seating rings is possible.
45 SERIES FOR EROSIVE APPLICATIONS: 45SS
The upstream seat ring (blue marked) is the sealing
element.
The downstream seat ring is the modulating V
This design make possible to obtain:
-
a great rangeability: we are able to keep the ability
of regulate a small Cv (high pressure drop and valve
Cutted element: it performs the pressure reduction.
near to closed position) and a high Cv (low pressure
Immediately downstream this modulating element
drop and valve nearly completely opened). The
there will be the minimum passage area, that is the
valve can pass from one condition to another
vena
without the need of changing internal trim;
contracta,
where
the
fluid
reaches
the
maximum velocities: in this zone there are no
this high rangeability is very difficult to be reached
internal trim components but only a straight line
with a traditional globe style choke valve;
pipe, so that all the internal parts of the valve are
-
high tightness performance: since the type of
service, high leakage class is required, generally
preserved from any erosion problem.
better then class V. Through this special design we
are
The two seat are engineered in such a way that
-
same
material
is
located
downstream
to
-
ball
valve
is
45SS has been engineered to offer a low torque for
the no erosion design makes this ball control valve
of erosion due to high velocities related to gas
expansion.
suitable
for
severe
and
able to deal with two phase flow without problems
the
modulating seat ring.
This
performance
a smooth control action;
characterized by extreme hardness (for instance
In order to protect valve body a bushing made in the
leakage
sealing element;
occurring during initial modulating phase.
fully tungsten carbide with 1200 HV).
ensure
trim in the globe solutions) to protect from wear the
discovered, thus being protected from high velocities
advanced technique of sintering ceramic powders,
to
don’t need particular trim solutions (such as bi-tight
ring, when the upstream seat ring has already being
Downstream V Cutted seat ring is built with an
able
reliability for all the service life of the valve; we
pressure drop occurs only at downstream seating
service
conditions typical of a choke service, for instance
flashing conditions.
18
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.5.2 43 SERIES: MULTISTAGE BALL CONTROL VALVE
It’s undoubtable that when extremely high differential
pressure occurs into the process, a globe valve solution
offer the possibility to control the whole pressure drop
with extremely precision.
This is the reason why globe valve solution is often the
preferred choice in extremely critical operations, such
as pump recirculation services, turbine by-pass control
valves, etc.…
Our 43 series has the following purpose:
extend the concept of the multi stage design, typical of
a globe valve for low noise application or high DP
cavitation control, to a ball valve solution.
In this way, we are able to extend the typical high Cv of
a rotary control valve with axial flow, to moderate
severe
service
applications,
in
which
a
standard
segmented ball or butterfly control valve can’t be used.

2.5.2.1 : NOISE ABATEMENT
MULTIPATH APPROACH
Noise attenuation is obtained by breaking the flow into a
As a regulating device, a control valve is a noise
great number of multiple jets.
source.
In fact pressure waves produced by flow
Physically a multipath trim make possible to decrease the
turbulences are responsible of the aerodynamic
geometrical factor (Fd) of the valve and this permit to
noise, and it’s impossible to control the flow of a
shift to higher values the peak frequencies (fp) of the
fluid without introducing turbulences.
generated
Mechanical
vibrations
are
too
potential
noise
sources, but they can be easily avoided for a ball
valve through a good design. In fact, comparing to a
globe, a ball solution has much less problems of
vibrations due to the rotary design of the stem and
the consequent lower friction and damage of the
noise.
The
higher
will
be
noise
peak
frequencies respect to piping ring frequencies (fr),the
higher will be the noise attenuation obtainable by the
pipe itself (fp>fr).
The purpose is to maximize the flow breaking into
multiple independent jets. The independence of the flow
jets is the greatest limitation of this kind of approach.
packing.

MULTISTAGE APPROACH
Aerodynamic noise is generally a problem to be
Noise reduction can be achieved also with a different
faced with gases and vapors rather than liquids.
technique:
Liquids noise matters depends on another more
critical phenomenon: the cavitation. For
liquids
avoiding cavitation means basically to control also
the generated noise.
Furthermore, noise power is related to the stream
power of mass fluid that depends on the square of
fluid velocity. And gas/vapors velocities are much
more higher than liquids.
There are two approach for noise abatement in a ball
control valve.
the
multi-stage
approach.
If
the
whole
pressure drop is divided into multiple stages of pressure
reduction, it will be possible to change in favor of a noise
reduction the acoustic efficiency of the valve. Small
pressure drops p1/p2 make possible to control fluid
expansions and velocities keeping always the last stage
in sub-critical conditions.
This is mandatory for the noise abatement. Multistage
approach is very effective from a theoretical point of
view. Unfortunately, it has some practical limitation,
related to the number of feasible stages. Furthermore,
there are limitations to the obtainable expansion section
ratios to proper control the fluid velocities.
19
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.5.2.2 CAVITATION CONTROL
Cavitation is a phenomenon that characterizes liquid
Pressure recover, quantified by the parameter FL in IEC
flow behavior when pressure value becomes lower than
standards, cause the bubble to implode when the valve
the saturation Pv point.
outlet pressure becomes again higher than the vapor
When cavitation occurs the liquid begins to flash and
tension. Bubbles collapse can seriously damage solid
steam bubbles are generated. This condition is obtained
surfaces because of the high amount of energy released
in the so called “vena contracta” -where the pressure
with this phenomenon.
reach the lowest value and the velocity reach the peak
Cavitation highly affects both performances (vibrations,
values- before the recovery of pressure that occurs
noise, etc.) and reliability: metal surfaces undergo an
downstream to the reduce passage.
inevitable
pitting
damage
if
this
process
is
not
controlled. In order to face up this problem is necessary
to break the pressure drop into a convenient amount of
smaller pressure stages inside the ball valve. This is
shown in the following.
VALVE INLET
STANDARD CONTROL TRIM
inlet pressure
vena contracta area
outlet velocity
inlet velocity
outlet pressure
flashpoint
velocity
VALVE INLET
VALVE
OUTLET
pressure
vapour pressure
MULTI STAGE CAVITATION CONTROL TRIM
inlet pressure
vena contracta area
VALVE
OUTLET
outlet velocity
inlet velocity
outlet pressure
flashpoint
velocity
pressure
20
vapour pressure
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
break the flow into multiple jets thus coupling the
2.5.2.3 RMT 43 SERIES BALL CONTROL VALVES
advantages of a multistage approach with those of a
multipath one in the noise abatement, as well described
FOR CAVITATION AND NOISE CONTROL
43 Series has been engineered to offers a strong ball
previously.
valve solution to face efficiently up both cavitation and
noise matters, on the basis of the physical greatness
involved in this two phenomena.
With reference to cavitation matter, 43 Series make
possible to break the whole pressure drop into multiples
stages.
The adoption of a multiple stage design allow to avoid the
cavitation beginning since the pressure is kept always
higher than the flashpoint limit, by an engineered control
of the fluid velocities.
This is obtained by the insertion of parallel perforated
plates inside the ball that realize the multiple breaking of
the entire pressure drop.
In order to make the plates work properly it’s necessary
to control the grade of opening for the valve: an optimal
opening would be lower than 40-45 degrees.
This is necessary to avoid the fluid to by-pass the plate
and reach the downstream side vanishing their effect.
The good design of the plates offer our 43 series the
possibility to suit the particular process conditions, for a
customized design and improved performances.
Detailed calculation is always performed and made
available to the customer as a guarantee of the good
engineering of the valve.
During valve moving 43 Series trim act as a variable
resistant trim. This make possible to greatly increase
valve rangeability.
Great
attention
is
put
into
material
selection,
procurement and quality control.
As a brand of GIVA Group, RMT is perfectly integrated
with the still mills, forges and foundries of the company.
RMT has the full support of an own advance metal testing
laboratory located next to the factory.
We can guide you through the best choice at the best
cost
with
reference
to
fluid
temperature/pressure
combination.
43 SERIES BALL CONCEPT
The parallel plates are offset by an optimally designed
angle and allow to control fluid velocities thus obtaining
an improvement in terms of:
-
fluid stability, that means better performances and
lower
and
more
balanced
torques
(with
consequently gains in term of smaller safety
factors and overall cost);
-
noise emission.
Furthermore
the
engineered
design
of
the
43 SERIES BEHAVIOUR
holes
(disposition, diameter, number, etc) make possible to
21
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
2.5.3 42 SERIES: BALL CONTROL FOR EXTREME NOISE CONTROL
For extreme noise control, 42 series of ball control valve
make use of a downstream attenuator.
The goal is a great noise abatement through a multipath
approach.
Together with the noise reduction the attenuator, that
consists
in
construction,
a
spherical
make
cage
possible
as
a
vibration
standard
of
control
for
increased flow and therefore process stability.
Downstream spherical cages (one or more) represent
fixed stages for pressure reduction.
The 42 series cannot face only up noise matters, but it
can also be used for liquids.
In this last application, attenuator acts as a flow diffuser
with stabilizing capability and may help in case of
cavitation problems.
The variety of orifices in the cage allows to achieve a
precise control even with high pressure drop and small
flow rate.
Shape and number of the openings can be customized to
get optimal results in every condition.
Noise abatement up to 20 Db is possible with a single
cage construction and up to 25 Db with a double cage
execution.
Standard construction is full bore (to maximize drilled
available area of passage) with single seat and single
downstream attenuator.
Optional constructions are possible to suit customer
requirements:
-
two
or
more
attenuator
for
extreme
control
requirements;
-
reduced passages;
-
double seat construction;
-
double block and bleed execution;
-
bidirectional attenuation capability.
Drilled spherical cage can be also located inside the ball
element, thus coupling of 43 series variable multistage
approach with the attenuation capabilities of the 42
series.
Moreover
combination
of
multiple
and
fixed
stages
approaches is possible, for suited solution with the goal
of an optimal process control.
22
42 SERIES
PRODUCT BULLETIN
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REV A
40 SERIES
2.6 40 SERIES FLEX DESIGN FOR QUICK CHANGE AND EASY
MAINTENANCE
In order to make possible
NPS size up to 12’’ (DN 300) and rating up to #600 are the

quick change of the valve trim
standard of construction.

easy maintenance where necessary
Customize size/class combinations may be engineered.
without losing the constructive features and the control
Ball valve may be placed and removed from the upstream
capabilities of 40 series, a special flex designed has been
side of the valve, while the seat ring is kept in position by a
designed for the different types of RMT ball control valves:
retainer ring. During installation, retaining screws and
45,43 and 42 series.
washer are removed and the retainer ring is kept in
This design is characterized by a single seat design and an
position through a wafer design between valve body
integral body construction with flange connections.
upstream flange and pipeline flange.
End to end dimensions are according to ASME B16.10 with
All the constructive tips of RMT 40 series and all the trim
reference to short pattern design.
combinations of 45,43 and 42 series may be adopted in this
Flex design.
1.
2.
3.
4.
5.
6.
9.
10.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
71.
72.
81.
82.
85.
86.
87.
BODY
RETAINER RING
STEM
STUD
NUT
O RING
BALL
SEAT RING
B. SPRING
O RING
PACKING GLAND
PACKING FLANGE
STUD
NUT
PACKING FOLLOWER
PIN (NOT SHOWN)
COUNTERFLANGE
BOLT (NOT SHOWN)
LOWER TRUNNION
O RING
O RING
BOLT
LOWER FLANGE
PIN
PACKING
PACKING END RING
AXIAL BEARING
RADIAL BEARING
RETAINING WASHER
RETAINING SCREWS
WASHER
45 SERIES FLEX CROSS DRAWING: INTEGRAL BODY CONSTRUCTION:
UP TO NPS 12’’ (DN 300) AND RATING #600.
23
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
3.
3.1
ACTUATORS AND CONTROLLING DEVICES
ACTUATORS
a working package suitable for customer requirements with
Pneumatic piston are the standard in actuation of 40 series
valves:

the goal of a precise positioning for stable process control,
even in the most severe service conditions.
Advanced valve diagnostic is available.
rack & pinion for size up to 3’’ (DN80);
Smart communication hardware and software provide realtime preventive and predictive diagnostic data. Best brands
are available and skilled technicians at complete disposal.
3.2 POSITIONERS AND PANELS
Advanced digital positioner and controller are available for
enhanced performance and control.
This make possible improved process yields and real time
diagnostic
features
to
offer
real-time
preventive
and
predictive diagnostic data.

scotch yoke pneumatic piston actuators for bigger
size and high shut off applications.
Both
HART
and
Fieldbus
communication
protocol
are
available making reference to the best positioner brands on
the market.
In addition, hydraulic or electric actuators are available on
request too.
Dedicated positioner’s manufacturer software is provided.
Great variety of control panel configurations and wide range
of available accessories to offer you the best equipment for
your 40 Series operation:
Pneumatic actuator may be of DVG automation construction
(a well known sister company inside the industrial group
that
holds
RMT
Valvomeccanica)
or
other
main
manufacturer.
The coupling of correct actuator choice and valve high
quality in design and manufacturing make possible to obtain
filter
regulators
(standard),
gauges,
solenoid
valves,
boosters, limit switches, ……
Our technical department is at you complete disposal and
skilled
technicians
are
available
positioners/control panels trainings.
24
for
service
and
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
4.
PRODUCT QUICK SPECIFICATION
RMT BALL SERIES RATING TABLE
SIZES*
up to 48’’ [up to DN1200]
PRESSURE RATINGS*
ASME B16.5
up to #2500
[up to PN 420]
DESIGN TEMPERATURES*
-196°C up to 565°C
[-320°F up to 1049 °F]
*Standard codes of reference:
IEC60534 general design code
ASME B16.34 - EN 12516 strength design code
ISA75.19 - ANSI/FCI 70-2 – IEC60534 tests and inspections
RMT BALL CONNECTION TABLE
END CONNECTIONS: ASME B16.5 *
RAISED FACE RF
RING JOINT RJ
BUTT WELD
SOCKET WELD
X
X
X (not for Flex design)
*special on request (not for Flex design)
* Standard codes of reference:
IEC60534-3 end to end dimensions
MSS SP-6 surface finishing
RMT BALL PERFORMANCE TABLE
FLOW COEFFICIENT CV RANGEABILITY
Up to 87420
according to ISA 75 series IEC 60534-2
SEAT LEAKAGE
Up to class VI
according to ANSI/FCI 70-2 and IEC 60534-4
NOISE AND CAVITATION CONTROL
according to ISA 75 series and IEC 60534-8
FUGITIVE EMISSION CONTROL
Up to class A
according to ISO 15848-1
OPERATING PERFORMANCES
according to ANSI/ISA 75-25 and
IEC 60534-4
25
PRODUCT BULLETIN
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REV A
40 SERIES
5.
40 SERIES RATING/CONNECTION TABLES
STANDARD 40 SERIES
STANDARD 40 SERIES
SIZE
1’’ up to 2’’
3’’ up to 12’’
ASME 150 CLASS [PN 20]
ASME 300 CLASS [PN 50]
ASME 600 CLASS [PN 100]
DN
RF
RJ
THD
SW
BW
RF
RJ
THD
SW
BW
RF
RJ
THD
SW
BW
DN25 up to
DN50
DN80 up to
DN 300
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
STANDARD 40 SERIES
●
ASME 900 CLASS [PN 150]
ASME 1500 CLASS [PN 250]
ASME 2500 CLASS [PN 420]
BW
RF
RJ
BW
RF
RJ
●
●
●
●
●
●
SIZE
DN
RF
RJ
1’’ up to 48’’
DN25 up to
DN 1200
●
●
THD
SW
THD
SW
THD
SW
BW
●
40 SERIES FLEX DESIGN
40 SERIES FLEX DESIGN
ASME 150 CLASS [PN 20]
SIZE
DN
RF
RJ
1’’ up to 48’’
DN25 up to
DN1200
●
●
40 SERIES FLEX DESIGN
THD
SW
BW
ASME 300 CLASS [PN 50]
RF
RJ
●
●
THD
SW
BW
ASME 600 CLASS [PN 100]
RF
RJ
●
●
THD
SW
BW
ASME 900 CLASS [PN 150]
ASME 1500 CLASS [PN 250]
ASME 2500 CLASS [PN 420]
RF
RJ
RF
RJ
●
●
●
●
SIZE
DN
RF
RJ
1’’ up to 48’’
DN25 up to
DN 1200
●
●
THD
SW
BW
THD
SW
BW
THD
* Standard Flange Finish is Ra between 3.2 and 6.3 micrometers [125 and 250 micro inches]
* Customized flange faces and surface finish are available on request
26
SW
BW
PRODUCT BULLETIN
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REV A
40 SERIES
6.
MATERIAL SELECTION GUIDE
27
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
As a brand of GIVA Group, RMT is perfectly integrated with the still mills, forges and foundries of the
company. RMT has the full support of an own advance metal testing laboratory located next to the factory.
Throw the combination of following material tables is possible to suit every condition with reference to
fluid/pressure/temperature application.
PART
DESCRIPTION
1-2
BODY/
CLOSURE
BODY/
CLOSURES/
BONNET
3-4
STUD AND NUTS
5-6
STEM
9-10
BALL & SEAT
CARBON STEEL
A105
A350 LF2
A350 LF3
*1 *2
A193 B7 / A194 2H
A193 B7M / A194 2HM
A193 L7 / A194 GR4
A193 L7M / A194 GR4M
MARTENSITIC
STAINLESS
STEEL
AUSTENITIC
STAINLESS STEEL
DUPLEX
STAINLES
S STEEL
A182 F6a
(AISI 410)
AISI 316
AISI 321
A182 F44
A182 F51
A182 F53
A183 F55
-
A193 B8 / A194 GR8
A193 B8M/A194 GR8M
A182 F51
A182 F53
A183 F55
AISI 410 + ENP 75 µM
A105 + ENP 75 µM
A350 LF2+ ENP 75 µM
A350 LF3+ ENP 75 µM
*3
A182 F6a
(AISI 410)
*4
A182 F6a
(AISI 410)
*3 *4
12
BONNET
13
PACKING FLANGE
-
-
16
PACKING
FOLLOWER
-
-
18
YOKE/ISO FLANGE
23
LOWER FLANGE
27-29
YOKE
STUD AND NUTS
30
SPRINGS
A105
A350 LF2
(Fe based Zinc Plated)
A105
A350 LF2
A350 LF3
*5 *6
A193 B7 / A194 2H
A193 B7M / A194 2HM
A193 L7 / A194 GR4
A193 L7M / A194 GR4M
*5 *6 *7
-
A182 F6a
(AISI 410)
AXIAL BEARING
RADIAL BEARING
PACKING RING
SEALS



MONEL 400
INCONEL 625
A453 GR
660
-
AISI 316
A182 F XM 19
*4
A182 F51
A182 F53
A183 F55
*4
17-4PH
*4
MONEL K500
INCONEL 718
AISI 316
A182 F XM 19
*4
A182 F51
A182 F53
A183 F55
*3 *4
17-4PH
*3 *4
MONEL 400
MONEL K500
INCONEL 625
AISI 316
AISI 321
A182 F44
A182 F51
A182 F53
A183 F55
AISI 316
AISI 316
AISI 316
-
-
MONEL 400
INCONEL 625
-
-
-
-
-
-
-
-
-
A182 F51
-
-
-
-
-
INCONEL 750
INCONEL 718
-
AISI 316
-
A193 B8 / A194 GR8
A193 B8M/A194 GR8M
-
-
-
-
overlay on dynamic seal areas
*2 overlay on wetted areas
*3 hard coating (tungsten carbide or chrome carbide)
on seating contact surfaces (120 µm and above)
61
62
71-72
8x
-
NICKEL
ALLOYS
*5 *6 *7
A105
A350 LF2
A350 LF3
*1 *2
*1
OTHER
STAINLESS
STEEL
*4 electro nickel plating (25 µm and above)
*5 zinc plating (25 µm and above)
*6 hot dip galvanized HDG (ASTM A153 or ISO 1461)
*7 Fluorocarbon coated
PTFE BASEDAISI 316 + LOW FRICTION
REFER TO PACKING SECTION
REFER TO SEALING SECTION
Combination of the above material is possible.
Sour service materials and related certifications are possible.
Exotic materials, solid tungsten carbide and ceramic materials can be provided for customized trim
solutions.
28
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
7.
FLOW CHARACHTERISTICS
45 SERIES
43 SERIES
Max CV
DN
42 SERIES
Max CV
DN
1''
2''
3''
4''
6''
8''
32
113
306
499
1316
2270
1''
2''
3''
4''
6''
8''
DN
1''
2''
3''
4''
6''
8''
Max CV
45
164
374
683
1536
2731
10''
12''
14''
16''
18''
20''
4336
6268
7617
10120
12979
16193
10''
12''
14''
16''
18''
20''
3675
5311
6862
9170
11375
14195
10''
12''
14''
16''
18''
20''
22''
24''
26''
28''
30''
32''
19763
23687
27358
31944
36885
41434
22''
24''
26''
28''
30''
32''
17180
21855
25670
29760
34170
38890
22''
24''
26''
28''
30''
32''
36''
40''
48''
52156
65039
92827
36''
40''
48''
49210
60760
87420
36''
40''
48''

Flow characteristic is equal percentage.

Customized solution on specific process condition.
29
58
139
269
636
1188
1885
2726
3312
4715
6047
7544
9207
11035
12745
14882
17184
19303
24298
30300
43246
PRODUCT BULLETIN
RMTC-PB-40S-001
REV A
40 SERIES
RMT CONTROLS
a division of RMT VALVOMECCANICA – GIVA GROUP
Via dei Patrioti • 21058 Solbiate Olona (VA) Italy
Ph: +39 0331 375441 • Fax: +39 0331 376847
[email protected]
www.rmtvalvomeccanica.com
30