Pipeline Pressure Operated
Selective Shutdown Capability
Compact System
Adaptable to Existing System
Field Adjustable
Withstands Harsh Environment
DeltaMaticTM
Rate of Drop
Linebreak
Detection
System
General Description
The Bettis DeltaMatic™ linebreak detection
system is designed to automatically monitor a
gas pipeline and send an instrument pressure
signal if a predetermined rate of pressure drop is
exceeded. The system is typically used to detect
a pipeline break situation and signal a valve
operator. This automatic shutdown function
provides safety and environmental protection in
populated areas, river crossings, remote areas and
other locations.
Features and Benefits
Works on pipeline pressure, no electrical power
required
■
Allows normal pipeline pressure fluctuations
without shutdown
Compact and assembled as a complete unit
Can be retrofitted into an existing system with
minimal field hook–up
Can be installed remote from or directly on valve
operator
■
■
■
■
■
■
■
■
Uses a labyrinth type flow restriction (restrictor)
providing a large passage size compared to an
equivalent orifice or metering valve
Standard rate of drop ranges down to 5 and up
to 120 psi/minute
Rate of drop setting can be easily field adjusted
Functions in extreme cold environment to –50°F
[–46°C]
Application with Gas/Hydraulic Operator
10
SEPERATE TAKE OFF (OR ISOLATE #101 TO RE-OPEN)
13
12
LIST OF COMPONENTS
SUPPLY
POWER GAS
HYDRAULIC
ELECTRICAL
FIELD CONNECTION
J1-RT2
BASIC SUBPLATE
25
24
5
4
3
3
OPEN
CLOSE
TEST
CONNECTION
120
105
91
93
103
102
15
92
102
TIME
DELAY
SYSTEM
(OPTIONAL)
7
7
1
6
108
101
119
6
8
8
37
9
107
DOWNSTREAM SIDE PREFERRED
NOT ESSENTIAL
PIPELINE
2
IN CASE OF REDUCED PORT VALVE OR ELBOWS, TAP OR MN
10 PIPE DIAMETERS DOWNSTREAM TO MINIMIZE TURBULENCE EFFECTS
2
PLUGGED PORT
SIGNAL
VENT
RETURN
OPEN
CLOSED
1
2
3
4
5
6
7
8
9
10
12
13
15
24
25
37
91
92
93
101
102
103
105
107
108
119
120
OPERATOR
LINE VALVE
GAS/HYDRAULIC TANK
3-WAY VALVE, MANUAL
3-WAY VALVE, MANUAL/PILOT
SELECTOR VALVE
SPEED CONTROL VALVE
CHECK VALVE
HANDPUMP
FILTER
PRESSURE REGULATOR
RELIEF VALVE
END OF STROKE VALVE
CHECK VALVE
REVERSING RELAY
HANDPUMP SAFETY VALVE
ORIFICE, TIME DELAY (OPTIONAL)
TANK, TIME DELAY (OPTIONAL)
FILTER (OPTIONAL)
PIPELINE ISOLATION VALVE
FILTER
CHECK VALVE
RESTRICTOR
TANK DRAIN VALVE
RATE TANK
PRE-FILTER
DIFFERENTIAL PRESSURE PILOT
OPERATION
– SHOWN WITH LINE VALVE OPEN
– LINE VALVE WOULD CLOSE WITH POWER GAS PRESENT
– LINE PRESSURE IS APPLIED TO DIFFERNTIAL PRESSURE PILOT (120) AND TO RATE TANK (108) THRU
– CHECK VALVE (103).
– THE DIFFERENTIAL PRESSURE PILOT (120) COMPARES LINE PRESSURE WITH REFERENCE PRESSURE IN
– RATE TANK (108). IF LINE PRESSURE DECREASES, A DIFFERENTIAL PRESSURE IS CREATED BETWEEN
– RATE TANK AND LINE ACROSS RESTRICTOR (105). THIS DIFFERENTIAL PRESSURE, MEASURED BY THE
– DIFFERENTIAL PRESSURE PILOT, IS A FUNCTION OF RATE TANK SIZE, RESTRICTOR SIZE, AND
– RATE OF DROP OF LINE PRESSURE. WITH THE RATE TANK SIZE BEING FIXED, AND RESTRICTOR SIZED
– FOR A GIVEN APPLICATION, THIS DIFFERENTIAL PRESSURE IS DIRECTLY RELATED TO RATE OF DROP OF
– LINE PRESSURE. THE DIFFERENTIAL PRESSURE PILOT IS CALIBRATED TO VENT A SIGNAL FROM THE VALVE
– OPERATOR CONTROL WHEN THE RATE OF DROP EXCEEDS A PREDETERMINED SETTING.
Typical System Calibration
130
If the required rate of drop range should change or
be revised by the user, the DeltaMatic unit can be
converted to a different nominal range in the field
by fitting a different restrictor. (Table A).
Available Options
■
■
■
■
■
■
■
■
Back-up low pressure detection
Time delay control system, adjustable
1 to 4 minutes typical
Sour gas pipeline application
Weatherproof enclosure
Prefilter on pipeline
connection
Alarm to control room
pressure switch
Higher rate of
drop ranges
Manual reset,
lockout or override
30
40
50 60 70 80 90100
150
130
60
50
50
40
40
30
30
20
20
10
09
08
07
10
09
08
07
06
06
05
UM J-1
MINIM INT
SETPO
/L
GP
03
PS
PSI
02
IG
P/L
120 PSIG
P
0P
150 SIG /L
0P
SIG P/L
P/L
03
04
02
900
04
J-1
PILOT
SPRING
RANGES
20
60
300
The rate of drop setting of the system can be
changed by adjusting the DeltaMatic pilot to a
different ∆P. This may require selecting a different
spring, which may be changed and recalibrated in
the field.
6 7 8 9 10
100
90
80
70
05
4" BLACK
The DeltaMatic pilot is then set to trip at this ∆P by
selecting a spring and adjusting the setpoint.
2" BLUE
Example: If the rate of drop to be detected is 20
psi/min and pipeline pressure is 600 psig, then the
corresponding ∆P is 26 psig (as shown).
5
600
2" GREEN
2" RED
The calibration chart for the selected restrictor
(example at right) is used the find the differential
pressure (∆P) corresponding to a specific rate of
drop and pipeline pressure.
4
100
90
80
70
DIFFERENTIAL PRESSURE, ∆P (PSID)
A restrictor size is selected at the factory, based
on a specified rate of drop range and pipeline
pressure range.
3
2
01
01
3
2
4
5
6 7 8 9 10
20
30
40
50 60 70 80 90100
150
RATE OF DROP, RoD (PSIG/MINUTE)
P/L
PIPELINE PRESSURE
RoD RATE OF PRESSURE
PIPELINE PRESSURE
∆P
DIFFERENTIAL PRESSURE
ACROSS J-1 PILOT
SG
SPECIFIC GRAVITY
THIS CHART SHOWS RoD AND ∆P FOR NATURAL GAS, SG = 0.67
FOR AIR, SHIFT THE LINES TO THE LEFT USING:
(RoD, AIR) = 0.85 X (RoD, NATURAL GAS)
DeltaMatic Type
Number
400416
200416
100416
050416
Nominal RoD Range
(psi/min)
5 to 15
10 to 30
20 to 60
40 to 120
Table A
Calibration Kit
3
Typical Assembly/Dimensional
6.50"
[165]
ITEM
10.63"
[270]
20.00"
[508]
9.00"
[229]
150
160
2.00" [51]
120
110
120
130
140
150
160
170
DESCRIPTION
ENCLOSURE (OPTIONAL)
SUBPLATE
MOUNTING BRACKET (TYPICAL)
RATE TANK
MANIFOLD ASSEMBLY
J-1 PILOT
PREFILTER (RECOMMENDED)
B
C
170
16.00" [406]
20.00" [508]
A
PIPELINE CONNECTION:
B
SIGNAL (COM) CONNECTION
150 PSI MAX: 1/4 NPT
C
SUPPLY (N.O.) CONNECTION
150 PSI MAX: 1/4 NPT
A
D
D
HP CALIBRATION PORT:
E
LP CALIBRATION PORT:
1/4 NPT
1/4 TUBE
1/4 TUBE
LB [ 27.3 KG]
WEIGHT: 60
(EXCLUDING ITEMS 110 AND 130)
2.00" [51]
110
130
A
E
Ordering Information
Operating Environment
■
■
■
■
■
Line Pressure range
Max. and min. temperatures
Humidity, rain and snowfall
Service media
Mounting; backplate
or enclosure
Control specifications
■
■
■
■
■
Rate of pressure drop range
and setpoint
Pneumatic supply pressure
(maximum)
Output signal: vent or apply
to trip
Additional controls, options
Special requirements
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BETTIS BULLETIN # 41.00 REV: 10/03 5M/10-03
Bettis Bulletin # 41.00 Rev: 01/16 5M/01-16
EUROPE
www.emersonprocess.com/bettis
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Berenyi u. 72- 100
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