C E N T R I F U G A L
P U M P S
Technical Handbook
ASME B73.1
Chemical
Processing
Pump
Model A9
Wilfley Model A9 Features and Benefits
The new expeller
provides increased
dynamic sealing
with lower power
consumption and
longer wear life
DryLock II static
seal re-engineered
for reliable sealing
and available in a
variety of material
combinations
Robust shaft design
optimized to achieve
lower L3/D4 ratios to
minimize deflections
at seal faces for
maximum seal life
and reliability
Optimized hydraulics
available in a large
selection of alloys to
meet your specific
requirements
Heavy duty case
design available in
both 150 and 300 lbs.
flanges
Alloy shaft sleeve to
fully isolate the shaft
from any contact with
the pumpage
Case and expeller
cavity drain options
are available
(not shown)
Expeller/Seal
flush capability
Convenient
Lifting point
Stainless steel
labyrinth oil seals to
prevent contamination
are identical on both
inboard and outboard
locations for ease in
assembly and inventory
Extreme Duty Bearings
Option availavle for
severe high horsepower
applications
Easy internal adjustments
via external adjustment
bolts
Large sight glasses on
both sides to verify oil level
2-piece bearing frame
optimized for maximum
horsepower capabilities
Frame adapters available
in duplex stainless steel,
designed to protect the
bearing unit from pumpage
Wilfley Model A9 Chemical Processing Pumps
ASME B73.1
Wilfley’s Model A9 pump series is
conservatively designed and robustly constructed to offer high reliability in the most difficult pumping
applications.
The Model A9 is an end-suction,
single stage centrifugal pump that
meets or exceeds ASME B73.1 requirements. It handles liquids that
are highly corrosive and abrasive.
Discharge sizes range from 1”
(25mm) to 8” (200mm) in diameter.
Flow rates range to over 5,280 USGPM (1,200 m3/hr).
Traditionof Innovation and
Quality
Arthur Redman Wilfley was an inventor and entrepreneur. He began
working on centrifugal pumps in
1902. Wilfley’s first commercially
available pump was sold in 1919
and was built around his unique
concept of the expeller for hydraulic sealing. He continued to perfect
the expeller design and received a
patent in 1920. The Wilfley expeller
continues to be the unique hallmark
of Wilfley pumps.
Arthur Redman Wilfley
(1860-1927)
Frame 2 Model A9 Chemical Pump
3
Ultimate Seal Flexibility
The Model A9 pump is available
with the Wilfley dynamic seal where
the rotating expeller component
creates a hydraulic seal that moves
the pumpage away from the shaft
penetration while the pump is operating.
Benefits include operation without
rubbing seal contact, no heat generation, no continuous seal water
required, no gland packing, and the
ability to operate under less-ideal
conditions including the ability to
run dry.
The Wilfley Drylock® II static seal is
engineered and tested to provide
positive sealing at pump shutdown.
The Model A9 pump is also available in a wide selection of commercially available single and double
mechanical seals.
Wilfley hydraulic seal in actual
operation
“When an ordinary pump is not enough”
4
Wilfley DryLock II Seal
DryLock® II Features
The Drylock® II is Wilfley’s latest version of a positive static seal to prevent
product leakage as the Model A9 pump shuts down and dynamic sealing
is lost.
The actuator assembly contains stainless steel balls that, as the
pump starts up and the assembly rotates on the shaft, the balls
centrifugally move outward in fixed slots contacting and moving
an actuator plate to open the seals (rotating and stationary seal
components). The dynamic seal evacuates the liquid in the
seal chamber to the point where there is an equalized balance between the pumpage and atmosphere.
The Wilfley dynamic seal with Drylock® II operates
without seal components in rubbing contact or backup
packing. This eliminates the need for flush water in
most cases.
As the pump is shut down, the centrifugal force of
the steel balls is diminished and a spring forces
the seal components together to prevent product leakage.
The Drylock® II can be supplied as a total cartridge assembly or individual components
can be easily replaced in the field. Precise
in-field adjustment is also easily accomplished without the need of special tools.
Actuator Assembly
5
Wilfley Options Seal
Seal flush capability
when required
(startup/shutdown)
Corrosion resistant
composite ball housing
reduces rotating mass
and saves energy
Seal cartridge
offers easy
adjustment
to precisely
set the seal
opening
Pump Off/
Seal Closed
DryLock® II - Style A2
(For higher solids concentrations)
Rotary and
stationary seal
components
are available
in a variety of
materials
Flow interruptor
Seal housing
with drip lip
also available
Isolated
spring for
reliable seal
closure
Mechanical Seal
(Tapered Bore)
Shaft sleeve
positively
isolates the
shaft from
the pumpage
Pump Running/
Seal Open
Actuator assembly can
be fitted with a varied
number of steel balls
to precisely control the
static seal operation as it
varies with pump speed
Toleranced
bushing to
limit leakage
Seal drain
DryLock II - Style A1
®
Mechanical Seal
(Straight Bore)
6
Model A9 Pump Capacities
60 Cycle Performance
Frame 1
7
Frame 2
Frame 3
Frame 4
50 Cycle Performance
Frame 1
Frame 2
Frame 3
Frame 4
8
Materials of Construction
Materials
The Wilfley Model A9 pump is
available in any machinable alloy
to meet a wide range of pumping
requirements.
Materials of construction include,
but are not limited to: ductile iron,
duplex and super duplex stainless
steels, nickel alloys, hard irons and
a variety of austenitic stainless
steels including Alloy 20 (CN7M),
304L (CF3) and 316L (CF3M).
Wilfley’s engineering and metallurgical staff has the knowledge and
expertise to assist you in material
selection. Wilfley maintains an extensive library of pumping services
and corrosion/abrasion data. Wilfley also performs ongoing testing to
evaluate the effects of abrasion and
corrosion on a variety of materials.
To assist with material selection,
Wilfley can provide material coupons for testing in your particular
application followed by a material
deterioration analysis report.
Wilfley’s in-house metallurgical resources have developed unique
materials to survive in the most
hostile environments. These proprietary materials were developed
to extend the erosion/corrosion
performance and reliability of the
Model A9 pump in the most difficult
applications.
WCD4™ – Wilfley’s improved CD4MCu duplex stainless steel offers 40% higher hardness, 42%
increased tensile strength, 65%
increase in yield strength, resulting
in a lower wear rate and higher corrosion resistance than the industry
standard CD4MCu.
MAXALLOY® 5A – is a proprietary
high-chrome hard iron providing
material hardness at a minimum of
720 HBN with a tensile strength of
110,000 PSI for the most difficult
abrasive services.
MAXALLOY® 10 – is a proprietary
high-chrome iron for applications
where both erosive and corrosion
wear. It offers a material hardness
of 365-420 HBN and can be applied
in low- pH applications.
Alloy C Max – is a Wilfley specially
processed proprietary material that
offers a 70% better corrosion performance than the equivalent standard Alloy C.
Alloys specially engineered to meet your needs
9
Item
Number
Item
Name
Ductile Iron
316SS
Material
CD4MCu
WCD4TM
Power End
2A
2B
Bearing Frame
Frame Bracket
2D
2E
2K
3B
3E
3F
3G
Frame Foot
Inboard Bearing Cover
Oil Sight Glass
Shaft
INPRO® VBXS Oil Seal
Bearing Locknut
Outboard Bearing
Ductile Iron
316SS
Glass/Steel
SAE43402
303SS
Steel
Double-Row Deep Groove3
3H
3M
Seal
O-ring, Bearing Carrier
Inboard Bearing
Viton®
Single-Row Deep Groove
Drylock II®
Wet End
9
10
11
12
14
16
17
1.
2.
3.
4.
Cap Screw
O-ring, Seal Housing
Case Plate
Case Gasket
Expeller
Impeller
Casing
Alloy 20
Ductile Iron
Ductile Iron1
Ductile Iron
316SS
Ductile Iron
316SS
Ductile Iron
Ductile Iron
Ductile Iron
316SS
316SS
316SS
CD4MCu
18-8
Viton® 4
CD4MCu
Gylon®
CD4MCu
CD4MCu
CD4MCu
WCD4TM
Alloy 20
WCD4TM
Alloy 20
WCD4TM
WCD4TM
WCD4TM
Alloy 20
Alloy 20
Alloy 20
CD4MCu Optional
316SS, Nitronic 50, Ferralium 255 Optional
2x Single-Row Angular Contact Optional
Kalrez, Teflon-Coated Viton®, EPDM Optional
10
Model A9 Options and Engineering Specials
Features
Options
Heavy-duty bearings
Extreme-duty bearings (F2, F3, F4)
Engineered Specials
Oil-lubricated bearings
Grease lub.
Labyrinth bearing seal (303SS)
Magnetic bearing seal
Frame, adapter, and bearing carrier
material:
Ductile iron
Adapter material:
316SS/CD4
Frame with 2 oil level sight glasses
O-Ring material:
Viton
Oil cooling provisions
Kalrez®, Teflon® encapsulated
Wet end material:
G30, HB, CW-2M
DI, 316SS, A20, WCD4, High Nickel
Alloy, Max5/Max8
Wet end without connections
1
⁄2” NPT case drain connection
Steam jacket for case
Steam jacket for SSR housing
1
150 lb. raised faced flanges
300 lb. raised faced flanges
150/300 lbs. flat faced flanges
Base plate material:
Fabricated steel, cast iron
Nonmetallic, stainless steel
Special fabrications
DryLock® II seal (type A1, A2)
Mechanical seal
Flush connections:
Seal, expeller (& drain)
1
⁄4” NPT expeller cavity drain
⁄4” NPT gauge connection
Packing
Flushing hardware
Special Modifications
Wilfley is dedicated to manufacturing pumps that meet your special
needs.
Wilfley routinely accommodates
and engineers solutions for special
requests such as for pumps with
steam jackets, thermal probe sensors on cases, flush ports, special
drain plugs and drain valves.
Special motor and drive configurations with pumps mounted on common bases can be supplied with
either fabricated, cast or with nonmetallic base options.
Pump with vibration monitoring, thermal probes for temperature
monitoring, steam jackets, and flush/drain system for shutdown.
11
AA-6
AB-6
1.5x1-6 3x1.5-6
AC-6
3x2-6
Frame 2
AA-8
A50-8
1.5x1-8 3x1.5-8
Frame 3
Frame 4
A60-8
A70-8
A05-10 A50-10 A60-10 A70-10 A80-10 A20-13 A30-13 A40-13 A40-13 A80-13 A80-13 A90-13 A110-15 A110-15 A120-17 A120-17
3x2-8
4x3-8
2x1-10 3x1.5-10 3x2-10
4x3-10
6x4-10 3x1.5-13 3x2-13
4x3-13 4x3-13H 6x4-13 6x4-13H 8x6-13
8x6-15 8x6-15H 10x8-17 10x8-17H
General
lbs
145
150
170
145
305
315
325
290
295
310
335
420
440
450
480
480
520
520
960 1,100 1,100 1,250 1,250
kg
Max.
°F
Working
°C
Temp.
Max.
psi
Working
Pressure kPa
Max.
in.
Solids
mm
Size
66
68
77
66
138
143
147
132
134
141
152
190
200
204
218
218
236
236
435
Pump
Weight
1
5
6
499
400
400
400
400
205
205
205
205
300
300
300
300
1,015
⁄16
3
499
⁄4
1
1,015
⁄4
6
⁄16
1
8
6
5
⁄4
1
⁄4
6
⁄8
3
10
1
⁄4
6
1,015
⁄8
3
10
⁄8
3
10
⁄8
3
10
⁄8
3
10
1
⁄4
6
⁄8
3
10
⁄8
3
10
10
⁄8
3
10
⁄8
3
10
1
⁄2
13
⁄2
⁄2
1
1
13
13
⁄2
1
13
Shaft
Diameter
at
Impeller
in.
1.00
1.25
1.625
2.25
mm
25.4
31.8
41.3
57.2
Diameter in.
at Sleeve mm
Diameter in.
at
Coupling mm
Diameter in.
between
Bearings mm
in.
Shaft
Overhang mm
1.375
1.530
1.938
2.625
34.9
38.9
49.2
66.7
0.875
1.125
1.625
2.375
22.2
28.6
41.3
60.3
2.00
2.60
2.84
4.3
50.8
66.0
72.1
109.2
6.45
6.76
7.83
10.29
163.8
171.8
198.8
261.4
in.
3.14
7.79
6.63
9.99
mm
79.8
197.8
168.4
253.7
Heavy Duty
Radial Bearing
6308
6311
6312
6319
Heavy Duty
Thrust Bearing
5208A
5310A
5312A
7319BECB
Extreme Duty
Radial Bearing
N/A
6311
21312E
21319E
Extreme Duty
Thrust Bearing
N/A
7310BECB
7312BECB
7319BECB
Bearing
Span
567
1,015
⁄8
3
567
Bearings
⁄2
1
13
Construction Details
Frame 1
12
Dimensions
Pump Dimensions
Dimensions in inches (millimeters)
Dimension
Designation
Frame Size
1
2
3
4
Pump
Size
CP
D
X
Y
U
HT
AA
1.5x1-6
17.5 (445)
5.25 (133)
6.5 (165)
4 (102)
0.875 (22)
3.75 (95)
AB
3x1.5-6
17.5 (445)
5.25 (133)
6.5 (165)
4 (102)
0.875 (22)
3.75 (95)
AC
3x2-6
17.5 (445)
5.25 (133)
6.5 (165)
4 (102)
0.875 (22)
3.75 (95)
AA
1.5x1-8
17.5 (445)
5.25 (133)
6.5 (165)
4 (102)
0.875 (22)
3.75 (95)
A50
3x1.5-8
23.5 (597)
8.25 (210)
8.5 (216)
4 (102)
1.125 (29)
3.75 (95)
A60
3x2-8
23.5 (597)
8.25 (210)
9.5 (242)
4 (102)
1.125 (29)
3.75 (95)
A70
4x3-8
23.5 (597)
8.25 (210)
11 (280)
4 (102)
1.125 (29)
3.75 (95)
A05
2x1-10
23.5 (597)
8.25 (210)
8.5 (216)
4 (102)
1.125 (29)
3.75 (95)
A50
3x1.5-10
23.5 (597)
8.25 (210)
8.5 (216)
4 (102)
1.125 (29)
3.75 (95)
A60
3x2-10
23.5 (597)
8.25 (210)
9.5 (242)
4 (102)
1.125 (29)
3.75 (95)
A70
4x3-10
23.5 (597)
8.25 (210)
11 (280)
4 (102)
1.125 (29)
3.75 (95)
A80
6x4-10
23.5 (597)
10 (254)
13.5 (343)
4 (102)
1.125 (29)
3.75 (95)
A20
3x1.5-13
23.5 (597)
10 (254)
10.5 (266)
4 (102)
1.625 (41)
3.75 (95)
A30
3x2-13
23.5 (597)
10 (254)
11.5 (292)
4 (102)
1.625 (41)
3.75 (95)
A40
4x3-13
23.5 (597)
10 (254)
12.5 (318)
4 (102)
1.625 (41)
3.75 (95)
A40
4x3-13H
23.5 (597)
10 (254)
12.5 (318)
4 (102)
1.625 (41)
3.75 (95)
A80
6x4-13
23.5 (597)
10 (254)
13.5 (343)
4 (102)
1.625 (41)
3.75 (95)
A80
6x4-13H
23.5 (597)
10 (254)
13.5 (343)
4 (102)
1.625 (41)
3.75 (95)
A90
8x6-13
33.875 (860)
14.5 (368)
16 (406)
6 (152)
2.375 (60.33)
3.75 (95)
A110
8x6-15
33.875 (860)
14.5 (368)
18 (457)
6 (152)
2.375 (60.33)
3.75 (95)
A110
8x6-15H
33.875 (860)
14.5 (368)
18 (457)
6 (152)
2.375 (60.33)
3.75 (95)
A120
10x8-17
33.875 (860)
14.5 (368)
19 (483)
6 (152)
2.375 (60.33)
3.75 (95)
A120
10x8-17H
33.875 (860)
14.5 (368)
19 (483)
6 (152)
2.375 (60.33)
3.75 (95)
HD
HE
Base Dimensions (not for construction)
Dimensions in inches (millimeters)
Frame
Base
Size
1
2, 3
139
143T-184T
148
213T-256T
HA
(MAX)
80M-90L
HB
15 (381)
39 (991)
9 (229)
4.5 (114)
48 (1219)
10.5 (267)
6 (152)
153 284TS-326TS 180M-180L 21 (533)
53 (1346)
12.88 (327)
245
143T-184T
100L-132M 15 (381)
45 (1143)
252
213T-215T
160M-180L 18 (457)
52 (1321) 12.381(3141) 14.132(3592)
258
254T-286T
200L
21 (533)
58 (1473)
HF
HG
(MAX)
HH
HL
HP
36.5 (927)
3.75 (95)
0.75 (19)
4.5 (114)
1.25 (32)
45.5 (1156) 4.13 (105)
0.75 (19)
4.5 (114)
1.25 (32)
7.5 (191) 50.5 (1283) 4.75 (121)
0.75 (19)
4.5 (114)
1.25 (32)
12 (305 ) 13.75 (349 ) 4.5 (114) 42.5 (1080) 3.75 (95)
0.75 (19)
4.5 (114)
1.25 (32)
49.5 (1257) 4.13 (105)
0.75 (19)
4.5 (114)
1.25 (32)
131(3531) 14.752(3752) 7.5 (191) 55.5 (1410) 4.75 (121)
1.00 (25)
4.5 (114)
1.25 (32)
1
1
2
2
6 (152)
264
324TS-365T 225S-225M 21 (533)
64 (1626) 13.88 (353 ) 14.75 (375 ) 7.5 (191) 61.5 (1562) 4.75 (121)
1.00 (25)
4.5 (114)
1.25 (32)
268
404T-405TS
26 (660)
68 (1727) 14.881(3781) 14.882(3782) 9.5 (241) 65.5 (1664) 4.75 (121)
1.00 (25)
4.5 (114)
1.25 (32)
280
405T-449TS 280S-280M 26 (660)
80 (2032) 15.881(4031) 15.882(4032) 9.5 (241) 77.5 (1969) 4.75 (121)
1.00 (25)
4.5 (114)
1.25 (32)
380
398
1.
2.
IEC
Motor
132M-160L 18 (457)
368
4
NEMA
Motor
284T-286T
324T-405T
250M
1
2
2
26 (660)
68 (1727)
19.25 (489)
9.5 (241) 65.5 (1664) 4.75 (121)
1.00 (25)
4.5 (165)
1.25 (32)
200L-250M 26 (660)
80 (2032)
19.25 (489)
9.5 (241) 77.5 (1969) 4.75 (121)
1.00 (25)
4.5 (165)
1.25 (32)
98 (2489)
19.25 (489)
9.5 (241) 95.5 (2426) 4.75 (121)
1.00 (25)
4.5 (165)
1.25 (32)
180L
444T-449TS 280S-315L
D=8.25 (210)
D=10 (254)
1
26 (660)
The dimensions listed above conform to ASME
B73.1 specifications and apply to fabricated and
nonmetallic base plates only. Dimensions are different for iron bases.
These dimensions are not for construction. Certified dimension prints are available for your specific
installation.
13
All dimensions printed in black are in inches and
those in red are the approximate equivalent in millimeters.
Flanges are drilled to match ASME B16.5 150lbs.
General Installation Recommendations
Ordering Information
Choosing Pump Location
Alignment
Wilfley pumps are engineered to
operate in compliance with your
specifications. Careful evaluation
of pumping conditions is needed to
provide accurate pump recommendations and quotations.
The following recommendations
may be helpful when choosing the
best location for your pump:
The pump and motor are aligned
at the factory before shipment. Realignment may be necessary after
the complete unit has been leveled
on the foundation and after the foundation bolts have been tightened.
Explicit directions for checking and
aligning the pump components may
be found in the Hydraulic Institute
Standards.
•
Locate the pump as close to
the liquid source as practical
so that the suction pipe is short
and direct with a minimum of elbows, fittings and valves.
•
Place the pump in a location so
that the unit is accessible for
inspection during operation as
well as for maintenance operations involving removal and disassembly.
This list will help establish
specific pumping conditions:
•
•
•
•
•
•
•
•
•
•
Liquid
Specific Gravity (of pumpage)
Percent solids (if any)
Capacity (flow rate)
Total head (pressure)
NPSH available
Temperature
Viscosity
Maximum suction pressure
Minimum suction pressure
Foundation
The foundation should be sufficiently substantial to absorb any vibration and to form a permanent, rigid
support. A concrete foundation on a
solid base is satisfactory. Foundation bolts of the proper size should
be embedded in the concrete located by the outline drawing.
Piping
Both suction and discharge pipes
should be supported independently
near the pump so that, when the
flange bolts are tightened, no strain
will be transmitted to the casing.
A check valve should be installed in
the discharge line to prevent fluid
from flowing back through the pump
while it is shut down. Valves should
be installed in both discharge and
suction lines to isolate the pump
during maintenance.
Care must be taken in sizing and
locating suction piping to prevent
cavitation.
14
REPRESENTATION
ALL AROUND THE
WORLD
VISIT
.WILFLEY.COM
WWW
A.R. Wilfley and Sons, Inc.
7350 E. Progress Place, Suite #200
Englewood, CO 80111
303-779-1777
1-800-525-9930
FAX 303-779-1277
[email protected]
A9 Technical Handbook 1.1 (en)
February 2013 • © A.R. Wilfley and Sons, Inc.