ASME B73.1ChemicalProcessingPump

C E N T R I F U G A L P U M P S

Technical Handbook

A9Model

Wilfley Model A9 Features and Benefits

Heavy duty case design available in both 150 and 300 lbs. flanges

Optimized hydraulics available in a large selection of alloys to meet your specific requirements

The new expeller provides increased dynamic sealing with lower power consumption and longer wear life

Case and expeller cavity drain options are available(not shown)

Robust shaft design optimized to achieve lower L3/D4 ratios to minimize deflections at seal faces for maximum seal life and reliability

DryLock II static seal re-engineered for reliable sealing and available in a variety of material combinations

Alloy shaft sleeve to fully isolate the shaft from any contact with the pumpage

Expeller/Seal flush capability

Stainless steel labyrinth oil seals to prevent contamination are identical on both inboard and outboard locations for ease in assembly and inventory

Convenient Lifting point

Extreme Duty Bearings

Large sight glasses on both sides to verify oil level

Easy internal adjustments via external adjustment bolts

2-piece bearing frame optimized for maximum horsepower capabilities

Frame adapters available in duplex stainless steel, designed to protect the bearing unit from pumpage

Option availavle for severe high horsepower

applications

3

Wilfley Model A9 Chemical Processing Pumps

ASME B73.1

Wilfley’s Model A9 pump series is conservatively designed and ro-bustly constructed to offer high reli-ability in the most difficult pumping applications.

The Model A9 is an end-suction, single stage centrifugal pump that meets or exceeds ASME B73.1 re-quirements. 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 US-GPM (1,200 m3/hr).

Traditionof Innovation andQuality

Arthur Redman Wilfley was an in-ventor 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 hydrau-lic 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.

Frame 2 Model A9 Chemical Pump

Arthur Redman Wilfley(1860-1927)

4

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 oper-ating.

Benefits include operation without rubbing seal contact, no heat gen-eration, 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 avail-able in a wide selection of commer-cially available single and double mechanical seals.

“When an ordinary pump is not enough”

Wilfley hydraulic seal in actual operation

5

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 bal-ance 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 prod-uct leakage.

The Drylock® II can be supplied as a total car-tridge assembly or individual components can be easily replaced in the field. Precise in-field adjustment is also easily accom-plished without the need of special tools.

Actuator Assembly

6

Wilfley Options Seal

Pump Running/Seal Open

Pump Off/Seal Closed

DryLock® II - Style A1

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

Seal flush capabilitywhen required(startup/shutdown)

Shaft sleeve positively isolates the shaft fromthe pumpage

Isolatedspring for reliable seal closure

Mechanical Seal(Straight Bore)

DryLock® II - Style A2(For higher solids concentrations)Rotary and

stationary seal components are available in a variety of materials

Seal drain

Seal housing with drip lip also available

Seal cartridge offers easy adjustment to precisely set the seal opening

Corrosion resistant composite ball housing reduces rotating mass and saves energy

Toleranced bushing to limit leakage

Mechanical Seal(Tapered Bore)

Flow interruptor

7

Model A9 Pump Capacities

60 Cycle Performance

Frame 1 Frame 3 Frame 4Frame 2

8

50 Cycle Performance

Frame 1 Frame 3 Frame 4Frame 2

Materials of Construction

9

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 metallur-gical staff has the knowledge and expertise to assist you in material selection. Wilfley maintains an ex-tensive library of pumping services and corrosion/abrasion data. Wilf-ley 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 cou-pons for testing in your particular application followed by a material deterioration analysis report.

Wilfley’s in-house metallurgical re-sources have developed unique materials to survive in the most hostile environments. These pro-prietary 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 CD-4MCu duplex stainless steel of-fers 40% higher hardness, 42% increased tensile strength, 65% increase in yield strength, resulting in a lower wear rate and higher cor-rosion 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 per-formance than the equivalent stan-dard Alloy C.

Alloys specially engineered to meet your needs

ItemNumber

ItemName

MaterialDuctile Iron 316SS CD4MCu WCD4TM Alloy 20

Power End2A Bearing Frame Ductile Iron2B Frame Bracket Ductile Iron1

2D Frame Foot Ductile Iron2E Inboard Bearing Cover 316SS2K Oil Sight Glass Glass/Steel3B Shaft SAE43402

3E INPRO® VBXS Oil Seal 303SS3F Bearing Locknut Steel3G Outboard Bearing Double-Row Deep Groove3

3H O-ring, Bearing Carrier Viton®

3M Inboard Bearing Single-Row Deep GrooveSeal

Drylock II® Ductile Iron 316SS CD4MCu WCD4TM Alloy 20Wet End9 Cap Screw 18-810 O-ring, Seal Housing Viton® 4

11 Case Plate Ductile Iron 316SS CD4MCu WCD4TM Alloy 2012 Case Gasket Gylon®

14 Expeller Ductile Iron 316SS CD4MCu WCD4TM Alloy 2016 Impeller Ductile Iron 316SS CD4MCu WCD4TM Alloy 2017 Casing Ductile Iron 316SS CD4MCu WCD4TM Alloy 20

1. CD4MCu Optional2. 316SS, Nitronic 50, Ferralium 255 Optional3. 2x Single-Row Angular Contact Optional4. Kalrez, Teflon-Coated Viton®, EPDM Optional

10

11

Model A9 Options and Engineering Specials

Features Options Engineered SpecialsHeavy-duty bearings Extreme-duty bearings (F2, F3, F4) Oil-lubricated bearings Grease lub.Labyrinth bearing seal (303SS) Magnetic bearing sealFrame, adapter, and bearing carrier material:Ductile iron

Adapter material:316SS/CD4

Frame with 2 oil level sight glasses Oil cooling provisionsO-Ring material:Viton

Kalrez®, Teflon® encapsulated

Wet end material:DI, 316SS, A20, WCD4, High Nickel Alloy, Max5/Max8

G30, HB, CW-2M

Wet end without connections 1⁄2” NPT case drain connectionSteam jacket for caseSteam jacket for SSR housing

1⁄4” NPT gauge connection

150 lb. raised faced flanges 300 lb. raised faced flanges 150/300 lbs. flat faced flangesBase plate material:Fabricated steel, cast iron

Nonmetallic, stainless steel Special fabrications

DryLock® II seal (type A1, A2) Mechanical seal PackingFlush connections:Seal, expeller (& drain)

1⁄4” NPT expeller cavity drain Flushing hardware

Special Modifications

Wilfley is dedicated to manufactur-ing pumps that meet your special needs.

Wilfley routinely accommodates and engineers solutions for special requests such as for pumps with steam jackets, thermal probe sen-sors on cases, flush ports, special drain plugs and drain valves.

Special motor and drive configura-tions with pumps mounted on com-mon bases can be supplied with either fabricated, cast or with non-metallic base options.

Pump with vibration monitoring, thermal probes for temperature monitoring, steam jackets, and flush/drain system for shutdown.

Frame 1 Frame 2 Frame 3 Frame 4AA-6 AB-6 AC-6 AA-8 A50-8 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

1.5x1-6 3x1.5-6 3x2-6 1.5x1-8 3x1.5-8 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

Pump Weight

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 1,250kg 66 68 77 66 138 143 147 132 134 141 152 190 200 204 218 218 236 236 435 499 499 567 567

Max. Working Temp.

°F 400 400 400 400°C 205 205 205 205

Max. Working Pressure

psi 300 300 300 300kPa 1,015 1,015 1,015 1,015

Max.SolidsSize

in. 3⁄16 1⁄4 1⁄4 5⁄16 1⁄4 1⁄4 3⁄8 1⁄4 3⁄8 3⁄8 3⁄8 3⁄8 1⁄4 3⁄8 3⁄8 3⁄8 3⁄8 3⁄8 1⁄2 1⁄2 1⁄2 1⁄2 1⁄2mm 5 6 6 8 6 6 10 6 10 10 10 10 6 10 10 10 10 10 13 13 13 13 13

ShaftDiameter

atImpeller

in. 1.00 1.25 1.625 2.25mm 25.4 31.8 41.3 57.2

Diameter at Sleeve

in. 1.375 1.530 1.938 2.625mm 34.9 38.9 49.2 66.7

Diameter at

Coupling

in. 0.875 1.125 1.625 2.375mm 22.2 28.6 41.3 60.3

Diameter between Bearings

in. 2.00 2.60 2.84 4.3mm 50.8 66.0 72.1 109.2

Shaft Overhang

in. 6.45 6.76 7.83 10.29mm 163.8 171.8 198.8 261.4

Bearing Span

in. 3.14 7.79 6.63 9.99mm 79.8 197.8 168.4 253.7

Bearings

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

Construction D

etails

12

Dimensions

Frame Size Dimension Designation

Pump Size CP D X Y U HT

1

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)

2

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)

3

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)

4

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)

Frame Size Base NEMA

MotorIEC

MotorHA

(MAX) HB HD HE HF HG (MAX) HH HL HP

1

139 143T-184T 80M-90L 15 (381) 39 (991) 9 (229) 4.5 (114) 36.5 (927) 3.75 (95) 0.75 (19) 4.5 (114) 1.25 (32)

148 213T-256T 132M-160L 18 (457) 48 (1219) 10.5 (267) 6 (152) 45.5 (1156) 4.13 (105) 0.75 (19) 4.5 (114) 1.25 (32)

153 284TS-326TS 180M-180L 21 (533) 53 (1346) 12.88 (327) 7.5 (191) 50.5 (1283) 4.75 (121) 0.75 (19) 4.5 (114) 1.25 (32)

2, 3

245 143T-184T 100L-132M 15 (381) 45 (1143) 121(3051) 13.752(3492) 4.5 (114) 42.5 (1080) 3.75 (95) 0.75 (19) 4.5 (114) 1.25 (32)

252 213T-215T 160M-180L 18 (457) 52 (1321) 12.381(3141) 14.132(3592) 6 (152) 49.5 (1257) 4.13 (105) 0.75 (19) 4.5 (114) 1.25 (32)

258 254T-286T 200L 21 (533) 58 (1473) 131(3531) 14.752(3752) 7.5 (191) 55.5 (1410) 4.75 (121) 1.00 (25) 4.5 (114) 1.25 (32)

264 324TS-365T 225S-225M 21 (533) 64 (1626) 13.881(3531) 14.752(3752) 7.5 (191) 61.5 (1562) 4.75 (121) 1.00 (25) 4.5 (114) 1.25 (32)

268 404T-405TS 250M 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)

4

368 284T-286T 180L 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)

380 324T-405T 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)

398 444T-449TS 280S-315L 26 (660) 98 (2489) 19.25 (489) 9.5 (241) 95.5 (2426) 4.75 (121) 1.00 (25) 4.5 (165) 1.25 (32)

1. D=8.25 (210)2. D=10 (254)

Pump DimensionsDimensions in inches (millimeters)

Base Dimensions (not for construction)Dimensions in inches (millimeters)

13

The dimensions listed above conform to ASME B73.1 specifications and apply to fabricated and nonmetallic base plates only. Dimensions are dif-ferent for iron bases.

These dimensions are not for construction. Certi-fied dimension prints are available for your specific installation.

All dimensions printed in black are in inches and those in red are the approximate equivalent in mil-limeters.

Flanges are drilled to match ASME B16.5 150lbs.

14

General Installation Recommendations

Ordering Information

Wilfley pumps are engineered to operate in compliance with your specifications. Careful evaluation of pumping conditions is needed to provide accurate pump recommen-dations and quotations.

This list will help establishspecific 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

Choosing Pump Location

The following recommendations may be helpful when choosing the best location for your pump:

• Locate the pump as close to the liquid source as practical so that the suction pipe is short and direct with a minimum of el-bows, fittings and valves.

• Place the pump in a location so that the unit is accessible for inspection during operation as well as for maintenance opera-tions involving removal and dis-assembly.

Foundation

The foundation should be sufficient-ly substantial to absorb any vibra-tion and to form a permanent, rigid support. A concrete foundation on a solid base is satisfactory. Founda-tion bolts of the proper size should be embedded in the concrete locat-ed by the outline drawing.

Alignment

The pump and motor are aligned at the factory before shipment. Re-alignment may be necessary after the complete unit has been leveled on the foundation and after the foun-dation bolts have been tightened. Explicit directions for checking and aligning the pump components may be found in the Hydraulic Institute Standards.

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.

A.R. Wilfley and Sons, Inc.

7350 E. Progress Place, Suite #200Englewood, CO 80111

303-779-1777

1-800-525-9930

FAX 303-779-1277

pumps@wilfley.com

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A9 Technical Handbook 1.1 (en) February 2013 • © A.R. Wilfley and Sons, Inc.