C E N T R I F U G A L P U M P S Technical Handbook ASME B7. 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 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 DryLock II static seal re-engineered for reliable sealing and available in a variety of material combinations Extreme Duty Bearings Option availavle for severe high horsepower applications Robust shaft design optimized to achieve lower L /D 4 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 Easy internal adjustments via external adjustment bolts Large sight glasses on both sides to verify oil level Heavy duty case design available in both 50 and 00 lbs. flanges Alloy shaft sleeve to fully isolate the shaft from any contact with the pumpage 2-piece bearing frame optimized for maximum horsepower capabilities Frame adapters available in duplex stainless steel, designed to protect the bearing unit from pumpage Case and expeller cavity drain options are available (not shown)
Wilfley Model A9 Chemical Processing Pumps ASME B7. 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 B7. requirements. It handles liquids that are highly corrosive and abrasive. Discharge sizes range from (25mm) to 8 (200mm) in diameter. Flow rates range to over 5,280 US- GPM (,200 m /hr). Traditionof Innovation and Quality Arthur Redman Wilfley was an inventor and entrepreneur. He began working on centrifugal pumps in 902. Wilfley s first commercially available pump was sold in 99 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 920. The Wilfley expeller continues to be the unique hallmark of Wilfley pumps. Arthur Redman Wilfley (860-927) Frame 2 Model A9 Chemical Pump
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) Seal cartridge offers easy adjustment to precisely set the seal opening Corrosion resistant composite ball housing reduces rotating mass and saves energy Pump Off/ Seal Closed Rotary and stationary seal components are available in a variety of materials DryLock II - Style A2 (For higher solids concentrations) 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 Toleranced bushing to limit leakage Seal drain 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 DryLock II - Style A Mechanical Seal (Straight Bore) 6
Model A9 Pump Capacities 60 Cycle Performance Frame Frame 2 Frame Frame 4 7
50 Cycle Performance Frame Frame 2 Frame 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), 04L (CF) and 6L (CFM). 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 CD- 4MCu 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 0,000 PSI for the most difficult abrasive services. MAXALLOY 0 is a proprietary high-chrome iron for applications where both erosive and corrosion wear. It offers a material hardness of 65-420 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 Material Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20 Power End 2A Bearing Frame Ductile Iron 2B Frame Bracket Ductile Iron 2D Frame Foot Ductile Iron 2E Inboard Bearing Cover 6SS 2K Oil Sight Glass Glass/Steel B Shaft SAE440 2 E INPRO VBXS Oil Seal 0SS F Bearing Locknut Steel G Outboard Bearing Double-Row Deep Groove H O-ring, Bearing Carrier Viton M Inboard Bearing Single-Row Deep Groove Seal Drylock II Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20 Wet End 9 Cap Screw 8-8 0 O-ring, Seal Housing Viton 4 Case Plate Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20 2 Case Gasket Gylon 4 Expeller Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20 6 Impeller Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20 7 Casing Ductile Iron 6SS CD4MCu WCD4 TM Alloy 20. CD4MCu Optional 2. 6SS, Nitronic 50, Ferralium 255 Optional. 2x Single-Row Angular Contact Optional 4. Kalrez, Teflon-Coated Viton, EPDM Optional 0
Model A9 Options and Engineering Specials Features Options Engineered Specials Heavy-duty bearings Extreme-duty bearings (F2, F, F4) Oil-lubricated bearings Labyrinth bearing seal (0SS) Frame, adapter, and bearing carrier material: Ductile iron Frame with 2 oil level sight glasses O-Ring material: Viton Wet end material: DI, 6SS, A20, WCD4, High Nickel Alloy, Max5/Max8 Wet end without connections Adapter material: 6SS/CD4 Kalrez, Teflon encapsulated G0, HB, CW-2M 2 NPT case drain connection Steam jacket for case Steam jacket for SSR housing Grease lub. Magnetic bearing seal Oil cooling provisions 4 NPT gauge connection 50 lb. raised faced flanges 00 lb. raised faced flanges 50/00 lbs. flat faced flanges Base plate material: Nonmetallic, stainless steel Special fabrications Fabricated steel, cast iron DryLock II seal (type A, A2) Mechanical seal Packing Flush connections: Seal, expeller (& drain) 4 NPT expeller cavity drain 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.
2 General Pump Weight Max. Working Temp. Max. Working Pressure Max. Solids Size Shaft Diameter at Impeller Diameter at Sleeve Diameter at Coupling Diameter between Bearings Shaft Overhang Bearing Span Bearings Heavy Duty Radial Bearing Heavy Duty Thrust Bearing Extreme Duty Radial Bearing Extreme Duty Thrust Bearing Frame Frame 2 Frame Frame 4 AA-6 AB-6 AC-6 AA-8 A50-8 A60-8 A70-8 A05-0 A50-0 A60-0 A70-0 A80-0 A20- A0- A40- A40- A80- A80- A90- A0-5 A0-5 A20-7 A20-7.5x-6 x.5-6 x2-6.5x-8 x.5-8 x2-8 4x-8 2x-0 x.5-0 x2-0 4x-0 6x4-0 x.5- x2-4x- 4x-H 6x4-6x4-H 8x6-8x6-5 8x6-5H 0x8-7 0x8-7H lbs 45 50 70 45 05 5 25 290 295 0 5 420 440 450 480 480 520 520 960,00,00,250,250 kg 66 68 77 66 8 4 47 2 4 4 52 90 200 204 28 28 26 26 45 499 499 567 567 F 400 400 400 400 C 205 205 205 205 psi 00 00 00 00 kpa,05,05,05,05 in. 6 4 4 5 6 4 4 4 mm 5 6 6 8 6 6 0 6 0 0 0 0 6 0 0 0 0 0 in..00.25.625 2.25 mm 25.4.8 4. 57.2 in..75.50.98 2.625 mm 4.9 8.9 49.2 66.7 in. 0.875.25.625 2.75 mm 22.2 28.6 4. 60. in. 2.00 2.60 2.84 4. mm 50.8 66.0 72. 09.2 in. 6.45 6.76 7.8 0.29 mm 6.8 7.8 98.8 26.4 in..4 7.79 6.6 9.99 mm 79.8 97.8 68.4 25.7 608 6 62 69 5208A 50A 52A 79BECB N/A 6 22E 29E N/A 70BECB 72BECB 79BECB 4 2 2 2 2 2 Construction Details
Dimensions Pump Dimensions Dimensions in inches (millimeters) Frame Size 2 4 Dimension Designation Pump Size CP D X Y U HT AA.5x-6 7.5 (445) 5.25 () 6.5 (65) 4 (02) 0.875 (22).75 (95) AB x.5-6 7.5 (445) 5.25 () 6.5 (65) 4 (02) 0.875 (22).75 (95) AC x2-6 7.5 (445) 5.25 () 6.5 (65) 4 (02) 0.875 (22).75 (95) AA.5x-8 7.5 (445) 5.25 () 6.5 (65) 4 (02) 0.875 (22).75 (95) A50 x.5-8 2.5 (597) 8.25 (20) 8.5 (26) 4 (02).25 (29).75 (95) A60 x2-8 2.5 (597) 8.25 (20) 9.5 (242) 4 (02).25 (29).75 (95) A70 4x-8 2.5 (597) 8.25 (20) (280) 4 (02).25 (29).75 (95) A05 2x-0 2.5 (597) 8.25 (20) 8.5 (26) 4 (02).25 (29).75 (95) A50 x.5-0 2.5 (597) 8.25 (20) 8.5 (26) 4 (02).25 (29).75 (95) A60 x2-0 2.5 (597) 8.25 (20) 9.5 (242) 4 (02).25 (29).75 (95) A70 4x-0 2.5 (597) 8.25 (20) (280) 4 (02).25 (29).75 (95) A80 6x4-0 2.5 (597) 0 (254).5 (4) 4 (02).25 (29).75 (95) A20 x.5-2.5 (597) 0 (254) 0.5 (266) 4 (02).625 (4).75 (95) A0 x2-2.5 (597) 0 (254).5 (292) 4 (02).625 (4).75 (95) A40 4x- 2.5 (597) 0 (254) 2.5 (8) 4 (02).625 (4).75 (95) A40 4x-H 2.5 (597) 0 (254) 2.5 (8) 4 (02).625 (4).75 (95) A80 6x4-2.5 (597) 0 (254).5 (4) 4 (02).625 (4).75 (95) A80 6x4-H 2.5 (597) 0 (254).5 (4) 4 (02).625 (4).75 (95) A90 8x6-.875 (860) 4.5 (68) 6 (406) 6 (52) 2.75 (60.).75 (95) A0 8x6-5.875 (860) 4.5 (68) 8 (457) 6 (52) 2.75 (60.).75 (95) A0 8x6-5H.875 (860) 4.5 (68) 8 (457) 6 (52) 2.75 (60.).75 (95) A20 0x8-7.875 (860) 4.5 (68) 9 (48) 6 (52) 2.75 (60.).75 (95) A20 0x8-7H.875 (860) 4.5 (68) 9 (48) 6 (52) 2.75 (60.).75 (95) Base Dimensions (not for construction) Dimensions in inches (millimeters) Frame Size Base NEMA Motor 2, 4 IEC Motor HA (MAX) HB HD HE HF HG (MAX) HH HL HP 9 4T-84T 80M-90L 5 (8) 9 (99) 9 (229) 4.5 (4) 6.5 (927).75 (95) 0.75 (9) 4.5 (4).25 (2) 48 2T-256T 2M-60L 8 (457) 48 (29) 0.5 (267) 6 (52) 45.5 (56) 4. (05) 0.75 (9) 4.5 (4).25 (2) 5 284TS-26TS 80M-80L 2 (5) 5 (46) 2.88 (27) 7.5 (9) 50.5 (28) 4.75 (2) 0.75 (9) 4.5 (4).25 (2) 245 4T-84T 00L-2M 5 (8) 45 (4) 2 (05 ).75 2 (49 2 ) 4.5 (4) 42.5 (080).75 (95) 0.75 (9) 4.5 (4).25 (2) 252 2T-25T 60M-80L 8 (457) 52 (2) 2.8 (4 ) 4. 2 (59 2 ) 6 (52) 49.5 (257) 4. (05) 0.75 (9) 4.5 (4).25 (2) 258 254T-286T 200L 2 (5) 58 (47) (5 ) 4.75 2 (75 2 ) 7.5 (9) 55.5 (40) 4.75 (2).00 (25) 4.5 (4).25 (2) 264 24TS-65T 225S-225M 2 (5) 64 (626).88 (5 ) 4.75 2 (75 2 ) 7.5 (9) 6.5 (562) 4.75 (2).00 (25) 4.5 (4).25 (2) 268 404T-405TS 250M 26 (660) 68 (727) 4.88 (78 ) 4.88 2 (78 2 ) 9.5 (24) 65.5 (664) 4.75 (2).00 (25) 4.5 (4).25 (2) 280 405T-449TS 280S-280M 26 (660) 80 (202) 5.88 (40 ) 5.88 2 (40 2 ) 9.5 (24) 77.5 (969) 4.75 (2).00 (25) 4.5 (4).25 (2) 68 284T-286T 80L 26 (660) 68 (727) 9.25 (489) 9.5 (24) 65.5 (664) 4.75 (2).00 (25) 4.5 (65).25 (2) 80 24T-405T 200L-250M 26 (660) 80 (202) 9.25 (489) 9.5 (24) 77.5 (969) 4.75 (2).00 (25) 4.5 (65).25 (2) 98 444T-449TS 280S-5L 26 (660) 98 (2489) 9.25 (489) 9.5 (24) 95.5 (2426) 4.75 (2).00 (25) 4.5 (65).25 (2). D=8.25 (20) 2. D=0 (254) The dimensions listed above conform to ASME B7. 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. All dimensions printed in black are in inches and those in red are the approximate equivalent in millimeters. Flanges are drilled to match ASME B6.5 50lbs.
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 recommendations and quotations. 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 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 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. 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. Alignment 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. 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. 4
REPRESENTATION ALL AROUND THE WORLD VISIT WWW.WILFLEY.COM A.R. Wilfley and Sons, Inc. 750 E. Progress Place, Suite #200 Englewood, CO 80 0-779-777-800-525-990 FAX 0-779-277 pumps@wilfley.com A9 Technical Handbook. (en) February 20 A.R. Wilfley and Sons, Inc.