P8/PV8 Maintenance Manual - Csidesigns.com

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Section 2 WILDEN PUMP DESIGNATION SYSTEM P8/PV8 METAL 51 mm (2") Pump Maximum Flow Rate: 675 LPM (178 GPM) LEGEND P8 / XXXXX / XXX / XX / XXX / XXXX MODEL O-RINGS VALVE SEAT VALVE BALLS DIAPHRAGMS AIR VALVE CENTER BLOCK AIR CHAMBERS WETTED PARTS & OUTER PISTON SPECIALTY CODE (if applicable) MATERIAL CODES MODEL P8 = PRO-FLO ® PV8 = PRO-FLO V WETTED PARTS AA = ALUMINUM/ALUMINUM HH = ALLOY C/ALLOY C SS = STAINLESS STEEL/ STAINLESS STEEL WW = CAST IRON/CAST IRON AIR CHAMBERS A = ALUMINUM C = PTFE COATED N = NICKEL-PLATED S = STAINLESS STEEL V = HALAR ® COATED ALUMINUM (P8 only) CENTER BLOCK A = ALUMINUM (PV8 only) C = PTFE COATED (PV8 only) N = NICKEL-PLATED (PV8 only) P = POLYPROPYLENE (P8 only) S = STAINLESS STEEL (PV8 only) AIR VALVE A = ALUMINUM (PV8 only) C = PTFE COATED (PV8 only) N = NICKEL-PLATED (PV8 only) P = POLYPROPYLENE (P8 only) S = STAINLESS STEEL (PV8 only) DIAPHRAGMS BNS = BUNA-N (Red Dot) BNU = BUNA-N, ULTRA-FLEX EPS = EPDM (Blue Dot) EPU = EPDM, ULTRA-FLEX FSS = SANIFLEX [Hytrel ® (Cream)] NES = NEOPRENE (Green Dot) NEU = NEOPRENE, ULTRA-FLEX PUS = POLYURETHANE (Clear) TEU = PTFE W/EPDM BACK-UP (White) TNU = PTFE W/NEOPRENE BACK-UP (White) TSU = PTFE W/SANIFLEX BACK-UP (White) VTS = VITON ® (White Dot) VTU = VITON ® , ULTRA-FLEX WFS = WIL-FLEX [Santoprene ® (Orange Dot)] XBS = CONDUCTIVE BUNA-N (Two Red Dots) VALVE BALL BN = BUNA-N (Red Dot) EP = EPDM (Blue Dot) FS = SANIFLEX [Hytrel ® (Cream)] FV = SANITARY VITON ® (Two White Dots) (for Saniflo USDA ONLY) NE = NEOPRENE (Green Dot) PU = POLYURETHANE (Brown) TF = PTFE (White) VT = VITON ® (White Dot) WF = WIL-FLEX [Santoprene ® (Orange Dot)] VALVE SEAT A = ALUMINUM BN = BUNA-N (Red Dot) EP = EPDM (Blue Dot) FS = SANIFLEX [Hytrel ® (Cream)] H = ALLOY C M = MILD STEEL NE = NEOPRENE (Green Dot) PU = POLYURETHANE (Clear) S = STAINLESS STEEL VT = VITON ® (Silver or White Dot) WF = WIL-FLEX [Santoprene (Orange Dot)] VALVE SEAT O-RING FS = FLUORO-SEAL TF = PTFE SPECIALTY CODES 0003 Spark free 0010 SS outer piston, spark free 0014 BSPT 0015 Spark free, BSPT 0023 Wing nuts 0030 Screen based 0033 Screen based, spark free 0036 Screen based, BSPT 0037 Screen based, spark free, BSPT 0039 Screen based, polyurethane screen 0044 Stallion ® , balls & seats ONLY 0070 Saniflo FDA 0075 Saniflo FDA, Stallion ® balls and seats ONLY 0079 Tri-clamp fittings, wing nuts 0080 Tri-clamp fittings ONLY 0100 Wil-Gard II 110V 0102 Wil-Gard II, sensor wires ONLY 0103 Wil-Gard II 220V 0104 Wil-Gard II 110V, spark free 0105 Wil-Gard II 220V, spark free 0108 Wil-Gard II 220V, BSPT 0109 Wil-Gard II 220V, spark free, BSPT 0120 Saniflo FDA, Wil-Gard II 110V 0330 Wing nuts, BSPT 0513 SS outer pistons NOTE: MOST ELASTOMERIC MATERIALS USE COLORED DOTS FOR IDENTIFICATION. NOTE: Not all models are available with all material options. Viton ® is a registered trademark of DuPont Dow Elastomers. Halar ® is a registered trademark of Solvay. WILDEN PUMP & ENGINEERING, LLC 2 WIL-10120-E-02
ection 3 How It Works—Pump & Air Section 3 HOW IT WORKS—PUMP The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show flow pattern through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke. FIGURE 1 The air valve directs pressurized air to the back side of diaphragm A. The compressed air is applied directly to the liquid column separated by elastomeric diaphragms. The diaphragm acts as a separation membrane between the compressed air and liquid, balancing the load and removing mechanical stress from the diaphragm. The compressed air moves the diaphragm away from the center of the pump. The opposite diaphragm is pulled in by the shaft connected to the pressurized diaphragm. Diaphragm B is on its suction stroke; air behind the diaphragm has been forced out to atmosphere through the exhaust port of the pump. The movement of diaphragm B toward the center of the pump creates a vacuum within chamber B. Atmospheric pressure forces fluid into the inlet manifold forcing the inlet valve ball off its seat. Liquid is free to move past the inlet valve ball and fill the liquid chamber (see shaded area). FIGURE 2 When the pressurized diaphragm, diaphragm A, reaches the limit of its discharge stroke, the air valve redirects pressurized air to the back side of diaphragm B. The pressurized air forces diaphragm B away from the center while pulling diaphragm A to the center. Diaphragm B is now on its discharge stroke. Diaphragm B forces the inlet valve ball onto its seat due to the hydraulic forces developed in the liquid chamber and manifold of the pump. These same hydraulic forces lift the discharge valve ball off its seat, while the opposite discharge valve ball is forced onto its seat, forcing fluid to flow through the pump discharge. The movement of diaphragm A toward the center of the pump creates a vacuum within liquid chamber A. Atmospheric pressure forces fluid into the inlet manifold of the pump. The inlet valve ball is forced off its seat allowing the fluid being pumped to fill the liquid chamber. FIGURE 3 At completion of the stroke, the air valve again redirects air to the back side of diaphragm A, which starts diaphragm B on its exhaust stroke. As the pump reaches its original starting point, each diaphragm has gone through one exhaust and one discharge stroke. This constitutes one complete pumping cycle. The pump may take several cycles to completely prime depending on the conditions of the application. HOW IT WORKS—AIR DISTRIBUTION SYSTEM The Pro-Flo ® patented air distribution system incorporates two moving parts: the air valve spool and the pilot spool. The heart of the system is the air valve spool and air valve. This valve design incorporates an unbalanced spool. The smaller end of the spool is pressurized continuously, while the large end is alternately pressurized then exhausted to move the spool. The spool directs pressurized air to one air chamber while exhausting the other. The air causes the main shaft/diaphragm assembly to shift to one side — discharging liquid on that side and pulling liquid in on the other side. When the shaft reaches the end of its stroke, the inner piston actuates the pilot spool, which pressurizes and exhausts the large end of the air valve spool. The repositioning of the air valve spool routes the air to the other air chamber. WIL-10120-E-02 3 WILDEN PUMP & ENGINEERING, LLC
Page 1 and 2: P8/PV8 Original Series METAL Pumps
Page 3: Section 1 CAUTIONS—READ FIRST! CA
Page 7 and 8: DIMENSIONAL DRAWINGS 19 mm (3/4") F
Page 9 and 10: PERFORMANCE P8 METAL PTFE-FITTED He
Page 11 and 12: PERFORMANCE PV8 METAL PTFE-FITTED H
Page 13 and 14: Section 6 SUGGESTED INSTALLATION Wi
Page 15 and 16: SUGGESTED OPERATION & MAINTENANCE O
Page 17 and 18: PUMP DISASSEMBLY Step 4 Step 5 Step
Page 19 and 20: AIR VALVE / CENTER SECTION DISASSEM
Page 21 and 22: AIR VALVE / CENTER SECTION DISASSEM
Page 23 and 24: GASKET KIT INSTALLATION Only P4 and
Page 25 and 26: EXPLODED VIEW & PARTS LISTING P8 ME
Page 27 and 28: EXPLODED VIEW & PARTS LISTING P8 ME
Page 29 and 30: EXPLODED VIEW & PARTS LISTING PV8 M
Page 31 and 32: EXPLODED VIEW & PARTS LISTING PV8 M
Page 33 and 34: WIL-10120-E-02 31 WILDEN PUMP & ENG
Page 35: WARRANTY Each and every product man

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