SECTION 1 WILDEN PUMP DESIGNATION SYSTEM T or A8 / XXXX / XX / XX / XXX / (xxx) O-RINGS MODEL VALVE SEAT VALVE BALLS DIAPHRAGMS AIR VALVE CENTER BLOCK OR CENTER SECTION SPECIALTY AIR CHAMBERS OR CENTER SECTION CODE (IF APPLICABLE) WETTED PARTS MODEL T8 OR A8 PLASTIC...
SECTION 2 THE WILDEN PUMP — HOW IT WORKS The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show the flow pattern through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke. OUTLET OUTLET OUTLET...
SECTION 3 WILDEN MODEL T8 PLASTIC CAUTIONS – READ FIRST! TEMPERATURE LIMITS: CAUTION: Blow out air line for 10 to 20 seconds before Polypropylene 0°C to 79°C 32°F to 175°F attaching to pump to make sure all pipe line debris is PVDF –12°C to 107°C 10°F to 225°F...
SECTION 7A INSTALLATION – T8 PLASTIC AIR-OPERATED PUMPS The Model T8 Plastic (“Champ”) pump has a 5.08 cm (2") inlet be eliminated. In addition, pump efficiency can be adversely and 5.08 cm (2") outlet and is designed for flows to 590.5 lpm affected if proper attention is not given to elevation (see pump (156 gpm).
SECTION 7C OPERATING PRINCIPLES BEHIND ACCU-FLO™ PUMPS In Accu-Flo™ pump models, the standard air valve is replaced Although the speed of the pump is controlled electrically, the air with a two position, four-way solenoid valve that has a single pressure is important. Air pressure displaces the fluid, and if the operator and spring return.
SECTION 7F – AIR-CONTROLLED TROUBLESHOOTING Pump will not run or runs slowly. occur. Replace ball check valves and O-rings with the proper elastomers. Check air inlet screen and air filter for debris. Check to make sure all suction connections are air tight, Check for sticking air valve, flush air valve in solvent.
SECTION 8A MODEL T8 PLASTIC DIRECTIONS FOR DISASSEMBLY/REASSEMBLY CAUTION: Before any maintenance or repair is attempted, the compressed air line to the pump should be disconnected and all air pressure allowed to bleed from the pump. Disconnect all intake, discharge, and air lines. Drain the pump by turning it upside down and allowing any fluid to flow into a suitable container.
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Step 4. Figure 4 Step 5. Figure 5 Remove the discharge valve balls, seats (Figure 4) from atop Remove the two small clamp bands, which fasten the intake the liquid chambers and inspect for nicks, gouges, chemical manifold to the liquid chambers, and lift away the intake mani- attack or abrasive wear.
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Step 9. Figure 9 Step 10. Figure 10 Lift liquid chamber away from center section expose Using an adjustable wrench, or by rotating the diaphragm by diaphragm and outer piston. (Figure 9) hand, remove the diaphragm assembly. (Figure 10) Step 11A. Figure 11A Step 11B.
SECTION 8B AIR VALVE / CENTER BLOCK DISASSEMBLY The air valve assembly consists of both the air valve body and piston and the center block. The unique design of the air valve relies only on differential pressure to effect the diaphragm shift. It is reliable and simple to maintain.
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Small nicks can usually be dressed out and the piston returned P/N 08-3300-07 Bronze Bushing can be pressed to service. Make sure that the guide pin is straight and smooth into a stainless steel or or the piston will not move freely in the cylinder. Clean out anti- cast iron center section.
SECTION 8C REASSEMBLY HINTS & TIPS • Ensure proper alignment on the sealing surfaces of intake ASSEMBLY: and discharge manifolds. Upon performing applicable maintenance to the air distribution • Liquid chambers are easier to attach when the diaphragm is system, the pump can now be reassembled. Please refer to the inverted.
SECTION 8D GASKET KIT INSTALLATION Only Teflon ® -fitted T8 PVDF and polypropylene pumps come stan- diaphragm bead and all mating surfaces. If necessary, smooth or dard with expanded Teflon ® Gasket Kits (P/N 08-9501-99 for deburr all sealing surfaces. Mating surfaces must be properly PVDF and 08-9500-99 for polypropylene).
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