WILDEN PUMP & ENGINEERING, LLC
22
WIL-11100-E-05
A I R V A L V E / C E N T E R S E C T I O N D I S A S S E M B L Y
T o o l s R e q u i r e d :
•
3/16" Hex Head
Wrench
• Snap
Ring
Pliers
• O-Ring
Pick
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 fl uid to fl ow into a suitable container. Be aware of
hazardous effects of contact with your process fl uid.
The Wilden P400 and PV400 metal pumps utilize a revolutionary Pro-Flo
®
air
distribution system. Proprietary composite seals reduce the co effi cient of friction
and allow the P400 and PV400 to run lube-free. Constructed of acetal, polypropylene
or aluminum, the Pro-Flo
®
air distribution system is designed to perform in on/off,
non-freezing, non-stalling, tough duty applications.
Step 1
Using a 3/16" Hex wrench, loosen
air valve bolts.
Step 2
Remove muffl er plate and air valve
bolts from air valve assembly
exposing muffl er
gasket
for
inspection. Replace if necessary.
Step 3
Lift away air valve assembly
and remove air valve gasket for
inspection. Replace if necessary.
