16
2 each, Ball Check D. 14
4 each, O-rings
Note:
Liquid end sizes GM0002~GM0050 metallic check valves are precision assembled at the factory.
Do not attempt to disassemble these cartridges.
4.4.3 GM0090~GM0500 LIQUID ENDS-PVC AND PVDF
1 each, Diaphragm Assembly
1 each, Oil Seal Bellows
2 each, Seat, Ball Check
4 each, O-rings
4.4.4 GM0090~GM0500 LIQUID ENDS-STAINLESS STEEL
1 each, Diaphragm Assembly
1 each, Oil Seal Bellows
2 each, Ball Check D.14
2 each, Ball Check D.22
4 each, O-rings
4.5 CORRECTIVE MAINTENANCE
BEFORE CARRYING OUT ANY SERVICING OPERATION ON THE PUMP OR PIPING, DISCONNECT
ELECTRICAL POWER FROM THE PUMP, AND TAKE THE NECESSARY STEPS TO ENSURE
THAT ANY HARMFUL LIQUID CANNOT COME INTO CONTACT WITH PERSONNEL. SUITABLE
PROTECTIVE EQUIPMENT MUST BE PROVIDED. BE SURE THAT THERE IS NO FLUID PRESSURE
IN THE PUMP LIQUID END AND PIPING.
Cleaning Fouled Check Valves
Check valve assemblies are designed to be self-cleaning and should seldom need servicing. Fouled check
valves can usually be cleaned by pumping a solution of mild detergent and warm water (if compatible with
liquid being pumped) for 15 minutes, followed by ushing with water.
Check Valve Replacement General
Before beginning work on the valve assemblies, make sure the suction and discharge shut-off valves are
closed and that pressure has been bled from the pump liquid end. When replacing the valves, be sure to
replace the valve O-rings. Pay close attention to the proper assembly and orientation of the check valves as
shown in each Liquid End gure. In the case of plastic check valves for liquid end size GM0090~GM0500, be
certain that the ball is placed on the sharp edge of the valve seat.
BE SURE TO FOLLOW INSTRUCTIONS CAREFULLY AND REFER TO THE APPRO-PRIATE FIGURE
WARNING
CAUTION
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