Pulsafeeder PULSAtron Series MP EN - Manual (Page 25)

25
DIAPHRAGM REPLACEMENT
Refer to drawings in the back of the manual.
1. When replacing the diaphragm, it’s always a good idea to replace the
valve cartridges and other worn parts. A kit is available from your
supplier with all parts neces
sary to completely rebuild your pump’s
wet end. All your supplier needs to know is the “KOPkit No.” on your
pump’s nameplate to supply this kit.
2. Set pump stroke length to 0% and unplug the pump.
3. If you kept the shims from the original diaphragm or know the original
quantity you can avoid Step #4 for shimming the diaphragm and go
to Step #5.
4. Slide the diaphragm deflection plate onto the back of the diaphragm
stud, radius side towards the diaphragm. Next slide two shims onto
the diaphragm threaded stud and screw the diaphragm into the EPM
unit. Refer to Figure R. Turn diaphragm clockwise until deflection plate and shims are tight against solenoid shaft,
diaphragm stops turning. If there is a gap between the adaptor and diaphragm, repeat the procedure removing one
shim each time until the diaphragm just touches the adaptor or is slightly recessed.
5. Apply grease to areas of the diaphragm that contact the deflection plate or radius on the adaptor.
6. Screw the diaphragm into the EPM unit’s shaft with the deflection plate and appropriate number of shims in between.
7. Adjust stroke length to 50%. It is easier to do this if you temporarily turn the pump on. Place the pump head onto the
adaptor with valve flow arrows pointing up and install and tighten pump head screws. Tighten screws until pump head
pulls up against adaptor.
8. Adjust stroke length back to 100% for easier priming and place pump back into service.
VALVE REPLACEMENT
1. Flush pump to clean any chemical from pump head.
2. Unplug pump, release system pressure, and disconnect any tubing or piping.
3. Unscrew valve cartridges and discard. Also remove O-Rings down inside pump head.
4. Using new O-Rings, install new valve cartridges with stamped letters reading from top to bottom, and the arrow
pointing in the direction of flow. Hand-tighten only, do not use wrenches or pliers. This is especially important when
the pump head is SAN material.
5. Reconnect tubing or piping and reinstall the pump.
6. Check for leaks around newly installed fittings.