Pulsafeeder PulsaPro 900 EN - Manual (Page 37)

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7.5.2 PTP Removal, Cleaning, and Reinstallation
Any accumulation of solids can cause the valve to malfunction.
1. Disconnect the power source to the drive motor (e.g., lockout/tagout the motor disconnect).
2. Relieve all pressure from the piping system.
3. Slowly unscrew the valve to gradually relieve any residual hydraulic system pressure.
O IL MAY LEAK OUT FROM AROUND THE PTP VALVE . T AKE APPROPRIATE
MEASURES TO CAPTURE AND CONTAIN IT .
4. Remove the valve and clean it by soaking in a petroleum based solvent.
Valve operation can be confirmed by blowing air through it in both directions and listening
for the “click” sound of disk-seat contact in both directions.
5. Verify that the copper gasket is installed at the bottom of the threaded hole in the pump head.
The copper gasket need not be replaced provided that it is sound and undamaged.
The elastomeric gasket around the upper portion of the valve assembly may be likewise re-
used.
This valve is not repairable and must be replaced if it continues to malfunction after
cleaning.
Figure 18a
Copper Gasket
O-Ring
PTP BUTTON