Pulsafeeder Pulsar Shadow - Manual (Page 25)

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7.2.2 Re-Priming the Pumphead
Leak Detection diaphragm systems
require special hydraulic priming
considerations to protect the
diaphragm from damage during
initial pump startup. Refer to
Appendix I, page 33 and review these
procedures carefully before re-
starting a PULSAR pump equipped
with a leak detection system.
Figure 15
Hydraulic Priming Procedure, for standard Composite (THY) and Solid (PTFE) diaphragms:
1. Disconnect the power source to the drive motor.
2. Relieve all pressure from the piping system and where possible allow liquid to enter the reagent
head assembly.
3. Remove the diagnostic window and fill the eccentric box with PULSAlube 7H hydraulic oil to the
proper level. Replace the diagnostic window.
4. Turn on the pump and adjust the stroke length to the maximum setting of 100%.
5. Fully depress and hold the PTP valve. After several minutes oil should begin to flow out of the
center diagnostic port. Continue to hold the valve down until the oil is clear of bubbles. The
pump is now primed. If oil fails to flow out of the diagnostic port, proceed to step 6.
6. Reset to the zero stroke length setting, and turn off the pump. Setting the pump to zero stroke
moves the piston forward to prevent diaphragm damage at startup.
7. Remove the PTP valve from the pumphead. Using a small plastic funnel, slowly pour oil into the
pumphead through the PTP valve port until full.
8. Replace the PTP valve, ensuring that the flat copper gasket and o-ring are properly in place.
9. Turn on the pump. Gradually raise the stroke to the full 100% setting. Fully depress and hold the
PTP valve. Oil should begin to flow out of the center diagnostic port. Continue to hold the valve
down until the oil is clear of bubbles. If oil fails to flow out of the diagnostics port, then
additional oil is required in the pumphead: repeat steps (6) and (7) above.
HYDRAULIC
PERFORMANCE
VALVE (HPV)