Repair - ProMinent Pneumados PNDb Series Operating Instructions Manual

Troubleshooting / Remedy / Repair
Customer service
Page 24
Check whether the holes of the diaphragm are flush with those of the pump housing
If not, start the pump and set the stroke length to 100%.
With the pump in operation, slowly turn the diaphragm (3) clockwise until the 4 holes of the
diaphragm are flush with those of the pump housing (6).
Hold the diaphragm (3) in this position, set the stroke length to 0%, and stop the pump.
Unscrew the diaphragm (3) again.
Position the end disc (4) on the pump housing (6).
CAUTION
• The leakage hole must show to the bottom in the later installation position of the pump!
Insert the diaphragm (3) into the end disc (4).
Hold the end disc (4) and tighten the diaphragm (3) clockwise until it is seated firmly (the turning
resistance of the return spring becomes noticeable).
CAUTION
• Do not excessively turn the diaphragm (3)!
Position the liquid end (2) with the screws (1) onto the diaphragm (3) and the end disc (4) (the
suction connection must show to the bottom in the later installation position of the pump)
Loosely insert the screws (1) and then tighten crosswise (tightening torques see below).
Tightening torques for screws: 4.5 to 5 Nm
13

Repair

WARNING
Metering pumps may only be repaired by trained and authorised persons!
Contact your competent customer service or your competent ProMinent branch or agency.
NOTE
Only return the metering pump for repair in a cleaned condition and with rinsed liquid end!
If possible, please include a short description of the defect including conditions of use and
operating hours!
WARNING
• Only return the metering pump for repair in a cleaned condition and with rinsed delivery
unit! If despite thorough emptying and cleaning of the pump any safety precautions
should be required, the necessary information must be listed in the Clearance!
The Clearance is material part of the inspection/repair order.
A maintenance or repair will only be made if the Clearance has been correctly and fully
completed by authorised and qualified personnel of the operator.
The form is enclosed in the annex or can be downloaded from www.prominent.com.
• Pumps for radioactive media may not be shipped!
ProMinent ®