Operating instructions

Page 31
ProMinent
®
4.3 Replacement of wearing parts
Replacing diaphragm (see exploded diagrams in appendix!)
WARNING
• Only EX pump: Please thoroughly read the chapter “Important Additions for Metering
Pumps in the EX Area” of the “General Operating Instructions ProMinent Motor Metering
Pumps and Hydraulic Accessories”!
• Replacement of the diaphragm (see exploded view in the annex).
IMPORTANT
• Flush liquid end first in the case of hazardous media. For this purpose, force water or a
suitable flushing agent through the intake connection of the liquid end with a wash
bottle.
• In case of any replacement, genuine replacement parts are to be used!”
왘 Set the stroke length to zero when the pump is running. Switch the pump off.
왘 Unscrew the diaphragm rupture sensor from the dosing head.
왘 Slacken the six screws from the dosing head and remove the dosing head with screws.
왘 Then release the diaphragm from the driving rod by jerking anti-clockwise and unscrew.
왘 Screw on the new diaphragm onto the driving rod until it has a tight fit.
왘 Install the dosing head with the screws so that the suction connector is pointing downwards
(observe the flow direction / arrow marking on the valves).
왘 Screw the diaphragm rupture sensor into the dosing head.
왘 Switch on the pump.
왘 Adjust th e stroke length to 100 %, screw in the screws and tighten cross-wise with
7.5 ±0,5 Nm.
왘 Check the pump for leaks at max. pressure.
NOTE
The tightening torque of the liquid end screws should be rechecked after 24 hours of
operation.
The tightening torques of the liquid end screws should be checked every 3 months for the
PVT material version.
Start-up/Maintenance
Fig. 16
P_SI_0029
2
3
A
1
1 Diaphragm
2 Backplate
3 Clip
ATolerance range
BA_SI_036_06_10_EN.p65 08.06.2010, 11:38 Uhr31