GB
MU1H-1201 GE23 R0320
5
7
Troubleshooting
8
Spare Parts
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Disturbance
Cause
Remedy
No or too small water flow rate
Stop valve in front of or below the check
valve is not fully opened
Open shut-off valves
Valve cone jams in the guide
Replace the valve cone
Rise in pressure in the prepressure
section
Not sealing properly in the prepressure
section
Replace the valve cone and the lip
sealing ring
Sealing surfaces soiled or worn
Clean the sealing elements, replace if
necessary
Beating sounds
The check valve is over-dimensioned
Call Technical Customer Service
