Allweiler SPF series - Pressure Relief Valve Malfunctions

Troubleshooting
Malfunction number
1234
5
6
7
8
Cause
Remedy
–– ––
X X X X Pump distorted
Check the pipe connections and pu mp
attachment.
–– ––
X
–––
Coupling elements worn
Replace the coupling elements.
–
X
–
XX
––
X Motor running on 2 phases
Check the fuse and replace it if
necessary.
Check the cable connections and
insulation.
Tab. 10 Pump trouble shooting list
8.2 Pressure relief v alve malfunctions
If malfunctions occur which are not specified in the following
table or cannot be traced back to the specified causes, please
consult the manufa cturer.
Possible malfunctions are identified by a number in t he follow-
ing table. This numb er identifies the respective ca use and rem-
edy in the troubleshooting list.
Malfunction
Number
Pumping pressure drops 1
Pressure relief valve does not open
2
Pressure relief valve does not close
3
Pressure relief valve rattles
4
Tab. 11 Malfunction/n umbe r assignment
Malfunction
number
12 34
Cause
Remedy
X
–––
Spring worn out
Install a new spring.
X
–––
Valve seat leaks Install a new valve cone.
–
X
––
Spring tension too high
Relieve the pressure on the spring by turning
the adjusting screw, then reset the pressure
relief valve.
–
X
––
Foreign particles in the valve
Remove the pressure relief valve.
Clean the internal parts.
Install the pressur
e relief valve.
–
X
––
Pump operating temperature t oo high
Consult the manufacture r.
––
X
–
Spring ha s no or insufficient tension
Reset the pressure relief valve.
––
X
–
Valve s
eat leaks
Rework
or replace the valve cone or valve
casi
ng.
–– –
X
Pressure relief valve rattles
Measure the excess pressure with the fitting on
the pressure side closed.
Reset the pressure relief va lve (opening
pressure 10% higher than the operating
pressure).
Tab. 12 Pressure rel ief valve troubleshooting list
626.0005 GB – 550 041 BA-2014.01 SPF s eries 27