13
6.4 Troubleshooting
PROBLEM POSSIBLE REASON
ACTION
Valve leaks into the
environment.
1. Sleeve breakage.
2. End flanges loosely tightened.
1. Change and make adjustment of sleeve
2. Tighten the flange end screws
Leakage or flow
through the valve
when valve should be
closed.
Sleeve breakage.
(models PVE, PVS): check by the plug -
change and make adjustment of sleeve
Sleeve is not closed with
sufficient squeeze.
Manual valves - turn the hand wheel more
tight.
Pneum. and hydr. actuators - check the
supply pressure for cylinder; if the pressure
is too low, the sufficient squeeze for the
sleeve cannot be reached. Check the
compactness of the cylinder seals.
Wrong adjustment of the sleeve.
Make the adjustment
Shorter lifetime of the
sleeve than before.
Sleeve is not closed with
sufficient squeeze.
Manual valves - turn the hand wheel more
tight.
Pneum. and hydr. actuators - check the
supply pressure for cylinder; if the pressure
is too low, the sufficient squeeze for the
sleeve cannot be reached. Check the
compactness of the cylinder sealings.
Wrong adjustment of the sleeve.
Make the adjustment.
1. Pneum. valves: wrong
adjustment of the end cushioning
in front end-block of cylinder.
2. Wrong adjustment of the
pneum. spring.
1. End cushioning in front end-block of
cylinder should be fully open.
2. Check adjustment of pneumatic spring .
Changes in customer process e.g.
∗
composition of medium /
temperature
∗
flow capacity
Check the best rubber qualityl
with
FLOWROX.
Select another valve size with FLOWROX
(particularly valves with positioners).
Sleeve is flapping
and/or flow capacity
is not sufficient.
Vacuum or pressure shocks in
pipeline, rubber has hardened
and does not open totally.
Chec
that the opening tags are fixed.
In case you cannot find the solution to your problem in the above table, please turn to
the nearest Flowrox representative. The serial number and type identification of the
valve in question will help getting the prompt answer.
To Next Page
Loading...
Need help?
General