Malfunctions
User manual for HON R100 gas pressure regulator with HON P095NG pilot
43
Malfunction
Possible causes
Correction
The outlet pressure increases during
zero flow.
A component is leaking.
Perform maintenance.
High‐frequency fluctuations at the set
pressure.
Recognized as: Outlet pressure fluctu‐
ation < 0.2 sec.
If this fluctuation does not disappear as the
discharge increases, the cause can be traced
back to the interaction between the process
and the regulator.
Check the regulator settings.
Low‐frequency fluctuations at the set
pressure.
Recognized as: Outlet pressure fluctu‐
ation > 0.2 sec.
Interaction between the process and the
regulator.
Solution 1: Check the regulator settings.
Solution 2: If solution 1 does not fix the prob‐
lem, you can try to replace the pilot spring with
a stiffer one (so that you can set a higher outlet
pressure).
The maintenance intervals are too long.
Solution 3: Another possible reason for the
fluctuations is increased friction between the
regulating system’s moving parts. This includes
factors such as the dynamic seals aging and dirt
accumulating in the guides, and can only be
detected by performing maintenance on a
regular basis. In certain cases, there will be an
audible indication when guides are soiled or
unable to move freely, i.e., in the form of noise.
