32
EB 2623-1 EN
Malfunctions
Table 5:
Troubleshooting
Malfunction
Possible reasons
Recommended action
Jerky control
response
Increased friction, e.g. due to for-
eign particles between seat and
plug or in the stem guide on the
bonnet.
Î
Remove foreign particles.
Î
Replace damaged parts.
Slow control response
Control line blocked by dirt caus-
ing the flow through it to be re-
stricted.
Î
Clean the control line.
Downstream pressure
hunts
Regulator too large
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or install
a different sized regulator.
Pressure tapped at the wrong
place (regulator with external
control line).
Î
Reconnect the control line at another point.
Î
Do not connect the control line at pipe bends or
necks.
The restriction in the control line
for pressure tapping is missing.
Î
Install a restriction.
Loud noises
High flow velocity, cavitation.
Î
Check the sizing.
Î
Install larger regulator, if necessary.
Leakage at the inspection
bore
Defective operating diaphragm
Î
Replace damaged diaphragm.
Leakage at the dia-
phragm stem
Dirt in the seal of the actuator
casing and diaphragm stem
Î
Replace the diaphragm stem and actuator cas-
ing.
Red mark appears at the
diaphragm rupture indi-
cator.
Defective operating diaphragm
Î
Replace damaged diaphragm.
Risk of TÜV approval (based on AGFW worksheet FW 504) for Types 44-3 and 44-9 be
-
coming void.
Consult SAMSON's After-sales Service before you change parts or perform service or repair
work on TÜV-tested Type 44-3 and Type 44-9 Regulators.
NOTICE
!
Summary of Contents for 44-2
Page 42: ...42 EB 2623 1 EN...
Page 43: ...EB 2623 1 EN 43...
