Samson 44-7, Монтаж и эксплуатация

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32 EB 2723 EN
Malfunctions
Table 5: Troubleshooting
Malfunction Possible reasons Recommended action
Upstream pressure
fluctuates
Regulator or K
VS
/C
V
coefficient 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
diaphragm 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 indicator.
Defective operating diaphragm
Î
Replace damaged diaphragm.
Risk of TÜV approval (based on AGFW worksheet FW 506) for Types 44-4 and 44-8 be -
coming void.
Consult SAMSON's After-sales Service department before you change parts or perform ser-
vice or repair work on TÜV-tested Type 44-4 and Type 44-8 Regulators.
NOTICE
!