Samson 2333 series, Монтаж и эксплуатация

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EB 2552-1 EN 15
Maintenance
Troubleshooting (continued)
Malfunction Possible reasons Recommended action Comments
The required
downstream
pressure is not
reached
Strainer in the line in which
the pilot valve is installed is
clogged up
Clean strainer.
The required minimum differ-
ential pressure to operate the
regulator is not available
Raise upstream pressure or re-
duce downstream pressure
Set point range of the pilot
valve is too low
Convert or replace pilot valve.
Main valve seized up Clean main valve.
Install a shut-off valve instead of
the pilot valve. If the main valve
does not open when the shut-off
valve is opened, the main valve
has caused the malfunction.
Pilot valve seized up
Clean pilot valve. Clean inter-
nal control line used to tap the
downstream pressure.
Install a shut-off valve instead of
the pilot valve. If the main valve
does not open when the shut-off
valve is opened, the main valve
has caused the malfunction.
Needle valve installed be-
tween fixed restriction and
main valve is jammed or
closed.
Clean the needle valve. Check
setting (open).
Main valve is sized to be too
small (K
VS
/C
V
)
Resize the valve. Replace main
valve.
Regulator's
reaction is
sluggish
Strainer in the line in which
the pilot valve is installed is
clogged up.
Clean strainer.
Inside the pilot valve is
clogged up, impairing the
flow through the valve
Clean inside the pilot valve.
Needle valve installed be-
tween fixed restriction and
main valve is jammed.
Clean the needle valve. Check
setting (open).
The fixed restriction is
clogged up.
Clean fixed restriction.
Control line or Venturi noz -
zle blocked
Clean parts.
Improve steam conditioning, if nec-
essary.