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IOM
Model: FP 4
30
-
Sizes: 2"-6"
PI4PE09-430-UF
9. Monthly Inspection and Test
9.1
Complete Weekly Inspection.
9.2
During the monthly fire pump flow test, it shall be verified that the pressure relief valve is correctly adjusted and
set to relieve at the appropriate pressure and closes below the pressure setting
Abnormal Conditions - Troubleshooting
SYMPTOM PROBABLE
CAUSE
REMEDY
Filter screen (4) blocked.
Remove filter cap and
screen to clean. Filter might
be insufficient. See Note
below.
Pulsates or hunts.
Slowly adjust needle
valve (21) until pulsation
stops.
Needle valve (21) not
properly adjusted.
Factory set at ½ or 1½
open. Adjust.
Valve fails to regulate
Air trapped in main valve
cover.
Loosen cover tube fitting
at the highest point, allow
the air to escape and re-
tighten.
Insufficient inlet pressure.
Check/create inlet
pressure.
Valve fails to open
Pilot is adjusted to high.
Turn adjusting screw
CCW on
pilot (5).
Filter screen (4) blocked.
Remove filter cap and
screen to clean. Filter might
be insufficient. See Note
below.
Debris trapped in main
valve.
Remove and inspect
actuator assembly.
Check seat.
Check for foreign bodies.
Rinse at high flow-rate.
Diaphragm in main valve
is leaking.
Valve fails to seal inlet
pressure
Diaphragm in pilot valve
is leaking.
Open the valve cover,
inspect diaphragm.
If damaged, replace.
Note:
Mark “F” – Large Filter
In cases where the filter screen frequently becomes blocked, install a filter with filtration capacity of at least 80 mesh, 250 µ m.
10.
Difficulty in Performance
Where difficulty in performance is experienced, the manufacturer or his authorized representative should be contacted
if any field adjustment is to be made.
Содержание FP 430-UF
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