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PIPHPE-FP
© Copyright 2011-2021 Bermad CS Ltd. All Rights Reserved. The information contained in this document is subject to change without notice.
BERMAD shall not be liable for any errors contained herein
5.
Maintenance
The FP-3HC-0 valve is to be inspected, tested and maintained in accordance with the Maintenance Instructions of the plant, this
Maintenance Manual, as well as the Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems,
NFPA 25.
The following inspection procedure shall be performed in addition to any specific requirements of the NFPA 25 and also to any
requirements of the authorities having jurisdiction.
Any malfunction must be immediately corrected. The installing contractor or product supplier should be contacted regarding any
questions. It is recommended that the FP-3HC-0 relief valve be inspected, tested, and maintained by a qualified inspection service
5.1
Quarterly Inspection
5.1.1
Visually check for any evidence of damage or leak
5.1.2
The pressure gauge should show a pressure below that of the set pressure (see setting sticker on the valve cover)
5.1.3
Visually check for any obstructions in the discharge drain port
5.1.4
If a strainer is installed before the valve, clean or flush any accumulated debris within it.
5.2
Abnormal Conditions
Symptom
Probable Cause
Remedy
Leakage from
discharge/drain
port
High supply pressure
Check supply pressure gauge
Debris obstruction on seal
Flush the valve by releasing the adjusting screw
Worn or damaged seal
Replace seal (item 6, fig.2)
Valve fails open
Blocked internal trim
Disassemble valve and clear any obstructions
Blocked sensing port
Remove valve cover and diaphragm and clear any obstructions
Leakage shows
on valve cover
Damaged or worn diaphragm
Replace diaphragm
Loose diaphragm assembly
Tighten diaphragm holding nut (item 20, fig.2)