7
Type V/20-2
(See Figure 9)
a. Unscrew the outlet connection (key 9).
b. Unscrew the adjusting nut (key 2), remove the spring
(key 8) and the pad unit (key 4-5-6-7).
c. Disassemble the pad unit parts and replace the pad
(key 6).
d. Check the seat on the valve body.
e. Re-assemble in reverse order.
SPARE PARTS
Spare parts storage shall be done by proper procedures
according to national standard/rules to avoid over aging or
any damage.
TROUBLESHOOTING
Table 3. General Troubleshooting for V Series Relief Valves
SYMPTOMS CAUSE ACTIONS
The valve does not open
Lack of incoming gas Check the station feeding
Valve diaphragm is broken
(V/50 and V/60 Series only)
To be replaced
Valve setting is higher than required Check valve setting
Pad is stuck to seat Perform complete valve maintenance
The valve is not sealed properly
Tight shutoff gaskets are worn To be replaced
Deposit of grime on the valve seat.
It can prevent proper closing
Perform complete valve maintenance
Valve setting is lower than required Check valve setting
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