4
OPERATION
Model 3650B Series pressure relief valves
When the internal tank pressure approaches
the valve setting, the pallet begins to lift. as the
pressure exceeds the valve setting, the pallet
lifts off the seat ring. excess product vapor is
allowed to vent through the pipe away system
adapter, relieving the over pressure condition.
The pallet automatically re-seats as the tank
pressure drops below the valve setting.
Model 3600B and 3650B Series vacuum
relief valves
When a vacuum within the tank approaches
the valve setting, the pallet begins to lift. as
the vacuum exceeds the valve setting, the
pallet lifts off the seat ring. atmospheric or dry
air is allowed to flow into the tank, relieving
the excess vacuum condition. The pallet
automatically re-seats as the tank vacuum
drops below the valve setting.
fiGure 2. preSSure coNTrol operaTioN
fiGure 3. vacuum coNTrol operaTioN
TABLE 3 - 3650B SERIES PRESSURE SETTING
Series
Pressure Setting Low Range
Pressure Setting High Range
3650B
0.3 to 16
*
osig / 1.3 to 68.9* mbar
16
*
to 32 osig / 68.9* to 138 mbar
*10 osig / 43.1 mbar for 2 and 3 inchec sizes.
TABLE 4 - 3600B AND 3650B SERIES VACUUM SETTING
Series
Vacuum Setting Low Range
Vacuum Setting High Range
3600B
0.3 to 16
(1)
osig / 1.3 to 68.9
(1)
mbar
16
(1)
to 32 osig / 68.9
(1)
to 138 mbar
3650B
0.3 to 16
(2)
osig / 1.3 to 68.9
(2)
mbar
16
(2)
to 32 osig / 68.9
(2)
to 138 mbar
NOTES
1. 10 osig / 43.1 mbar for 2, 3 and 4 inches sizes
2. 10 osig / 43.1 mbar for 2 and 3 inches sizes
VAREC
3600B/3650B SerieS preSSure or vacuum relief valveS
INSTRUCTION, OPERATION AND MAINTENANCE MANUAL
