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VAREC 7100B SERIES PRESSURE RELIEF VALVE
INSTRUCTION, OPERATION AND MAINTENANCE MANUAL
OPERATION
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 to the atmosphere,
relieving the over pressure condition. The pallet
automatically re-seats as the tank pressure
drops below the valve setting.
INSTALLATION (PLACING INTO SERVICE)
7100B Series relief valve must be mated with
the appropriate flange. The nozzle must be
plumb and the inlet flange face level to ensure
proper operation of the relief valve.
1. Remove the valve from the shipping
container. Check to see if extra
loading weights were bagged and
packed separately.
2. Remove the weatherhood and/or cover(s)
and all packing material above the pallet
and within the valve.
CAUTION
Whenever the weatherhood is removed and
reinstalled, the end of the pallet stem must
engage the stem guide in the weatherhood for
proper seating and valve operation.
FIGURE 2. PRESSURE FLOW
TABLE 2 - 7100B SERIES PRESSURE SETTING
Series
Pressure Setting Low Range
7100B
0.3 to 16 osig / 1.29 to 68.9 mbarg
Pressure Setting High Range
16 to 32 osig / 68.9 to 138 mbarg
3
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