XXII. 2900 Pilot Valve Options (Cont.)
G. Gag
A manual method of locking a pilot operated relief
valve in the closed position for system hydrostatic test.
39MV72 limited to 4800 psig (330.9 barg) with gag
option (Figure 83).
H. Heat Exchanger
This allows the temperature range for the 3900
POSRV with metal seats to be extended to -320°F to
650°F (-195.5°C to 343.3°C). Not available above
3750 psig (258.5 barg). When the heat exchanger is
selected, the POSRV shall be piped so that the
media enters the heat exchanger first to condition the
media’s temperature. Option(s) such as line filter,
canister filter, 5-way manifold valve, pressure
differential switch, pressure spike snubber, etc. shall
be piped downstream of the heat exchanger (Figures
84 and 85).
Figure 83: Gag
Figure 84: Heat Exchanger - Hot Service
Figure 85: Heat Exchanger - Cold Service
Consolidated 2900 Series Generation II POSRV Instruction Manual
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