Lifting Lever; Manual, Electrical, Or Pneumatic Blowdown Valve - GE Baker Hughes 2900-40 Series Maintenance Manual

XXII. 2900-40 Series POSRV Options (Cont.)
manifold valve, pressure differential switch, pressure spike
snubber, etc. shall be piped downstream of the heat exchanger
(Figures 49 & 50).
H. Lifting Lever
This is an external, physical means of allowing the pilot valve
to relieve dome pressure so that the main valve can open.
I. Manual, Electrical, or Pneumatic
Blowdown Valve
Figure 51: Manual Blowdown Valve
© 2019 Baker Hughes, a GE company. All Rights Reserved.
(Figures 51 & 52)
An optional manual blowdown valve is available for relieving
the pilot operated safety relief valve. Consult factory for
applications requiring a pneumatic or electrical solenoid
blowdown valve which may be connected to a distant location,
such as an operator station, for remote actuation. The
blowdown valve is ported directly to the main dome area, so
that the media in the dome is vented when the blowdown
valve is actuated, thus allowing the main valve to open.
Figure 52: Electrical Blowdown Valve
Consolidated 2900-40 Series POSRV Maintenance Manual | 59