8 | Baker Hughes
Copyright 2021 Baker Hughes Company. All rights reserved.
Installation
Figure 5
Mounting Option A
Figure 6
Mounting Option C
1. The Filter connects to the Main Valve Inlet Supply via the
Inlet Supply Guide
2. Tubing splits from the Filter outlet to the Field Test Connection
(if applicable) and Type 25 Restrictor
3. The Field Test Connection (if applicable) connects to the
Pilot Sense port
4. The Type 25 Restrictor connects to the Pilot Inlet port
5. The Pilot Loading port connects to the Main Valve Dome
port
6. The Pilot Outlet connects to the NPT tapped main valve
outlet port
7. Connect the flanged inlet system piping to the upstream
inlet flange
8. Connect the flanged outlet system piping to the downstream
outlet flange
Remote Sensing
The Mooney Series 20 Relief Valve ships standard from the
factory with the sense line connected to the main valve inlet
supply guide. If the pressure drop between the source of pressure
in the system or equipment to be protected and the pressure at
the relief valve inlet exceeds 3%, the sensing line to the pilot
valve can be connected directly to the process system rather
than to the main valve. Pipe connections are ¼” NPT, and tubing
connections are 3/8” OD Seamless Stainless Steel.
ATTENTION:
For remote sensing, 3/8” (9.5 mm) OD tubing is
adequate for distances up to 10 feet (3m). Sense line locations
should be away from turbulent areas (elbows, valves, reducers,
etc.) and have full opening into the pipe free from burrs, drill
peels, and weld slag. Shut-off valves are not required, but if
used, should be full-bore.
Mounting Option A (Figures 5 & 7)
1. Remove tubing between the Field Test Connection (B) and
the filter (E), leaving NPT connections in place.
2. Connect the filter (E) and the restrictor (A) via new
tubing (D).
a. Elbow fitting the Type 25 Restrictor must be rotated
180° to perform this action.
Figure 7
3. Place a tubing plug on one of the open tubing connections
on the tubing tee above the Field Test Connection (B).
4. Connect remote sense location upstream of the valve to the
Field Test Connection (B) via new tubing (C).
