IX. 2900 Series Pilot Operated Safety Relief Valves (Cont.)
J 39MV22/72 Pilot Valve (Standard Service)
HIGH PRESSURE
1/4”-18 NPT
VENT
1/4”-
18 NPT
2
1
21
16
3
22
17
11
10
4
5
15
23
27
34
20
8
19
7
6
9
12
13
24
24
32
31
29
18
14
8
25
28
30
20
12
33
Figure 11: 39MV22/72 Pilot Valve Construction
IX. 2900 Series Pilot Operated Safety Relief Valves (Cont.)
Part
No.
Nomenclature
1
Main Base
2
Adjuster Cap
3
Adjuster Top
4
Adjuster Bottom
5
Adjuster Lock Nut
6
Compression Screw
7
Compression Screw Lock Nut
8
Spring Washer
9
Spring
10 Insert Top
11
Insert Bottom
12
Main Piston
13
Cap (Compression Screw)
14
Cap Screw (Top Plate)
15 O-Ring (Adjuster Bottom)
16 O-Ring (Adjuster Top)
17
O-Ring (Insert)
18 O-Ring (Top Plate)
19 Bonnet
20 Spring Seal (Main Piston)
21 Spring Seal (Adjuster Top)
22 Spring Seal (Insert)
23 Field Test Connector
24 Vent Assembly/Bug Screen
(Field Test Connection)
25 Vent Assembly (Bonnet Vent)
1
27
Set Screw (Bonnet)
28 Piston Nose
29 Piston Retainer Nut
30
Set Screw (Piston)
31 Vent Seal (Adaptor)
32 Spring Seal (Vent Seal Adaptor)
33 Back-up Ring (39MV72 Only)
34 Top Plate
35 Plug Filter (Used in Sensing Tube
When Equipped) (not shown)
1: Standard material is a filter plug. For
special materials, vent assembly is
supplied.
Consolidated 2900 Series Generation II POSRV Instruction Manual
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