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Key
Description
14
Piston Ring
15
Upper Seal
16
Valve Plug
17
Cage O-ring
18
Travel Indicator Scale
19
Travel Indicator Protector
20
Valve Plug O-ring
21
Lower Indicator Fitting O-ring
22
Flange Nut
23
E-Ring
24
Drive Screw (6 required)
25
Flow Arrow
26
Vent (2 required/
1 required for Pressure-Loaded Actuator)
27
Plug
28
Spring Seat
29
Hex Nut
DN 25 / NPS 1 (4 required)
DN 50, 80 and 100 / NPS 2, 3 and 4 (8 required)
30
Pipe Plug
33
NACE Tag (not shown)
34
Seal Wire (not shown)
35
Indicator Fitting
36
Back O-ring (2 required)
37
Indicator Fitting O-ring
38
Pipe Plug
40
Actuator Stem
43
Nameplate
44
Lube Fitting
45
Wiper Ring
46
Bearing (2 required)
47
Valve Stem O-ring (2 required)
48
Jam Nut (2 required)
49
Spring Washer
51
Lower Diaphragm Head O-ring
52
Lower Spring Guide
53
Lower Diaphragm Head
54
Lower Spring Seat
55
Diaphragm Plate
56
Diaphragm
57
Cap Screw
Low-Pressure Actuator (16 required)
High-Pressure Actuator (8 required)
58
Hex Nut
Low-Pressure Actuator
Steel (16 required)
Stainless Steel (16 required)
High-Pressure Actuator
Steel (8 required)
Stainless Steel (16 required)
60
O-ring
61
Bonnet
62
Lower Diaphragm Casing
63
Upper Diaphragm Casing
64
Upper Diaphragm Casing O-ring
65
Cap Screw (10 required)
66
Spring Case Spacer
67
Cap Screw (6 required)
68
Control Spring
69
Upper Spring Seat
70
Spring Case
71
Seal Washer (not shown)
72
Jam Nut
73
Adjusting Screw
75
Restrictor (not shown)
76
Pipe Bushing
81
Pipe Nipple (not shown)
82
Drain Valve (not shown)
84
Internal Stiffener Plate
85
Bleed Valve (not shown)
87
Upper Casing Welding Assembly (not shown)
L3
69
52
L1
64
66
65
L1
63
56
L1
58
S
62
51
L1
61
S
L1
40
L1
17
SEE DETAIL Y
16
L1
3
28
6
L1
21
L1
35
L1
37
8
18
GE38435
APPLY LUbRICAnT OR SEALAnT
L1 = MULTI-PURPOSE POLYTETRAFLUOROEThYLEnE (PTFE) LUbRICAnT
L2 = MULTI-PURPOSE nLGI
L3 = AnTI-SEIZE COMPOUnD
S = MULTI-PURPOSE PTFE ThREAD SEALAnT
Note: Keys 64 and 71 are used only for pressure-loaded actuators.
1. Lubricants and sealants must be selected such that they meet
the temperature requirements.
2. National Lubricating Grease Institute.
Figure 1. Type MR105 Assembly Drawings
Type MR105
71
68
76
S
26
SEE DETAIL V
55
53
SEE DETAIL X
65
L1
84
SEE DETAIL Z
13
L1
12
L1
11
L1
4
L1
9
29
L1
23
10
5
SEE DETAIL W
22
25
19
(1)
:
GRADE 1 GREASE
(2)
73
72
70
43
L2
44
30
S
26
38
S
1
L1
2
24
67
L1
57
L1
3
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