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GE Severe Service Valves masoneilan 77000 series Brochure Page 9

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77000 Series - Axial Flow Labyrinth Trim Control Valves | 9
Numbering System
1st 2nd 5th4th3rd2nd
7
1st
7
Actuator Type
Spring Diaphragm
37 Spring-Diaphragm
Direct, Air to Open
(fail close action)
38 Spring-Diaphragm
Reverse, Air to Close
(fail open action)
87 Spring-Diaphragm
Direct, Air to Open
(fail close action)
88 Spring-Diaphragm
Reverse, Air to Close
(fail open action)
Piston Cylinder
84 Cylinder: spring return,
Direct, Air to Open,
single or double acting
(fail close action)
85 Cylinder: spring return,
Reverse Air to Close,
single or double acting
(fail open action)
86 Cylinder:
double acting, without
spring, Air to Open or
Air to Close action
6th
Body Series
77 Multi-stage,
axial flow
labyrinth trim
control valve
Trim Type
0 Undefined
1 Trim A
Unbalanced
2 Trim B
Unbalanced
3 Trim C
Unbalanced
Trim
Characteristic
0 Undefined
1 Linear
Design
0 Undefined
1 Bottom Entry,
Outlet Spool
Design
2 Top Entry,
Bolted
Bonnet
Design
Options
F Forged
Body
Flow Coefficient (C
v
) & Expansion Ratios
* Note: Special designs with oversized and reduced C
v
trim are available. Please consult the factory.
Valve Size
(inch)
Outlet Options
(Inch)
Trim Size
A B C
Expansion
Ratio
C
v
Expansion
Ratio
C
v
Expansion
Ratio
C
v
1
1
2
3
4:1 2 2:1 4 1.5:1 6
4:1 2 2:1 4 1.5:1 6
4:1 2 2:1 4 1.5:1 6
2
2
3
4
4:1 12 2:1 22 1.5:1 35
4:1 12 2:1 22 1.5:1 35
4:1 12 2:1 22 1.5:1 35
3
3
4
6
4:1 31 2:1 45 1.5:1 72
4:1 31 2:1 45 1.5:1 72
4:1 31 2:1 45 1.5:1 72
4
4
6
8
4:1 54 2:1 72 1.5:1 110
4:1 54 2:1 72 1.5:1 110
4:1 54 2:1 72 1.5:1 110
6
6
8
10
4:1 72 2:1 120 1.5:1 170
4:1 72 2:1 120 1.5:1 170
4:1 72 2:1 120 1.5:1 170
8
8
10
12
4:1 120 2:1 180 1.5:1 260
4:1 120 2:1 180 1.5:1 260
4:1 120 2:1 180 1.5:1 260
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