GE 37, 38 Technical Specifications
GE Oil & Gas
Masoneilan* Valves
37/38 Pneumatic Spring
Diaphragm Actuator
The 37/38 Series actuator is designed to
provide high performance, reliability and
long service life.
Technical Specifications
05/2013
Features
GE's Masoneilan Type 37 direct acting and Type 38 reverse acting
pneumatic spring diaphragm actuators are designed to provide
high performance. Their features include:
Heavy One-piece Yoke
Provides maximum strength and rigidity
Diaphragm Cases
Pressed steel upper and lower cases combine lightness, high mechanical strength and adequate protection in the event of severe
over-pressurization
Thrust Capability
Two actuator types and seven sizes provide a wide range of applications
Diaphragm
Molded elastomer with fabric insert for strength, long life and
high sensitivity
Linearity
The molded diaphragm and deep cases minimize area change
and produce a linear relationship between travel and air pressure
Numbering System
2nd1st
3
Actuator
Types
37 Air to Close
38 Air to Open
2 | GE Oil & Gas
Direct: air to extend stem
Type 37
Reverse: air to retract stem
Type 38
Specifications
Nominal
Diaphragm Max. Bench Max.
Actuator Effective Travel Range Supply
Size Area (sq. in.) (in.) psi psi
11 71 1.0 3-15 60
6-30
13 105 1.5 3-15 60
6-30
15 145 2.0 3-15 60
6-30
18 200 2.5 3-15 60
6-30
18 (16") 200 4.0
6-30
18 (20") 200 4.0 6-30 60
Rev. only
24 330 4.0
6-30
NOTE: Additional travels and spring ranges available.
3-15 60
3-15
55
Travel Time - Typical Bench Values
8012
Electro- 7400
Actuator Travel pneumatic Pneumatic
Size (inches) Positioner Positioner
1.5 6.3 13
2.0 11.4 20
2.5 21 34
4.0 32 48
¨
3-15 psi bench range and 20 psi supply. For 6-30 psi bench range,
increase travel time by 15%.
11 1.0 3.3 7
1.0 4.9 11
13
1.5 9.4 17
15
2.0 19 30
18
18 (16")
3.5 29 44
Time (seconds)¨
Model 37/38 Pneumatic Spring Diaphragm Actuator | 3
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