Technical Specifications

2 | GE Oil & Gas

Reverse: air to retract stem

Type 38

Direct: air to extend stem

Type 37

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 me-

chanical strength and adequate protection in the event of severe

over-pressurization

Thrust Capability

Two actuator types and seven sizes provide a wide range of ap-

plications

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

2nd1st

Actuator

Types

37 Air to Close

38 Air to Open

Numbering System