Type 37/38 Pneumatic Spring Diaphragm Actuator

Control Valves, Masoneilan, Pnuematic Actuators

Type 37/38 Pneumatic Spring Diaphragm Actuator

The Masoneilan Type 37/38 pneumatic spring diaphragm actuator is a high thrust actuator for use with reciprocating or linear stem-motion control valves. It provides long stroke capability with optional construction to meet fail-safe action required by customers.

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Features And Benefits

  • Rugged design offers long-term reliable actuation and control performance
  • Simple valve interface allows easy actuator assembly and disassembly from the control valve
  • Low friction diaphragm design along with an external spring adjustment feature offers in-situ flexibility to meet changing conditions
  • Single spring construction provides long stroke functionality covering a wide range of control valve applications

Common Applications

The Masoneilan Type 37/38 actuator is designed for use in globe control valve applications requiring longer strokes and higher thrust. It provides excellent throttling control performance and meets various fail-safe and linear thrust requirements using a single spring configuration.
Linear or reciprocating motion control valves
Pneumatically operated control systems
Low to high pressure drop applications
Mechanical spring fail-safe operation
Manual override to mechanically position valve
Mounts directly on control valve bonnet
Actuator stem connected directly to valve stem