PneuMaster Pneumatic Diaphragm Actuator | Schlumberger
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PneuMaster

Pneumatic diaphragm actuator

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The PneuMaster pneumatic diaphragm actuator is a diaphragm-type actuator that complements our field-proven pneumatic actuators offerings. The PneuMaster actuator delivers reliable, fail-safe performance when returning the gate valve to the closed position. This actuator also can be mounted on either the upper master or wing valve and can be operated by clean well gas or an air supplied well panel. 

Designed and built to the industry’s highest standards, the PneuMaster pneumatic diaphragm actuator delivers simplicity, low weight, durability, and ease of maintenance. Because this actuator is lighter than standard piston-type actuators, it is ideal for tension-leg platforms (TLPs) and other weight-sensitive applications.

Features

  • Rising stem that provides visual indication of valve position
  • Light weight that allows for easy installation and maintenance
  • Nonelastomeric bonnet seal design provides superior sealing in harsh environments
  • Molygard wiper rings prevent stem galling during operation and prohibit foreign particles on the surface of the stem from entering the actuator body and damaging the dynamic seal system
  • External safety relief device protects the actuator from overpressurization
Cutaway of SSS PneuMaster Pneumatic Diaphragm Actuator

Specifications

Service for 12-in piston

  • Maximum operating pressure: 150 psi [10 bar]
  • Maximum valve working pressure: 5,000 psi [345 bar]
  • Production test pressure: 248 psi [17 bar]
  • Operating temperature range: –20 to 250 degF [–29 to 121 degC]
  • Product weight: 92 lbm [42 kg]
12-in Piston Maximum Control Pressure
Mounted on 2-in valve
(0.0280 × valve pressure) + 5 psi [0.34 bar]
Mounted on 2 1/2-in valve (0.0280 × valve pressure) + 4 psi [0.27 bar]

Service for 14-in piston

  • Maximum operating pressure: 150 psi [10 bar]
  • Maximum valve working pressure: 5,000 psi [345 bar]
  • Production test pressure: 248 psi [17 bar]
  • Operating temperature range: –20 to 250 degF [–29 to 121 degC]
  • Product weight: 150 lbm [68 kg]
14-in Piston Maximum Control Pressure
Mounted on 1 13/16-in, 10,000-psi valve (0.0146 × valve pressure) + 4 psi [0.27 bar]
Mounted on 3-in valve (0.0279 × valve pressure) + 3 psi [0.20 bar]

Service for 18-in piston

  • Maximum operating pressure: 150 psi [10 bar]
  • Maximum valve working pressure: 5,000 psi [345 bar]
  • Production test pressure: 248 psi [17 bar]
  • Operating temperature range: –20 to 250 degF [–29 to 121 degC]
  • Product weight: 200 lbm [91 kg]
18-in Piston Maximum Control Pressure
Mounted on 2-in valve (0.0090 × valve pressure) + 6 psi [0.41 bar]
Mounted on 2 1/2-in valve (0.0100 × valve pressure) + 5 psi [0.34 bar]
Mounted on 3-in valve (0.010 × valve pressure) + 6 psi [0.41 bar]
Mounted on 4-in valve (0.0200 × valve pressure) + 6 psi [0.41 bar]

Clear Stem Protector

For actuator applications

See the actuator's rising stem while preventing damage to it.

Bonnet Seals

Superior strength and reliability

Withstand extreme forces during HPHT operations and seal during low-pressure operations.

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