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Valves & Actuation

Plastic Pneumatic Actuator Options

Series 79P PST-101 Positioner

The PST-101 pneumatic positioner for series 79 actuators is used for pneumatically actuated valves used in modulating service. The PST-101 uses a 3-15 psi pressure signal to control valve position. The unit features pressure gauges for quick inspection and a small package design for low air consumption.

Ideal Applications Include:

Chemical Processing, Bleach Plants, Aquariums, Mining, Water Treatment, Landfills, Swimming Pools, Power Plants


Input signal:

3- 15 psi

Air consumption:

– 0.4 CFM @ 60 psi


+/- 1% of span

Conduit entry:

½" NPT

Supply air pressure:

60 – 100 psi


+/- 2% of span


+/- 0.5% of span

Air connection:

¼" NPT


  • Simple calibration of positioner with independent zero and span
  • Short and precise response time
  • Type 4X enclosure
  • Corrosion resistant polyester powder coated enclosure
  • SS trim
  • Low air consumption
  • Pressure gauges
  • ¼" NPT air connection
  • Can operate in high vibration environments
  • Reverse acting capability
  • Temperature limit of 185 ◦F


  • Two x SPDT mechanical switches
  • Two x SPDT inductive switches
  • 4-20mA output transmitter