DynaQuip Controls
AP Series Valve Position Limit Switch
Key Features
Valve Position Limit Switch
  • Provides local or remote indication of valve position
  • Contains 2 SPDT switches
  • NEMA 4, 4X enclosure
  • 1/2" NPT conduit entry
  • Additional NEMA ratings and voltages are available

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POSITIONER

Pneumatic and electro-pneumatic positioners are commonly used to control flow, pressure, temperature, or level via an air actuated valve. 

The positioner interprets an analog signal (air or electric) and directs compressed air to the air chambers of the pneumatic actuator. The result is a corresponding adjustment to the degree of openness on the valve being operated by that actuator.

Pneumatic positioners commonly receive a 3 - 15 PSI air input signal whereas electro-pneumatic positioners employ integral I/P transducers for converting a 4 - 20 mA electrical input signal to a 3 - 15 PSI air output signal. Positioner housings are NEMA 4 or 4X construction with a stainless steel gauge set as standard in both types of positioners.

Additional Options Available

Speed Control Valves

  • Controls opening and/or closing times of the valve.

Dribble Controls

  • Rapid and slow opening or closing within the same stroke.
  • To prevent water hammer or to slow a fill process.

Manual Override

  • Handwheel declutchable manual override for doubleacting or spring-return pneumatic actuators.

Specification

Pneumatic Valve, Dual Rack and Pinion Design, Air Actuator, NEMA 4, NEMA 4X, Air Driven Valve, Quarter-Turn Air Actuator, Quarter-Turn Pneumatic Actuator, Air Operator, Pneumatic Operator, Air to Open, Double Acting, Air to Close