Positron II & III Actuators


Pratt offers a wide variety of actuator styles to suit a multitude of applications. The Pratt valve is available with manual, buried service, submersible service, hydraulic or pneumatic, and electric actuators. Every actuator is specifically designed for long life in utility service with minimum maintenance. Actuators for open/close service, throttling or modulating service are all available in hydraulic, pneumatic and electric models. Pratt supplies a variety of actuator accessories. Each accessory is designed to meet specific operating requirements.

For more than 80 years the Henry Pratt Company has provided innovative products for water distribution and treatment applications. Our POSITRON series electric actuators continue in this tradition. The POSITRON series not only meets AWWA standard C504 and C540, but also incorporates the finest technological features in valve actuation. The following features and benefits help to demonstrate why the Pratt POSITRON series is an excellent option for your actuation requirements.


  • Conforms to AWWA C540
  • NEMA-4 enclosure
  • Space Heater
  • Adjustable mechanical stops
  • Thermal switches in the motor windings
  • Torque and limit switches are located in separate compartment from the electrical compartment
  • Side mounted handwheel
  • Open and close counter-gear driven limit switches
  • Sixty second operation
  • Singe source of supply for valve and actuator