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Standard Temperatures with Air Logic [Classic 27 Series] 2/2, 3/2, & 4/2 Functions, 1/4" to 1-1/2" Port Sizes



  • Timed sequence actuation and/or deactuation
  • Momentary control of actuation and/or deactuation from one pressure source
  • Actuating force multiplier, for use with low signal pressures
  • Poppet construction for high dirt tolerance
  • Internal or external; easily field-convertible for use with an external pilot supply

The function of directional control valves is to control the direction of flow in a pneumatic circuit. These valves can regulate the airflow being capable of stopping, passing, and changing the direction of airflow. These three functions usually operate in combination with each other.


Directional control valves have multiple ports with the number dependent on the valve type. All these valves have an inlet and an outlet port while many also have an exhaust port. The 27 series is offered in 2/2, 3/2, and 4/2 valve functions with a port size range of ¼” to 1-1/2” in both NPT and G threads.


The poppet construction of the 27 Series enables high-flow, positive sealing, self-cleaning, and a strong dirt tolerance that delivers a long-life. This valve series is available in both solenoid and air pilot controlled options. Solenoids are offered in several AC and DC voltages along with multiple electrical options that include DIN, M12 and conduit with leads.


27 Series inline poppet valves are available with LOGICAIR® adaptors to provide special functions:


  • Timed sequence actuation and/or deactuation
  • Momentary control of actuation/deactuation from one pressure source
  • Actuating force multiplier, for use with low signal pressures.


Pressure Booster Adaptor – Increases the actuating force on the valve piston. Useful with low pilot pressure.


Air Index Adaptor – Allows a single control valve to function as an impulse controlled, detented valve. Successive momentary signals from the same source actuate and de-actuate the valve.


Timed Sequence Adaptor – Allows the actuation and/or de-actuation of a valve to be delayed up to 30 seconds for 2/2 valves, and up to 3 seconds for 3/2 and 4/2 valves. For longer delays see adaptor below.


Timed Sequence Extension Adaptor – For use in conjunction with the timed sequence adaptor to extend the delay interval up to 60 seconds. This adaptor also provides quicker response to actuating and de-actuating signals.


Please refer to the link on the left to easily view and download the ROSS Controls 27Series Inline Poppet Valves with Increased Temperature Range product catalog for additional technical data. In addition, you can filter through all available options below to select the ideal valve that meets your requirements.