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Low/High Temperatures, DIN & M12 Connection [21 Series] 2/2, 3/2, & 4/2 Functions, 1/4" to 1-1/2" Port Sizes

  • Perpendicular Poppet Face Seals Creates High-Flow and Positive Sealing
  • Differential Piston Design Delivers Fast and Consistent Response Times
  • Overwhelming Shifting Forces Provides No-Stick Operation
  • High Velocity Air Flow Across Poppet Seats Allows Self-Cleaning and Strong Dirt Tolerance
  • Superior Internal Guidance System and Self-Compensating Seals Delivers Long-Life

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 21 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 21 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.


Fluorocarbon and Buna-N seal options enable these valves to be used in a wide range of lower or higher temperature applications.


Please refer to the link on the left to easily view and download the ROSS Controls 21 Series 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.