Whisker Valve Controls Automated Machinery

Dec. 2, 2015

Series 3 mechanically-operated sensor valve, also called a “whisker valve,” are used as a limit switch in applications where very low actuation forces and high-flow rates are required. Sensor valves are most commonly used to control automated machinery by detecting the presence, absence, passing, positioning, or end-of-travel of an object.

The actuation sensitivity, which is less than 0.5 lb (2N) at 90 psi, may be increased by adding a 3-mm dia. “whisker rod” to the pre-drilled hole at the end of the lever. When the mechanical lever of the Series 3 valve is actuated, it releases an internal pilot signal to atmosphere. The depressurization of the spool plunger allows the internal mechanical spring to shift the valve spool.

  • Actuation force: < 0.5 lb (2N) at 90 psi operating pressure 
  • Valve Function:  3-way/2-position normally closed or normally open (spring return), and 5-way/2-position (spring return)
  • Ports:  1/8-in. NPTF or BSPP
  • Operating Temperature: 32°F - 175°F
  • Operating Pressure: 58 – 145 psi
  • Nominal Flow: .73 C