Festo GRLZ Female Flow Control Valve

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With the one-way flow control valve GRLA or GRLZ, the flow control function works in one direction only (exhaust air or supply air); the non-return function works in the opposite direction.

Features and Benefits

  • This range by FESTO includes valves with one-way flow control function for exhaust air. The one-way flow control valve regulates the piston speed of pneumatic drivers during advance and return strokes
  • The QS push-in fittings and captive seals paired with the robust, metal design enables a reliable and efficient installation that can be rotated or swivelled through a 360° axis
  • Simple and fast mounting with QS fittings
  • The valves are operated with a slotted screw (slot)
  • Wide operating temperatures
  • Threaded and female connection type options can be found within the GRLZ series
  • Depending on the choice of valve from the series a precise setting can be obtained, which range from slow, medium or fast piston movements


  • Port size:  M5, 1/8″, 1/4″
  • Flow rate: 100 … 1,580 l/min
  • Temperature range: –10 … +60 °C
  • Operating pressure: 0.2 … 10 bar

M5, 1/8", 1/4"