Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

GEMÜ R690 2/2-way plastic diaphragm valve


The GEMÜ R690 plastic diaphragm valve has a low maintenance membrane actuator which can be controlled by air or inert gases.

The GEMÜ R690 plastic diaphragm valve is pneumatically operated. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) control functions are available. All medium wetted parts and the actuator housing are made of high-grade plastic materials which can be selected to suit the application. The High-Flow valve body provides compact dimensions at high flow rates.


  • Connection: Flange; Spigot; Union end
  • Actuator: Pneumatic
  • Body material: ABS; PP; PVC-U, grey; PVDF; PVDF inliner
  • Max. operating pressure: 10 bar
  • Max. media temperature: 80 ° C
  • Min. media temperature: -20 ° C
  • Nominal sizes
  • Control valve


  • Suitable for inert and corrosive liquid and gaseous media
  • Insensitive to particulate media
  • Optional flow direction and mounting position
  • Nominal pressure PN 10 / 150 PSI
  • Nominal size DN 15 – DN 100 / NPS 1/2” – NPS 4”
  • Actuator housing in glass fibre reinforced PP
  • Valve body and diaphragm available in various materials and designs


  • Compact, lightweight construction and high performance
  • Good flow characteristics due to flow optimized valve body
  • Proven long-life membrane actuator
  • Leak detection hole
  • Diaphragm easy to replace
  • Adjusted instrumentation
  • Optical position indicator as standard
  • Optional accessories

– Electrical position indicator with microswitches or proximity switches

– Positioner and process controller

– Stroke limiter

– Pilot valve

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