Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

GEMÜ 687 2/2-way aseptic diaphragm valve


The GEMÜ 687 pneumatically operated 2/2-way aseptic diaphragm valve has a low maintenance plastic membrane actuator and is pneumatically operated.

The GEMÜ 687 pneumatically operated 2/2-way diaphragm valve has a metal distance piece. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) control functions are available.


  • Connection: Clamp; Flange; Spigot; Threaded socket; Threaded spigot
  • Actuator: Pneumatic
  • ATEX
  • Explosion protection
  • Body material: 1.4408, PFA lined; 1.4408, investment casting; 1.4435, forged body; 1.4435, investment casting; EN-GJS-400-18-LT (GGG 40.3), PFA lined; EN-GJS-400-18-LT (GGG 40.3), PP lined; EN-GJS-400-18-LT, hard rubber lined
  • Max. operating pressure: 10 bar
  • Max. media temperature: 100 ° C
  • Min. media temperature: -10 ° C
  • Nominal sizes
  • Pilot valve
  • Control valve


  • Suitable for inert and corrosive liquid and gaseous media
  • Chemical resistance of actuator
  • Stainless steel body with CIP/SIP cleaning and sterilising capabilities
  • Insensitive to particulate media
  • Valve body and diaphragm available in various materials and designs
  • Various connections available
  • Surface finishes down to 0.25 µm, electropolished
  • Versions according to ATEX on request
  • Optical position indicator is standard for control function 1


  • The modular actuator system permits a variety of options to be used such as tank bottom valves, T valves, sampling valves, multi-port valves and tandem welded configurations
  • Optional flow direction
  • Installation for an optimized draining is possible
  • Optional accessories: – Stroke limiter – Optical position indicator control function 2 + 3 – Manual override (GEMÜ 1002, GEMÜ 1004) – Pilot valve with manual override (GEMÜ 0322 – 0326) – Electrical position indicators
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