Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

GEMÜ 658/688 2/2-way aseptic diaphragm valve


The GEMÜ 658/688 2/2-way or multi-port metal diaphragm valves have a two stage actuator and are pneumatically operated. The actuator has a stainless steel housing and is controlled by two pistons working independently of each other. A stroke limiter is integrated as standard. Several body configurations are available for the GEMÜ 658/688 2/2-way or multi-port metal diaphragm valve.


  • Connection: Clamp; Spigot; Threaded socket; Threaded spigot
  • Actuator: Pneumatic
  • ATEX
  • Explosion protection
  • Fieldbus
  • Body material: 1.4408, investment casting; 1.4435, forged body; 1.4435, investment casting
  • Max. operating pressure: 10 bar
  • Max. media temperature: 100 ° C
  • Min. media temperature: -10 ° C
  • Nominal sizes


  • Suitable for inert and corrosive liquid and gaseous media
  • CIP/SIP cleaning and sterilizing capabilities
  • An adjusting screw in the actuator enables the setting of the opening and closing function and also the setting of a part stroke (for reduced flow)
  • Fast on/off operation and the possibility for precision dosing of the working medium
  • Insensitive to particulate media
  • Valve body and diaphragm available in various materials and designs
  • Compact design
  • Versions according to ATEX on request


  • Optional flow direction
  • Installation for an optimized draining is possible
  • Can be individually used. Space consuming piping systems and valve wiring are no longer necessary
  • Extensive range of accessories (e.g. pilot valves, limit switches, field bus connections)
  • With GEMÜ 688 the Closed and Open positions (full stroke) can be detected via M8x1 proximity switches. The proximity switches must be suitable for flush mounting. For diaphragm size 40 and 50 proximity switches with a minimum thread length of 35 mm are required.
 Chiama  :
Scrivici :