GEMÜ 658

Pneumatically operated diaphragm valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ 658 2/2-way diaphragm valve has a two-stage actuator. In addition to full stroke, a partial stroke can be set via two pistons working independently of each other.All actuator parts including closing springs (except seals) are made from stainless steel. The valve is available with a Normally Closed control function. An opening stroke limiter for setting the partial stroke is integrated as standard.

  • An adjusting screw in the actuator enables the setting of the opening and closing function and also the setting of a partial stroke (for reduced flow)
  • Both fast on/off operation and precision dosing of the working medium possible
  • Suitable for inert, corrosive, liquid and gaseous media
  • CIP/SIP capable
  • Compact design (ideal when space is at a premium)
  • Version according to ATEX on request
  • Mounting of proximity switches for OPEN and CLOSED position feedback possible (MG 25 – 50)
  • Media temperature :-10 to 100 °C
  • Sterilization temperature:Max. 150 °C
  • Ambient temperature:0 to 60 °C
  • Operating pressure :0 to 10 bar
  • Nominal sizes:DN 10 to 65
  • Body configurations:2/2-way body | i-body | Multi-port body | T body | Tank valve body | Welding configuration
  • Connection types:Clamp | Flange | Spigot | Threaded connection
  • Connection standards:ANSI | ASME | BS | DIN | EN | ISO | JIS | SMS
  • Body materials:1.4408, investment casting material | 1.4435 (316L), forged material | 1.4435 (BN2), forged material | 1.4435, investment casting material | 1.4539 (904L), forged material
  • Diaphragm materials:EPDM | FKM | PTFE/EPDM
  • Conformities:3A | BSE/TSE | CRN | EAC | EHEDG | FDA | Oxygen | Reg. (EU) No. 10/2011 | Regulation (EC) No. 1935/2004 | Regulation (EC) No. 2023/2006 | TA Luft (German Clean Air Act) | USP

Fitting Accessories

Product video

How diaphragm valves with metal valve bodies work

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Online since 16.09.2015

Product news

12.09.2023

Lighter. More compact. More hygienic.