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GEMÜ 698

Motorized diaphragm valve

  • Description
  • Features
  • Technical specifications

The GEMÜ 698 2/2-way diaphragm valve has a low maintenance motorized actuator with a reversible synchronous motor. A manual override and an optical position indicator are integrated as standard. The valve has a metal distance piece.

  • Hermetic separation between medium and actuator
  • Optional flow direction and installation position
  • Reliable opening and closing action and consistent control system
  • Direct processing of 0/4 – 20 mA signals via an additional module available as an option
  • Electrical position feedback by means of a potentiometer available as an option
  • Connection: Clamp; Flange; Spigot; Threaded socket; Threaded spigot
  • Actuator: Motorized
  • Body material: 1.4408, PFA lined; 1.4408, investment casting; 1.4435, forged body; 1.4435, investment casting; EN-GJL-250; 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: DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')

Product video

How diaphragm valves with metal valve bodies work

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Online since 16.09.2015
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Further applications

Product applications

Sterile air filters for dairy equipment

Sterile air filters are needed for dairy technology and also for other sterile processes such as in the pharmaceutical industry. They serve, for example, to bleed piping systems after steam sterilisation, to ventilate containers and tanks when the filling levels vary or to decontaminate laminar flow of air in order to hinder that system components which are to be kept sterile come into contact with the contaminated atmosphere. Generally speaking, sterile air filters serve as an interface between a sterile area and the surrounding atmosphere. Therefore they must be viewed as an especially important part of a sterile system and their function significantly influences the quality of the product. The weaknesses of the sterile air filters are often insufficient monitoring, contaminated condensate and, above all, a working life which is too low.