GEMU Model 698 Industrial Diaphragm Valve


The GEMU 698 motorized 2/2-way diaphragm valve has a low maintenance electric actuator with a toothed belt drive and a reversible synchronous motor. A manual override and an optical position indicator are standard.


  • Suitable for inert and corrosive liquid and gaseous media
  • Chemical resistance of actuator
  • Stainless steel body with CIP/SIP cleaning and sterilizing capabilities
  • Insensitive to particulate media
  • Valve body and diaphragm available in various materials and designs
  • The valve stroke can be limited by means of adjustable limit switches
  • Suitable for use as a control valve (with GEMU 1283)
  • Hermetic separation between medium and actuator
  • Optional flow direction, will seal in either flow direction up to full operating pressure
  • Optional mounting position
  • Consistent control system and reliable opening and closing action
  • Direct 0/4 – 20 mA signal processing using the additional module GEMU 1283
  • Electrical position feedback by means of a potentiometer available as an option


Nominal Sizes: 1/2″3/4″1″1-1/2″2″

Connection Type: 125# Flat Face Flange, 150# Flat Face Flange, 150# Raised Face Flange Serated, 150# Raised Face Flange Smooth, Flanged ANSI class 125/150 RF – length EN 558-2 Series 1, ISO 5752 Basic Series 1, Schedule 40 Socket Weld, Threaded NPT

Valve Body Material: 316 Stainless Steel with PFA Lined BodyCast Iron – ASTM A-126 Class B Body, Ductile Iron with Butyl Lined Body, Ductile Iron with Hard Rubber Lined Body, Ductile Iron with Hypalon Lined Body, Ductile Iron with Neoprene Lined Body, Ductile Iron with PFA Lined Body, Ductile Iron with Polypropylene Lined Body, Ductile Iron with PVDF Lined Body, Ductile Iron with Silica Free Soft Rubber Lined Body, Ductile Iron with Tefzel Lined Body, Investment Cast 316 Stainless Steel Body

Diaphragm Material: Buna-N, Butyl, EPDM, Hypalon, Natural Rubber Silica Free, Neoprene, PTFE/EPDM, PTFE/Viton, TFM/EPDM, TFM/Viton, Viton

Control Function: Motorized 120V, Motorized 230V, Motorized 24V