The new GEMU 660 2/2-way diaphragm valve was designed for dosing and filling a wide range of products. All metallic actuator components are made of stainless steel. Normally closed, Normally open and Double acting control functions are available. The valve has an integrated stroke limiter and seal adjuster as well as an optical position indicator as standard.

  • Suitable for inert and corrosive liquid and gaseous media
  • Valve body and diaphragm available in various materials and designs
  • Compact design (ideal when space is at a premium)
  • Various connections available
  • CIP/SIP cleaning and sterilizing capabilities
  • Optional flow direction
  • Optional mounting position
  • Stroke limiter and seal adjuster easy to adjust
  • Precise stroke scale on the cover, can be fixed, 10 scale points per turn, one full turn corresponds to 1 mm stroke
  • Improved sealing, distance sleeves for the diaphragm (not for steam applications)
  • 2 control air connectors in flow direction, 4 control air connectors as an option, two of which are arranged across the flow direction
  • Fast cycle duties due to minimized filling volume
  • Reduced air consumption
  • Mounting of electrical position indicators (as an option)


Type 660
Nominal Size DN 10 DN 15 DN 20 DN 25
Body Configuration 2/2-way body Multi-Port Design T Valve Body Tank valve body
Connection Butt Weld Spigots ASME BPE Butt Weld Spigots BS 4825, Part 1 Butt Weld Spigots DIN Butt Weld Spigots DIN 11850, Series 1 Butt Weld Spigots DIN 11850, Series 2 Butt Weld Spigots DIN 11850, Series 3 Butt Weld Spigots DIN 11866, series A Butt Weld Spigots EN ISO 1127 Butt Weld Spigots JIS-G 3447 Butt Weld Spigots JIS-G 3459 Butt Weld Spigots SMS 3008
Valve Body Material 1.4435 - BN2 (CF3M) - investment casting Fe<0.5% 1.4435 (316L) Block Material 1.4435 (316L) forged body 1.4435 (ASTM A 351 CF3M) investment casting (Material equivalency 316 L) 1.4435 (BN2), block material Fe<0.5% 1.4435 (BN2), forged body Fe<0.5%
Diaphragm Material1 EPDM, max. 150°C EPDM, max. 150°C PTFE/EPDM, PTFE laminated, max. 150°C
Control Function Double acting (DA) Normally closed (NC) Normally open (NO)
Actuator Size
Actuator size 1 (diaphragm size 10) Actuator size 2 (diaphragm size 25)
Actuator Version Control air connectors in flow direction Control air connectors in flow direction and 90° offset
Spring Set Standard
Surface Finish2 Ra ≤ 0.25 µm, electropolished internal/external Ra ≤ 0.25 µm, mechanically polished internal, blasted external Ra ≤ 0.4 µm, electropolished internal/external Ra ≤ 0.4 µm, mechanically polished internal, blasted external Ra ≤ 0.6 µm, electropolished internal/external Ra ≤ 0.6 µm, mechanically polished internal, blasted external Ra ≤ 0.8 µm, electropolished internal/external Ra ≤ 0.8 µm, mechanically polished internal, blasted external Ra ≤ 6.3 µm, blasted internal/external Ra ≤ 6.3 µm, electropolished internal/external
Max. Ambient Temperature 60 ºC

Working Medium

Working Medium Corrosive, inert, liquid and gaseous media which have no negative impact on the physical and chemical properties of the body and diaphragm material.
Operating Temperature Operating temperature (drinks filling): Max. 85 ºCOperating temperature (other applications): Max. 90 ºC
Sterilization Temperature3 Max. 150 ºC

Control Medium

Control Medium Inert Gases
Max. Perm. Temperature of Control Medium 60 ºC
Filling Volume Actuator size 1 (C.f.1): 0.021 dm3 Actuator size 1 (C.f.2+3): 0.010 dm3 Actuator size 2 (C.f. 1): 0.060 dm3 Actuator size 2 (C.f. 2+3): 0.038 dm3


N/A The valve will seal in both flow directions up to full working pressure (gauge pressure).

  • 1 Steam sterilization temperature / 20 min. Material complies with FDA requirements.
  • 2 Ra acc. to DIN 4768; at defined reference points.
  • 3 Dependent on medium wetted materials.