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The GEMU 650 piston actuated 2/2-way diaphragm valve is designed for use in sterile areas of application. All metallic actuator components are made of stainless steel. The piston (which travels in two separate bearings) and valve spindle are machined from a single piece of stainless steel. Normally Closed, Normally Open and Double Acting control functions are available. The valve is available with two actuator versions: Design D has concealed bolt mounting in the actuator and is only suitable for 2-way valves. Design T is suitable for T valve, Multi-port valve, Tank bottom valve and 2-way valve bodies. The valve has an optical position indicator as standard.

Features
  • Suitable for inert, 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
  • Autoclavable, dependent on design
Advantages
  • Hermetic sealing
  • Optional flow direction
  • Optional mounting position
  • Design D for the 2-way version is mounted by means of female threads in the actuator
  • Control air connections positioned in-line with piping
  • Expelled air from spring chamber can optionally be piped to other locations
  • Extensive range of accessories, easily retrofitted

Specifications

Note Please click "Magnifying Glass" next to the attributes listed below to view helpful information.
Type 650
Nominal Size DN 10 DN 15 DN 20 DN 25 DN 32 DN 4 DN 40 DN 6 DN 8
Body Configuration 2/2-way body Multi-Port Design T body Tank valve body
Connection Butt Weld Spigots to ASME BPE Butt Weld Spigots to BS 4825, Part 1 Butt Weld Spigots to DIN Butt Weld Spigots to DIN 11850, series 1 Butt Weld Spigots to DIN 11850, series 2 Butt Weld Spigots to DIN 11850, series 3 Butt Weld Spigots to DIN 11866, series A Butt Weld Spigots to EN ISO 1127 Butt Weld Spigots to JIS-G 3447 Butt Weld Spigots to JIS-G 3459 Butt Weld Spigots to SMS 3008 Clamps ASME BPE for pipe ASME BPE length EN 558-1, series 7 Clamps ASME BPE for pipe ASME BPE, short design Clamps DIN 32676 for pipe DIN 11850 length EN 558-1, series 7 Clamps following ASME BPE for pipe EN ISO 1127, length EN 558-1 series 7 Clamps SMS 3017 for pipe SMS 3008 length EN 558-1, series 7 One side threaded spigot to DIN 11851, other side cone spigot and union nut to DIN 11851 Threaded Sockets DIN ISO 228 Threaded spigots to DIN 11851
Valve Body Material 1.4435 (316 L) Block material 1.4435 (316 L) Forged body 1.4435 (ASTM A 351 CF3M) Investment casting (Material equivalency 316L)
Diaphragm Material1 EPDM, max. 130°C EPDM, max. 150°C EPDM, max. 150°C (For diaphragm size 8) EPDM, max. 150°C (For diaphragm size 8) EPDM, max. 150°C EPDM, max. 150°C PTFE/EPDM convex PTFE loose, max. 150°C PTFE/EPDM PTFE lamin., max. 150°C (For diaphragm size 10) PTFE/EPDM PTFE lamin., max. 150°C (For diaphragm size 8) PTFE/FPM convex PTFE loose, max. 150°C PTFE/Silicone convex PTFE loose, max. 160°C
Control Function Double acting (DA) (with opening spring) Normally closed (NC) Normally open (NO)
Actuator Size2
Actuator size 0 (diaphragm size 8) Actuator size 1 (diaphragm size 10) Actuator size 2 (diaphragm size 25) Actuator size 3 (diaphragm size 40) Actuator size 4 (diaphragm size 50)
Design (actuator) Actuator version D Actuator version T
Spring Set For higher operating pressure Standard
Surface Finish3 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.
Working Temperature Max. 150 ºC

Control Medium

Control Medium Inert Gases
Max. Perm. Temperature of Control Medium 70 ºC
Filling Volume Actuator size 0T1: 0.009 dm3 Actuator size 0TA: 0.012 dm3 Actuator size 1: 0.031 dm3 Actuator size 2: 0.124 dm3 Actuator size 3: 0.230 dm3 Actuator size 4: 0.493 dm3

Note

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 (except PTFE/FPM convex PTFE loose, max. 150°C)
  • 2 Actuator size 0, 1, 2 have standard autoclave capability.
  • 3 Ra acc. to DIN 4768; at defined reference points.