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The GEMU 620 pneumatically operated 2/2-way diaphragm valve has a low maintenance membrane actuator which can be controlled by inert gaseous media.

Features
  • Suitable for inert and corrosive liquid and gaseous media
  • Insensitive to particulate media
  • Valve body and diaphragm available in various materials and designs
Advantages
  • Optional flow direction, will seal in either flow direction up to full operating pressure
  • Good flow capability
  • Accessories:
    • Stroke limiter
    • Optical position indicator
    • Manual override
    • Pilot valve with manual operation
    • Electrical position indicator
  • Pneumatic or electro-pneumatic positioners

Specifications

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Type 620
Nominal Size DN 100 DN 125 DN 15 DN 150 DN 20 DN 25 DN 32 DN 40 DN 50 DN 65 DN 80
Body Configuration 2/2-Way
Connection
Flanges ANSI class 125/150 FF length EN 558-2, series 7 ISO 5752, basic series 7 (ex BS 5156) Flanges ANSI class 125/150 RF length EN 558-2, series 1 ISO 5752, basic series 1 (ex DIN 3202-1, series F1) Flanges ANSI class 125/150 RF length EN 558-2, series 7 ISO 5752, basic series 7 Flanges ANSI class 125/150 RF length MSS SP-88 Flanges BS 10 Table "E" length EN 558-1, series 7 ISO 5752, basic series 7 Flanges EN 1092 -PN10 -form A (ex DIN 2501 / PN10 / form A) length EN 558-1, series 7 ISO 5752, basic series 7 (ex BS 5156) Flanges EN 1092 -PN10/16 -form A (ex DIN 2501 / PN16 / form A) length EN 558-1, series 7 ISO 5752, basic series 7 (ex BS 5156) Flanges EN 1092 -PN10/16 -form B, (ex DIN 2501 / PN16 / form C) length EN 558-1, series 1 ISO 5752, basic series 1 (ex DIN 3202-1, series F1) Threaded Sockets DIN ISO 228
Valve Body Material EN-GJL-250, GG 25 (Cast iron) EN-GJL-250, GG 25 (cast iron) Halar coated EN-GJL-250, GG 25 (cast iron) Hard rubber lined EN-GJS-400-18-LT, GGG 40.3 (S.G. iron) Hard rubber lined EN-GJS-400-18-LT, GGG 40.3 (S.G. iron) PFA lined EN-GJS-400-18-LT, GGG 40.3 (S.G. iron) PP lined EN-GJS-500-7, GGG 50 (S.G. iron) PFA lined EN-GJS-500-7, GGG 50 (S.G. iron) PP lined
Diaphragm Material1 CR, Neoprene CSM, Hypalon EPDM, KTW-approval FPM, Fluorocaoutchouc NBR, Perbunan PTFE/EPDM convex, PTFE loose PTFE/EPDM, fully laminated
Control Function Double acting (DA) Normally closed (NC) Normally open (NO)
Actuator Size
0/D 0/F 0/N 1/D 1/F 1/N 2/D 2/F 2/N 3/1 3/2 3/3 3/D 3/F 3A1 3A2 3A3 3AD 3AF 4A2 4A3 4AD 4AF
Max. Ambient Temperature 60 ºC
Filling Volume Actuator size 0: 0.15 NI Actuator size 1: 0.35 NI Actuator size 2: 1.10 NI Actuator size 3: 2.5 NI Actuator size 4: 6.8 NI

Working Medium

Working Medium Corrosive, inert, gaseous and liquid media which have no negative impact on the physical and chemical properties of the body and diaphragm material.
Max. Perm. Temperature of Working Medium 150 ºC

Control Medium

Control Medium Inert Gases
Max. Perm. Temperature of Control Medium2 40 ºC
  • 1 The combination of PFA or PTFE lining with 5E diaphragms is only conditionally suitable for gaseous media. If low seat leakage rates are required for gaseous media, other combinations are preferable.?
  • 2 Depending on body and diaphragm material.