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The GEMU 671 manually operated 2/2 way metal diaphragm valve has a plastic bonnet and an Integral optical position indicator as standard.

Features
  • Suitable for inert and corrosive liquid and gaseous media
  • Valve body and diaphragm available in various materials and designs
  • Various connections available
  • Insensitive to particulate media
  • Surface finishes down to 0.25µm, electropolished
  • Compact design (when space is at a premium)
Advantages
  • Due to its modular design one diaphragm and one bonnet is used for each modular size range 15/20/25 and 32/40, thus minimizing stocks of valve spares.
  • Hermetic sealing
  • Optional flow direction, will seal in either flow direction up to full working pressure
  • Optional mounting position
  • Optional accessories
    Electrical remote indication that the valve is in the open position
    Lockable handwheel clamp

Specifications

Type 671
Nominal Size DN 100 DN 15 DN 20 DN 25 DN 32 DN 40 DN 50 DN 65 DN 80
Body Configuration Straight through
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 EN ISO 1127 Butt Weld Spigots JIS-G 3447 Butt Weld Spigots JIS-G 3459 Butt Weld Spigots SMS 3008 Clamp ASME BPE for pipe ASME BPE length EN 558-1, series 7 Clamp ASME BPE for pipe ASME BPE, short design Clamp DIN 32676 for pipe DIN 11850 length EN 558-1,series 7 Clamp following ASME BPE for pipe EN ISO 1127, length EN 558-1 series 7 Clamp SMS 3017 for pipe SMS 3008 length EN 558-1, series 7 Flanges ANSI B 16.5, class 150 RF, length EN 558-1, series 1 Flanges ANSI B 16.5, class 150 RF, length MSS SP-88 Flanges DIN 2501, form C, length EN 558-1, series 1 One side threaded spigot, other side cone spigot and union nut, DIN 11851 Threaded Sockets DIN ISO 228 Threaded spigots DIN 11851
Valve Body Material 1.4408 Cast stainless steel 1.4408 Investment casting PFA lined 1.4435 (316L) Forged stainless steel 1.4435 (ASTM A 351 CF3M) investment casting (Material equivalency 316 L) EN-GJL-250, GG 25 (CI) EN-GJS-400-18-LT, GGG 40.3 (SG iron) PFA lined EN-GJS-400-18-LT, GGG 40.3 (SG iron) PP lined
Diaphragm Material EPDM EPDM EPDM FPM PTFE/EPDM convex, PTFE loose PTFE/EPDM, PTFE laminated PTFE/FPM convex, PTFE loose PTFE/Silicone convex, PTFE loose
Control Function Manually Operated Manually operated (lockable handwheel)
Accessory Threaded connection for position indicator
Surface Finish1 Ra ≤ 0.25µm, electropolished internal/external Ra ≤ 0.25µm, mechanically polished internal, blasted external Ra ≤ 0.4µm, electropolished internal/external Ra ≤ 0.4µm, mechanically polished internal, blasted external Ra ≤ 0.6µm, electropolished internal/external Ra ≤ 0.6µm, mechanically polished internal, blasted external Ra ≤ 0.8µm, electropolished internal/external Ra ≤ 0.8µm, mechanically polished internal, blasted external Ra ≤ 6.3µm, blasted internal/external Ra ≤ 6.3µm, electropolished internal/external

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.
Working Temperature2 Max. 80 ºC
Max. Ambient Temperature 60 ºC
  • 1 Ra ace. to DIN 4768; at defined reference points
  • 2 Depending on the application.