The GEMU 687 2/2-way diaphragm valve has a low maintenance plastic membrane actuator and is pneumatically operated. The valve has a metal distance piece. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) control functions are available.
Features
- Suitable for inert and corrosive liquid and gaseous media
- Chemical resistance of actuator
- Stainless steel body with CIP/SIP cleaning and sterilising capabilities
- Insensitive to particulate media
- Valve body and diaphragm available in various materials and designs
- Various connections available
- Surface finishes down to 0.25 µm, electropolished
- Versions according to ATEX on request
- Optical position indicator is standard for control function 1
Advantages
- The modular actuator system permits a variety of options to be used such as tank bottom valves, T valves, sampling valves, multi-port valves
and tandem welded configurations - Optional flow direction
- Installation for an optimised draining is possible
- Hermetic separation between medium and actuator
- CIP/SIP capable
- Extensive diagnostic facilities
Optional accessories:
- Stroke limiter
- Optical position indicator control function 2 + 3
- Manual override (GEMÜ 1002, GEMÜ 1004)
- Pilot valve with manual override (GEMÜ 0322 – 0326)
- Electrical position indicators
Technical details
- Connection: Clamp; Flange; Spigot; Threaded socket; Threaded spigot
- Actuator: Pneumatic
- Seal material
- Body material: 1.4408, PFA lined; 1.4408, investment casting; 1.4435, forged body; 1.4435, investment casting; EN-GJS-400-18-LT (GGG 40.3), PFA lined; EN-GJS-400-18-LT (GGG 40.3), PP lined; EN-GJS-400-18-LT, hard rubber lined
- Conformities: ; EC regulation 10/2011; EC regulation 1935/2004; FDA; Oxygen; TA Luft (German Clean Air Act); USP
- Max. operating pressure: 10 bar
- Max. media temperature: 100 ° C
- Min. media temperature: -10 ° C
- Nominal sizes: DN 10 (3/8”); DN 12; DN 15 (1/2”); DN 20 (3/4”); DN 25 (1”); DN 32 (1 1/4”); DN 40 (1 1/2”); DN 50 (2”); DN 65 (2 1/2”); DN 80 (3”); DN 100 (4”)
- Pilot valve
- Control valve
- Sterilisation temperature: max. 150 °C
