GEMÜ 687

Pneumatically operated diaphragm valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ 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.

  • Hermetic separation between medium and actuator
  • CIP/SIP capable
  • Wide range of adaptation options for add-on components and accessories
  • Suitable for particulate and abrasive media
  • Stainless steel body suitable for corrosive environments
  • Wide range of adaptation options for add-on components and accessories
  • Media temperature:-20 to 120 °C
  • Sterilization temperature:max. 150 °C
  • Ambient temperature:-10 to 60 °C
  • Operating pressure :0 to 10 bar
  • Nominal sizes:DN 10 to 100
  • Body configurations:2/2-way body | Tank valve body | T-body
  • Connection types:Clamp | Flange | Spigot | Threaded connection
  • Connection standards:ANSI | ASME | BS | DIN | EN | ISO | JIS | NPT | SMS
  • Body materials:1.4408, investment casting material | 1.4408, investment casting material, PFA lined | 1.4435 (316L), forged material | 1.4435 (BN2), forged material | 1.4435, investment casting material | 1.4539 (904L), forged material | 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
  • Body lining:Hard rubber | PFA | PP
  • Diaphragm materials:EPDM | FKM | PTFE
  • Conformities:3A | Belgaqua | CRN | EAC | FDA | FMEDA | Oxygen | Reg. (EU) No. 10/2011 | Regulation (EC) No. 1935/2004 | TA Luft (German Clean Air Act) | USP

Fitting Accessories

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Valve solutions for mixing electrode slurries
Further applications

Product applications

Valve solutions for mixing electrode slurries

The first step in the manufacture of lithium-ion battery cells is to mix the electrode slurries, which are then applied to the electrode foils (anode/cathode) as a layer in the next step. The slurry comprises a mixture of active materials, solvents, binders and additives. When mixing slurry, it is particularly important to feed in the different components in precisely the correct quantities. GEMÜ has the appropriate valves, measurement and control systems to ensure the process reliability of this manufacturing step. Find out more about the slurry mixing process and how GEMÜ supports you with expert solutions in this application flyer.

Product news

More news
09.04.2018

New tutorials on replacing two-piece diaphragms

The GEMÜ training team has already published a number of videos in recent years on specific content such as replacing wearing parts.
Find out more