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Pneumatically operated diaphragm valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ R690 2/2-way diaphragm valve has a low maintenance membrane actuator and is pneumatically operated. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) control functions are available. The High-Flow valve body provides compact dimensions at high flow rates.

  • Same mounting height planes over multiple nominal sizes
  • Compact plant design due to flow optimised valve bodies
  • Reduced control air consumption
  • Varied optional accessories for measurement and control
  • Connection: Flange; Spigot; Union end
  • Actuator: Pneumatic
  • Body material: ABS; Inliner PP-H, grey / outliner PP, reinforced; Inliner PVDF / outliner PP, reinforced; PP (GF); PVC-U; PVDF
  • Max. operating pressure: 10 bar
  • Max. media temperature: 80 ° C
  • Min. media temperature: -20 ° C
  • Nominal sizes: 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'')
  • Control valve

Fitting Accessories

Product video

How diaphragm valves with plastic valve bodies work

00:33 min
Online since 16.09.2015
Gravel filtration plant and ion exchangers for treatment of waste water from electroplating plants

Product applications

Gravel filtration plant and ion exchangers for treatment of waste water from electroplating plants

Metallic surface coating of workpieces and objects is generally performed to protect them from corrosion or wear. However, coatings can also be used to achieve certain functional characteristics, such as electrical conductivity, or may also be applied with the aim of producing visually attractive surfaces. In electroplating plants, workpieces are dipped into various process baths for this purpose. The different stages of the process consist of pre-treatment, metallisation and posttreatment. Ion exchangers are often used in electroplating plants to treat raw water for production purposes or to bind the substances contained in the various types of rinse water so that clean water can be fed back into the process. However, ion exchangers are also used in waste water treatment as the last stage of cleaning before the cleaned waste water can be fed into the local sewerage system. Flow optimised GEMÜ R690 diaphragm valves and robust GEMÜ 800 fl owmeters are used both in the upstream gravel filtration plants and in the ion exchangers operated by PWM Service GmbH.