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GEMÜ 491 Edessa

Pneumatically operated butterfly valve

  • Description
  • Features
  • Technical specifications

Die GEMÜ 491 PTFE seal butterfly valve has a metal actuator and is pneumatically operated. The disc and shaft are one piece; the body and liner are available in different designs. The butterfly valve is available in nominal sizes DN 40–900 (1½"–36") and in wafer and lug body versions.

  • Suitable for isolating and control functions with gaseous and liquid media
  • Seal material TFM™ (FDA 21CRF 177.1550)
  • Installation length acc. to ISO 5752/20, EN 558-1/20, JIS 10K
  • ATEX version available as an option
  • TA-Luft compliant
  • Extensive applications using a variety of materials
  • Connection: Flange
  • Actuator: Pneumatic
  • Seal material
  • Body material: ; 1.4301, stainless steel; EN-GJS-400-18-LT; S355J2G3 steel
  • Conformities: EAC; FDA; TA Luft (German Clean Air Act)
  • Max. operating pressure: 10 bar
  • Max. media temperature: 200 ° C
  • Min. media temperature: -20 ° C
  • Nominal sizes: DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600

Product video

How butterfly valves work

00:38 min
879 Views
Online since 16.09.2015
More videos
GEMÜ valves in plants for modern sludge recycling
Further applications

Product applications

GEMÜ valves in plants for modern sludge recycling

Large sewage clarification plants, such as the urban drainage department of Stuttgart, recycle their sludge in mono-combustion plants. GEMÜ valves in the plant design ensure the safety and reliability of processes when it comes to drying sludge.