This website uses cookies.

On our web pages and in our online shop, we use strictly necessary cookies and cookies that are needed to process your queries. We also use tracking cookies, which help us to optimize our online presence and offer you a better browsing experience as a result. ...

You can find further information in our Data Protection Statement. Data protection statement

OK Personal settings more
Functional cookies

These cookies are strictly necessary to enable you to use all the functions and features of GEMÜ web pages. Consequently, they are enabled by default and cannot be disabled. If you wish to avoid these cookies, you can do so by changing the settings in your browser.

Web analysis cookies

Here you can decide whether you want to allow a unique web analysis cookie to be stored in your browser that will enable the website operator to record and analyse various statistical data. If you do not want to allow this, click on the following link to store the Piwik opt-out cookie in your browser.

Unfortunately, GEMÜ is currently unable to store settings for multiple browsers or about multiple user accounts. It is also possible that, irrespective of the security settings you have set in your browser, the cookies set by GEMÜ will be deleted when you close the browser and will therefore no longer be available in your next session. If you close or change your browser, or if you use more than one PC, you may have to make some of the changes again.

GEMÜ 490 Edessa

Butterfly valve with bare shaft

  • Description
  • Features
  • Technical specifications

The GEMÜ 490 PTFE seal butterfly valve has a bare shaft. 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: With bare shaft
  • 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; DN 700; DN 900; DN 1000

Product video

How butterfly valves work

00:38 min
658 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.