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 650

Pneumatically operated diaphragm valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ 650 2/2-way diaphragm valve has a stainless steel piston actuator and is pneumatically operated. The valve is designed for use in a sterile environment. All metallic actuator components are made of stainless steel. The compression springs of diaphragm sizes 80 and 100 are made of epoxy coated spring steel. Normally closed (NC), Normally open (NO) and Double acting (DA) control functions are available. An integral optical position indicator is standard.

  • Autoclave capability
  • CIP/SIP capable
  • Optional flow direction and installation position
  • Suitable for inert, corrosive, liquid and gaseous media
  • Hermetic separation between medium and actuator
  • Connection: Clamp; Flange; Spigot; Threaded socket; Threaded spigot
  • Actuator: Pneumatic
  • ATEX
  • Explosion protection
  • Body material: 1.4408, investment casting; 1.4435, forged body; 1.4435, investment casting; 1.4539
  • Max. operating pressure: 10 bar
  • Max. media temperature: 100 ° C
  • Min. media temperature: -10 ° C
  • Nominal sizes: DN 4; DN 6; DN 8 (1/4''); 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'')
  • Control valve

Connection types: Clamp | Flange | Spigot | Threaded socket | Threaded spigot

Operation: Pneumatic

Valve body materials: 1.4408, investment casting | 1.4435, forged body | 1.4435, investment casting | 1.4539

Operating pressure: 0 to 10 bar

Media temperature: -10 to 100 °C

Nominal sizes: DN 4 to 100

ATEX: Yes

Explosion protection: Yes

Control valve: Yes

Fitting Accessories

Product video

Diaphragm replacement for GEMÜ 650 with diaphragm code 5E

07:13 min
805 Views
Online since 04.04.2018
More videos
production plant for liquid
Further applications

Product applications

production plant for liquid

In a new and fully automated plant various liquid pharmaceutical products are produced and stored. Each of the three production tanks with a content of 500, 1000 and 2000 litres respectively can be connected with each of the 5 storage tanks ( 2 x 1000, 3 x 2000 l) by means of a change over system. Up to three different production steps are possible. As the products are also exported to the USA, the plant is designed to cGMP and approved by FDA. Planning and construction of the plant are based on the latest directives and standards.

Product news

More news
06.02.2019

Safe solutions for oxygen applications

Find out more

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