Quick closing Isolation valves: How does a "flow actuated isolation valve" compare?

Posted in: , on 27. Aug. 2015 - 18:45

I am looking for advice about a 10 bar rated Explosion isolation valve of some kind. I operate within the normal flow limitation of the VENTEX passive "flow actuated isolation valve" (aka Float isolation valve) and the isolation valve will be mounted downstream of a 300 F baghouse on a very humid stream that is going to be cooling, since it is not insulated. Specifically:

  • What has been the end user experience with the passive type of isolation device? It's reliability?
  • Pro or cons Vs the Explosion Isolation valves (slide gate) that require an active sensor system?
  • Are there other brands for the passive valve (a USA source would be nice).



FYI - The one brand I found is the VENTEX ESI-E valve, manufactured by RICO in Europe. http://www.rico.ch/en/explosionsschu...sschutzventile

Thanks in advance for your time and expertise.

Gary ■

Baghouses Dust Collectors
Dust Collection Systems
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Environmental Control Equipment
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Explosion Isolation
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Explosion Isolation Valves
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Re: Quick Closing Isolation Valves: How Does A "Flow Actuated I…

Posted on 23. Sep. 2015 - 08:41
Quote Originally Posted by hollergView Post
I am looking for advice about a 10 bar rated Explosion isolation valve of some kind. I operate within the normal flow limitation of the VENTEX passive "flow actuated isolation valve" (aka Float isolation valve) and the isolation valve will be mounted downstream of a 300 F baghouse on a very humid stream that is going to be cooling, since it is not insulated. Specifically:

  • What has been the end user experience with the passive type of isolation device? It's reliability?
  • Pro or cons Vs the Explosion Isolation valves (slide gate) that require an active sensor system?
  • Are there other brands for the passive valve (a USA source would be nice).



FYI - The one brand I found is the VENTEX ESI-E valve, manufactured by RICO in Europe. http://www.rico.ch/en/explosionsschu...sschutzventile

Thanks in advance for your time and expertise.

Gary

Hi Gary,

I believe I can help you with your current application. I work for REMBE, Inc. and we are a supplier of the Ventex system here in the U.S.

For your specific application, the only two devices that would work are the Ventex or Knife Gate system. Please find my answers below to your above questions:

  • The Ventex valves are extremely well built and are certainly a reliable system. Some have been installed at customer locations for a number of years. They are designed for clean air use which is why they are great valves for applications on clean air exhausts of dust collectors.
  • Pros: The Ventex valve is a passive system so there is no triggering device or control system. The only requirement is to signal the dust collector when an event as occurred. This can be done through the proximity switch on the valve. The Ventex valve is generally cheaper then a Knife Gate system. The maintenance is also generally easier then for a Knife Gate system. Cons: The Ventex valve is not well suited for dust loading where a Knife Gate can handle such applications.
  • The only passive isolation device which is rated for 10 bar is a Ventex valve. The only other option which can handle that high of a pressure would be a Knife Gate system.



Does this help you for your current application?

-Eric Finley ■