×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

High temperature solenoid valve +200C

High temperature solenoid valve +200C

High temperature solenoid valve +200C

(OP)
I am looking for small direct acting soienoid valves for steam at low pressures. Orifice size 2mm to 5 mm.

I have used below valves with PTFE with some sucess.

http://www.betavalve.com/cms/cms.jsp?menu_id=8603&...

Problem is valve may be subject to higher temperatures than 170C for short periods (1-3 sec) that may be detrimental to valve.

Function is to evacuate to athmosphere steam from a chamber that could be running at 600C . At the end of evacuation super heated gas and steam measured around 300C for short periods.

Without adding countermeasures to protect valve does anybody know of a relatively inexpensive valve that can take these temperatures.

Needs to be relatively fast ( less the 0.5 sec). Pressure (0-10 bar) normally (0-3 bar).

Normally open to evacuate.

Many thanks

RE: High temperature solenoid valve +200C

You're probably asking too much of the elastomers that such valves require to function properly. Although Kalrez and similar high tech perfluoroelastomers exist, and can handle DRY gas to 300 C, their Achilles' heel is steam.

The valve construction for your conditions is no problem- the trouble is the solenoid actuation, which exerts so little force that it needs elastomers to have a hope of sealing.

RE: High temperature solenoid valve +200C

A valve that uses a seal of an elastomer compound or PTFE will not be suitable for even brief exposure to intimate contact with fluid temperatures of 600degC. There are elastomers that can tolerate extended exposure to temps of 350degF. PTFE can tolerate exposure to 400degF, except that it will suffer creep. The only type of valve that can tolerate the temperatures and pressures you require are all-metal valves.

RE: High temperature solenoid valve +200C

(OP)
Many thanks.

Can anyone know a manufacturer of all metal solenoid valves that would be ecconomical for domestic products? 2-5 mm orifice.

So far all I have found is large industrial valves for plant and similar.

Yours,

Alan

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources