High temperature valves

[itsmoked]

I'm not having any success finding high temperature valves. As usual I'm probably not calling them what the industry might.

I have to closed-loop control the temperature of two rollers and an asphalt tray. They're heated with 440°F/230°C oil.
I need some sort of analog style valves of about any kind that will put up with that heat. Motor operated might make the most sense? Something around 3/4" to 1".

What do you know?

Keith Cress
kcress -

http://www.flaminsystems.com

 

[TugboatEng]

There is nothing challenging about your application. Usually the actuator is separated from the high temperature by a long stem. There was a manufacturer that made pneumatic operated diaphragm control valves that was so ubiquitous their name became a coloquialism for control valves but I'm drawing a blank on it right now. This type of valve is likely what you're looking for.

http://www.machineryspaces.com/pneumatic-control-valve.html

 

[MJCronin]

Consider posting in the "Valve Engineering" Forum for better sets of eyes ....

MJCronin
Sr. Process Engineer

 

[MacGyverS2000]

A Google search on "hot oil valve" turned up a number of useful data points, Keith, including a ThomasNet link:

https://www.thomasnet.com/products/thermal-oil-valves-91400804-1.html

I assume you're looking for something similar to these:

Dan - Owner

http://www.Hi-TecDesigns.com

 

[danw2]

Fisher is the iconic name in control valves, now owned by Emerson.
Link

 

[TugboatEng]

440°F oil isn't particularly challenging in terms of sealing. Heck, these are control valves so they may not even need tight shut off capability. 440°F is certainly above the flash point of most oils I come across. In that case some sort of backup seal and leakage monitoring may be necessary.

 

[MacGyverS2000]

Dreamchaser,

Every post you have on these fora suggest machinable glass ceramic as the answer to people's woes. You admit in another thread you're helping a buddy market the material. These fora are not your personal marketing venue.

Dan - Owner

http://www.Hi-TecDesigns.com

 

[itsmoked]

Tug; Are these things usually globe valves?

MJCronin; I did not know a valve forum existed. Well dang, it's fairly active even.

Dan; Swear I tried that with useless results but "hot oil valves" is working pretty good. Thanks.

danw2; I've used Fisher many times, only for water though. Did not know they'd been slurped up by Emerson.

Keith Cress
kcress -

http://www.flaminsystems.com