16" Butterfly Valve @ 1800F & 75psia.

[22west]

Any recommendations of a supplier for a valve under these conditions? Has anyone seen of these in the field?
I have been to several vendors and have currently found only one supplier - the shaft and stuffing box are air cooled.

 

[unclesyd]

If you have a supplier that can supply a valve to your specifications you had better jump on them and start talking.
The only thing I've seen that operates at your temperature is a damper working at few inches of water.

 

[insult2injury]

Most triple offset designs that I'm familiar with are only rated to 1400 or 1500 F.

I2I

 

[22west]

I should also add that this is a standard butterfly - no offsets - the shaft and vane are coincident with the centerline of the pipe. It is not intended that this valve fully close and seal - it's main function is only to create a backpressure.

 

[JimCasey]

I have had some dealings with Everest valve in Houston. Their business is to fab up a one-off valve for a weird application.
It will help if you know what materials will be acceptable for the process conditions.

 

[bcd]

ANother option is to contact MAPAG in Germany. They specialized in Engineering and manufacturing specialty valves for demanding applications.

 

[11906878p]

Try to get in touch with VALVULAS JOLA in Spain. They manufacture butterfly valves for high temperatures.

 

[bgreggs]

Contact PDC Valve at

http://www.pdcvalve.com

 

[JLSeagull]

http://www.zjinc.com/

Try Zimmermann & Jansen.

 

[ApC2Kp]

22west,

The butterfly valve is probably like a damper, as pointed out by unclesyd. I would visualize it as a swing thru disk fabricated steel castable lined butterfly valve.

Try suppliers Mader, Frischkorn, or Bloem Civieltechniek BV.

 

[roydm]

I used something similar on a Hydrogen skid. It gave nothing but trouble. I came to the conclusion that we would have been better off designing our own damper. I would start with a piece of pipe and weld a bush one side (no opposite bush). The shaft needs lots of clearance or it will bind when hot. Just make a simple butterfly with about 1/8" clearance. You might be better just to support the disk from the gland side
Keep the actuator well away from the line e.g. 12" otherwise the heat will effect the seals and allow for thermal expansion.
Too hot for Carbon steel, Stainless is better.
Good Luck
Roy

 

[JimCasey]

roydm brings up a good point.
The man with the money gets the experience.
The man with the experience gets the money.

If you are not already speaking with some of the manufacturers listed above, you should be. If these guys have done it before, they know what won't work, too.

I suspect you will hear the word "Inconel" mentioned as a material, if not 347 Stainless.

Mounting the shaft horizontal will help keep the packing and the actuator out of the convected heat. You will need a pretty long extension, and a radiation shield is also a good idea just to keep radiant heat off the actuator.

Most heat gets to the actuator through the coupling. Stainless steel is a poor thermal conductor. Hence: Use a stainless coupling. An extra couple hundred dollars for Viton seals in the actuator is also worth it.