Packing for 1300 ¦F Valve
Packing for 1300 ¦F Valve
(OP)
I have a valve application where a 10" class 150 butterfly valve is in a service that operates at 1300 °F, has 14% oxygen, 7% SO2, and balance N2 in the process stream. Valve steam leaks are a real problem. Conventional graphite packing oxidizes and disappears above 900 °F, which we have proved. Does anyone have any suggestions for alternate packing materials?
My other option is a re-designed custom valve with extended bonnet to get the packing away from the intense heat.
My other option is a re-designed custom valve with extended bonnet to get the packing away from the intense heat.





RE: Packing for 1300 ¦F Valve
Master Flo www.masterflo.com/Products/Other/seals.html
has a metal stem seal but I don't know how well it works and doubt they'd sell it to a competitor. You could try metal C rings or U-cups but I'm betting they would eventually wear.
The only other thing I can think of is asbestos, but there aren't very many places left that still allow it to be used.
RE: Packing for 1300 ¦F Valve
RE: Packing for 1300 ¦F Valve
RE: Packing for 1300 ¦F Valve
RE: Packing for 1300 ¦F Valve
John Crane
Sepco
Garlock
Raybestos