High Temperature Ball Valves
High Temperature Ball Valves
(OP)
Got an application for high temperature ball valves, design temperature 550C,used on gases hydrogen, ammonia also needs to meet full vacuum shutoff, any ideas for starters?
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RE: High Temperature Ball Valves
https://www.velan.com/en/products/type-l-high-temp...
RE: High Temperature Ball Valves
ValvTechnologies https://www.valv.com/
Mogas Industries https://www.mogas.com/en-us
*** Per ISO-4126, the generic term
'Safety Valve' is used regardless of application or design ***
*** 'Pressure-relief Valve' is the equivalent ASME/API term ***
RE: High Temperature Ball Valves
Extra attention on sealing material/quality is highly suggested.
Graphite packing usually consist of graphite (93 to 99% purities) with bonding agent such as Zinc, PTFE, etc. Please note that Zinc start to become permeable above 200 degC and PTFE above 210 degC. These numbers often differed or debated amongst packing supplier and end-user.
Therefore I would suggest to choose the purest graphite possible.
Not all TapcoEnpro, JamesWalker, ERIKS, etc. sealing components are suitable for high temperature application. Ask for burning and/or aging test result if possible.
I had some incidents on 93% graphite being exposed to 480degC and showing gland extrusion/intrusion after only several cycles.
Companies mentioned above by Tbe Obturator and TugBoat are quite ok. IMI group (they have acquired some ball valve companies) are worth considering as well.
Regards,
D
RE: High Temperature Ball Valves
RE: High Temperature Ball Valves
I have positive experiences with the linked below factory, but not with high temperature valves, or for hydrogen. I would suggest that you search for North Sea offshore valve suppliers. Study of details/samples below might help you-
https://www.valmet.com/flowcontrol/valves/ball-val...
https://www.valmet.com/flowcontrol/valves/ball-val...