Vaccum sealing arrangement in valves
Vaccum sealing arrangement in valves
(OP)
Can anybody please clarify "Vaccum sealing arrangement in valves".
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Vaccum sealing arrangement in valves
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Vaccum sealing arrangement in valvesVaccum sealing arrangement in valves(OP)
Can anybody please clarify "Vaccum sealing arrangement in valves".
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RE: Vaccum sealing arrangement in valves
In such case, differential pressure is reversed. You shall insure your valve sealing arrangement works in reverse way too. It is not the case for lip seals or chevron type seals.
Particular care shall be also considered with O'rings in high pressure designs.
For standard Gate valve, I don't see any problem as far as packing is design for.
RE: Vaccum sealing arrangement in valves
Can you please clarify water sealing arrangement requirement in gate, globe valves
RE: Vaccum sealing arrangement in valves
In addition, a "lantern ring" may be used to prevent air leakage through the stem packing. The "lantern ring" also requires a water supply.
RE: Vaccum sealing arrangement in valves
In the past, there is Royal-Dutch SHELL MESC specification for vacuum service. Afterward, the end-user expired this specification since the most of gland packing/ seal can withstand reverse pressure, i.e. from atomospheric to valve internal in vacuum condition. Unless otherwise the external pressure of the valve is higher than atomospheric, I think this reference can be applicable to your situation.
If your situation is more complicate, I would adivse you to tell members more details of application. Perhaps, I can check more concrete condition to close to your expectation.
Best regards,
RE: Vaccum sealing arrangement in valves
Can you suggest vendors who can offer sealing water arrangement for Gate/ Globe valves
RE: Vaccum sealing arrangement in valves
RE: Vaccum sealing arrangement in valves