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[MW:13539] RE: 13531] Valve Back Seat Test

By Materials & Welding

Dear Gopi,

Valve back seat tests are done in Gate and globe valves

It's done by opening the valve to the fullest and loosening the packing
gland and pressurizing the shell.

It's done at 1.1 times the maximum allowable pressure at 38 °C (100 °F)

Cheers
MM


-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Gopi Perumal
Sent: Saturday, January 21, 2012 8:01 AM
To: materials-welding@googlegroups.com
Subject: [MW:13531] Valve Back Seat Test

Dear all,

Anybody can explain what is mean by Backseat test in Valve Testing? (API
598)

Thanks,
P Gopi

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