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A backseat is a seating arrangement inside the bonnet. It provides a seal between the stem and bonnet and prevents system pressure from building against the valve packing, when the valve is fully open. Back seats are often applied in gate and globe valves.
See also
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Accumulator, Annulus, Babbitt, Backflow preventer, Backseat, Bellows, Bonnet, Bore, Bourdon tube, Braze, Check valve, Clam shell, Clevis, Cotter pin, Coupling, Cremone, Damper, Densitometer, Diaphragm, Differential flow, Door closer, Dowel, Fire wrap, Flange, Full out position, Fuller's earth, Galling, Gasket, Gauge, Globe valve, Grommet, Grout, Header, Heat number, Heat trace, Hoop stress, Lagging, Lash adjuster, Louver, Lube oil, Magnatorque, Manifold, Muffin fan, Overtravel, Penetration, Reboiler, Safe end, Shim, Short cycling, Skid... further results |