What is Valve Trim

The operating parts of a valve which are normally exposed to the process fluid are referred to as ‘valve trim’. Usually these parts are subject to wear and degradation and hence are replaceable. Usually parts like stem, disc or wedge, closure member, seating surface etc. are called as valve trim. The parts such as body, bonnet, yoke etc. are not considered as trim.

Type of ValvesValve Trim
Angle ValvesStem, Seat, Disc, Disc Nut, Back-Seat Bushing
Disc ValvesDisc, Disc Nut, Back-Seat Bushing
Gate ValvesStem, Seat, Wedge, Back-Seat Bushing
Globe ValvesStem, Seat, Disc, Disc Nut, Back-Seat Bushing
Lift Type Check ValvesSeat Ring, Disc, Disc Guide
Swing Type Check ValvesSeat Ring, Disc, Disc Holder, Disc Holder Pin, Disc Nut, Disc Nut Pin, Side Plug, Carrier Pin

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