Stem Packing
Stem packing performs one or both of the following two functions, depending…
API Trim Materials
Rising Stem with Inside Screw. The threaded part of the stem is inside…
Non-pressure Retaining Parts.
Valve seat(s), stem, yoke, packing, gland bolting, bushings, handwheel, and valve actuators…
Selected Materials of Construction for Valves
Valve trim parts may be constructed of assorted materials because of the…
Valves Body Materials and Available End Connections
Bonnet or Cover Bolting. Bolting includes bolts, nuts, and washers. The bolting…
Major Valve Parts
Pressure Retaining Parts Valve body, bonnet or cover, disc, and body-bonnet bolting…
Cold Working Pressure (CWP) Rating.
Valves are also rated by the CWP rating. This rating represents the…
Classification of Valves
The following are some of the commonly used valve classifications: Classification Based…


