basic 3 min read
Valve Categories
Stop (Isolation) Valves As the name implies, stop valves are used to stop flow or isolate a portion of the…
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basic 3 min read
Stem Packing
Stem packing performs one or both of the following two functions, depending on the application: ● Prevent leakage of flow…
basic 2 min read
API Trim Materials
Rising Stem with Inside Screw. The threaded part of the stem is inside the valve body, and the stem packing is…
basic 3 min read
Non-pressure Retaining Parts.
Valve seat(s), stem, yoke, packing, gland bolting, bushings, handwheel, and valve actuators are some of the major non- pressure retaining…
basic 1 min read
Selected Materials of Construction for Valves
Valve trim parts may be constructed of assorted materials because of the different properties needed to withstand different forces and…
basic 2 min read
Valves Body Materials and Available End Connections
Bonnet or Cover Bolting. Bolting includes bolts, nuts, and washers. The bolting to be used must be made from materials…
basic 2 min read
Major Valve Parts
Pressure Retaining Parts Valve body, bonnet or cover, disc, and body-bonnet bolting are classified as pressure retaining parts of a…
basic 3 min read
Cold Working Pressure (CWP) Rating.
Valves are also rated by the CWP rating. This rating represents the maximum allowable working pressure at the ambient temperature…
basic 3 min read
Classification of Valves
The following are some of the commonly used valve classifications: Classification Based on Mechanical Motion Based on the mechanical or…
