Needle Valves
Needle valves generally are used for instrument, gauge, and meter line service.…
Construction of a Globe Valve
A typical large globe valve with flanged ends is illustrated in Fig.…
Globe Valves
Conventional globe valves may be used for isolation and throttling services. Although…
Pressure Binding
Sometimes in high-temperature applications, the flow medium, such as water or steam,…
Construction of a Gate Valve
Gate valves consist of three major components: body, bonnet, and trim. The…
Valve Types
Gate Valves Gate valves are primarily designed to serve as isolation valves.…
Valve Categories
Stop (Isolation) Valves As the name implies, stop valves are used to…
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…


