Manual Valve
Double Block and Bleed Ball Valve
Double block and bleed ball valves saves space, weight, and labor costs where possible, while still retaining the original function of the valve....
Stainless Steel Valves
Corrosion-Resistant Alloys The least corrosion-resistant alloy is normally thought of as steel AISI type 304 (18 Cr, 10 Ni). Stainless steel AISI type 316 (18 Cr, 12 Ni, ...
Ball Valve
Ball valves are a species of plug valves having a ball-shaped closure member. The seat matching the ball is circular so that the seating stress is circumferentially unifo...
Wedge Gate Valve
Wedge gate valves differ from parallel gate valves in that the closure member is wedge-shaped instead of parallel, as shown in Figure 3-34 through Figure 3-45. The purpos...
Globe Valves
km Globe valves are closing-down valves in which the closure mber is moved squarely on and off the seat. It is customary to refer to the closure mber as a disc, irrespect...
Valve Selection Criteria
The method by which the closure mber regulates the flow and the configuration of the flow path through the valve impart a certain flow characteristic to the valve, which is t...
Diaphragm Valves
Diaphragm valves are flex-body valves in which the valve body consists of a rigid and flexible section. The flexible body section is provided by a diaphragm, which, in co...
Pinch Valves
Pinch valves are flex-body valves consisting of a flexible tube that is pinched either mechanically, as in the valves shown in Figure 3-88 through Figure 3-90....
Butterfly Valves
Butterfly valves are rotary valves in which a disc-shaped closure member is rotated through 90°, or approximately, to open or close the flow passage. The butterfly valves...
Plug Valves
Plug valves are rotary valves in which a plug-shaped closure member is rotated through increments of 90° to engage or disengage a porthole or holes in the plug with the p...
Parallel Gate Valves
Parallel gate valves are slide valves with a parallel-faced gate-like closure member. This closure member may consist of a single disc or twin discs with a spreading mech...
Piston Valves
Piston valves are closing-down valves in which a piston-shaped closure member intrudes into or withdraws from the seat bore, as in the valves shown in Figure 3-20 through...
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Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)