Gates for knife gate valves.
Ball valve is for on/off control without pressure drop, and ideal for quick shut-off, since a 90° turn offers complete shut-off angle, compared to multiple turns required on most manual valves.
Butterfly Valve
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk.
A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
Choke valve, a valve that raises or lowers a solid cylinder which is placed around or inside another cylinder which has holes or slots. Used for high pressure drops found in oil and gas wellheads
Diaphragm valve, which controls flow by a movement of a diaphragm. Upstream pressure, downstream pressure, or an external source (e.g., pneumatic, hydraulic, etc.) can be used to change the position of the diaphragm.
Gate valve, mainly for on/off control, with low pressure drop, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid
A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.
A pinch valve is a full bore or fully ported type of control valve which uses a pinching effect to obstruct fluid flow.
Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve
