A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the...

A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening...

A flow control valve regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such as flow...

A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to...

A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole...

both extend and retract using compressed air. The direction control valve is used to control the direction of flow of compressed air. They are usually classified...

variations) is a valve controlling the release of a fluid. Tap is used in the United Kingdom and most of the Commonwealth for any everyday type of valve, particularly...

An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine's...

A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise...

A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration...

VTEC (described as Variable Valve Timing & Lift Electronic Control, but stands for Valve Timing Electronically Controlled[citation needed]) is a system...

Large butterfly valve Butterfly valve DN3000 Check valve Control valve Diaphragm valve Gate valve Globe valve Needle valve Plastic pressure pipe systems...

pressure regulator is a valve that controls the pressure of a fluid to a desired value, using negative feedback from the controlled pressure. Regulators...

The aim when sizing control valves is to find the perfect valve solution for the system.[citation needed] Finding that perfect valve involves understanding...

A level control valve or altitude control valve is a type of valve that automatically responds to changes in the height of a liquid in some storage system...

The active valve control system (AVCS) is an automobile variable valve timing technology used by Subaru. It varies the timing of the valves by using hydraulic...

A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable plug or disc element and a...

low control power and compact design. There are many valve design variations. Ordinary valves can have many ports and fluid paths. A 2-way valve, for...

A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing...

called a "rising stem" valve. These types of valves include globe valves, rising stem ball valves, control valves and gate valves. The two main types of...

A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance...

the lever to close the valve and shut off the water flow. This is an example of negative feedback and of proportional control. When the handle of a flush...

servo valve (EHSV) is an electrically-operated valve that controls how hydraulic fluid is sent to an actuator. Servo valves are often used to control powerful...

position whether the valve is open or closed. Ball valve Butterfly valve Control valve Diaphragm valve Flow limiter Gate valve Globe valve Mass flow controller...

Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve. The...

A pinch valve is a full bore or fully ported type of control valve which uses a pinching effect to obstruct fluid flow. Pinch valves employ an elastic...

A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer...

A sun valve (Swedish: solventil, "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor...

A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little...

valve (commonly abbreviated to APL valve, and also referred to as an expiratory valve, relief valve or spill valve) is a type of flow control valve used...