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There are a number of names for particular types of valve:

• Ball cock, often used as a water level controller ( cistern )
• Ball valve, which is good for on/off control.
• Bibcock
• Butterfly valve, particularly in large pipes
• Cock, colloquial term for a small valve
• Gate valve, mainly for on/off control
• Globe valve , which is good for regulating flow.
• Hydraulic valve (diaphragm valve)
• check valve or Non-return valve, allows the fluid to pass in one direction only
• Pilot valve s regulate flow or pressure to other valves.
• Plug Valve , for on/off control
• Solenoid valve, an electrically controlled hydraulic or pneumatic valve
• Tap ( British English), Faucet ( American English) is the common name for a valve used in homes to regulate water flow.
• Rotary valves and piston valves are parts of brass instruments used to change their pitch.

Different valves may be used for a variety of purposes:

• A flow control valveA valve which regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such as flow meters, temperature gauges, etc. Control valves are normally fitted with actuators and positioners. Pneumatic maintains a constant flowrate through the valve.
• A heart valveIn anatomy, the heart valves are valves in the heart that prevent blood from flowing the wrong way. There are four valves of the heart: Two atrioventricular (AV) valves ensure blood flows from the atria to the ventricles, and not the other way. Two semilu regulates blood flow through the heartThis page is about the muscular organ, the Heart . For other meanings of the word, see Heart (disambiguation). The heart ( Latin cor is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. The term cardia in many organisms.
• A poppet valveA poppet valve is the type of valve system used in most piston engines, used to seal the intake and exhaust ports. The valve is usually a flat disk of metal with a long rod known as the valve stem out one end. The stem is used to push down on the valve an is commonly used in piston engines to regulate the fuel mixture intake and exhaust. The sleeve valveSleeve valves are a way of building valves for piston engines that have a number of advantages over the more common poppet valve, used in most engines, as well as disadvantages that have precluded their widespread adoption. Sleeve valves were used in some is another valve type used for this purpose.
• A pressure reducing valve reduces pressure to a preset level downstream of the valve.
• A pressure sustaining valve maintains pressure at a preset level upstream of the valve.
• A regulator is used in SCUBA diving equipmentA diving regulator is a device used by a SCUBA diver in an Aqualung to supply the diver with breathing gas at ambient pressure from a high pressure diving cylinder. Parts of a regulator The main components of a diving regulator are: the first stage the hi and in gas cooking equipment to reduce the high pressure gas supply to a lower working pressure
• A safety valve or relief valve operates automatically at a set differential pressure to correct a potentially dangerous situation, typically over-pressure.
• A three way valve routes fluid from one direction to another.