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VALVES TYPE & FUNCTION

VALVES

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Valves

On-Off Service Throttling (Regulating) Service Prevention of back flow Pressure control (Control Valve)

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ON – OFF SERVICE

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Gate valve.

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Gate Valve :-

ON – Off Valve ,Used in:1-Water.2- Oil.3- Gas4- SteamAnd Other Fluid Services.

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Wedge gate valve and parallel slide valve

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Gate valve 2.

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Plug valve (on-off) or Cock low-pressure

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Plug valve (on-off) or Cock

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Plug valve Applications

Gas and liquid fuel Water. Extreme temperature flow Boiler feed water. Low Pressure Steam . Corrosive Liquids and Gases

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Ball Valve (on-off)

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Ball Valve Quarter-Turn

Hydraulic systems .Water .Air.Oil .Petrochemical .High volume, high pressure and high

temperature flow .

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THROTTLING(Regulating)

SERICE

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Globe Valve (High pressure & value )

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Globe Valve.

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Globe Valve Ops.

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Needle Valve

Fine accurate flow Cont.

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Butterfly Valve

Flow Control Low Speed Both Side flow

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Butterfly Valve 2

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Prevention of back flow

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split disc check

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Split disc check valve operation

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lift check valve (Recommended forVapor service)

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Swing check valve (liquids)installed horizontal & vertical

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Swing check valve Ops.

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Piston check valves

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check valves

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Ball check valve (for heavy fluids) installed horizontal ,vertical & angle

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Check valve (Ball)

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Pressure Relive valves

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safety valves and relief valves

Safety valves are primarily used with compressible gases and in particular for steam and air services .

Relief valves are commonly used in liquid systems

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Pressure Relief Valves

Releases excess pressure to protect system. Use with Gases & Vapors & liquid. Open Full at once at set pressure. Outlet port larger than inlet port. Never adjust whilst in service.

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Type of Pressure Relief Valve

Safety valve :Used with compressible gases .steam and air services .

Relief valve : Used in liquid systems. as pressure overspill devices .

Safety relief valve : used either for liquid or compressible fluid.

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Pressure Relieve valve (safety valve) for clean air

Releases excess pressure (clean air)

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Safety valve - liquid applications, opens in proportion to the

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Typical examples of safety valves used on steam & Air systems

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pneumatic pressure reducing

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Control system would normally consist of the following components:

Control valves. Actuators. Controllers. Sensors.

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Globe Valve.

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Valve positions

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Orifice plate

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pressure gauge