VALVES TYPE & FUNCTION VALVES

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

ON – OFF SERVICE

Gate valve.

And Other Fluid Services. Gate Valve :- ON – Off Valve ,Used in: 1-Water. 2- Oil. 3- Gas 4- Steam And Other Fluid Services.

Wedge gate valve and parallel slide valve

Gate valve 2.

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

Plug valve (on-off) or Cock

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

Ball Valve (on-off)

Ball Valve Quarter-Turn Hydraulic systems . Water . Air. Oil . Petrochemical . High volume, high pressure and high temperature flow .

THROTTLING (Regulating) SERICE

Globe Valve (High pressure & value )

Globe Valve.

Globe Valve Ops.

Needle Valve Fine accurate flow Cont.

Butterfly Valve Flow Control Low Speed Both Side flow

Butterfly Valve 2

Prevention of back flow

split disc check

Split disc check valve operation

lift check valve (Recommended for Vapor service)

Swing check valve (liquids) installed horizontal & vertical

Swing check valve Ops.

Piston check valves

check valves

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

Check valve (Ball)

Pressure Relive valves

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

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.

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.

Pressure Relieve valve (safety valve) for clean air Releases excess pressure (clean air)

Safety valve - liquid applications, opens in proportion to the

Typical examples of safety valves used on steam & Air systems

pneumatic pressure reducing

Control system would normally consist of the following components: Control valves. Actuators. Controllers. Sensors.

Globe Valve.

Valve positions

Orifice plate

pressure gauge