Скачать или смотреть Block Valve : Gate Valve parts and their working animation

Valves :

Valves function:
Valves Control the flow of fluids through pipes by:
Starting and stopping flow - to control process or isolate part of a pipeline.
Changing the flow rate - allowing more or less fluid to flow.
Re-directing flow from one line to another at a pipe.
Basic Valve components :
1. Valve body (2) Valve bonnet (3) Valve trim (4) Valve packing (5) The actuator (6)

Valve classes :
Valves can be divided into four classes
Block valves _ stop and start flow
Throttle valves _ control flow rate
Non return ( or check ) valves_ prevent flow reversal .
Pressure control valves _ prevent fluid pressure exceeding a set maximum.
Block Valves :
Block Valves have four types.
1. Gate valves (2) slide valve (3) ball valves (4) plug valves

1- Gate valves:
They are used to start and stop a flow completely. They should not be used to control flow rate. Using a gate valve in a partially open position can damage the valve. Fluid flow across the gate causes erosion to the gate making it impossible to seal well against it's seat.
Valves Abbreviations and terminology :
FC : fail closed
FL : fail locked
FO : fail open
MOV: motor operated Valve
PRV: pressure Relief valve
PSV: pressure safety valve
SOV: solenoid operated Valve.


Valve type , Gate , use in oil Refinery .