Types of Valve

 Check Valve: 

• Also called non-returns valves.
• Automatically prevents reversal of flow.
• Fitted to release air automatically when a pipeline is being filled.
• Also called Reflux valve.

Sluice Valve:

• Used to regulate the flow of water through pipes.
• Used for isolating or scouring.
• It will seal well under high pressures.

Scour Valve:

• Provided to stop the flow of water to remove silt manually
• Also used to release water to eject the silt that might have got collected in the pipe.
• Also called Blow off valve or Drain valve.

Relief Valve or Safety Valve:

• Also known as pressure relief valve or cut-off valve
• This valve is used when the pressure of the water suddenly exceeds the permissible pressure due to water hammer phenomenon, then the valve is opened automatically and the excess pressure is released instantaneously and it will save the pipe line from bursting.