Pipe Appurtenances Valve and Joint in Water supply Piping

Pipe Appurtenances - Valve 

Check Valve: 

• These valves are used to check the flow of water in reverse direction. 
• These are generally provided on the delivery side of the pump. These valves work automatically.

Pressure reducing valve:  

• In hydraulics, a pressure reducing valve serves the same purpose as a "pressure regulator" valve in a compressed air system. 
• It is one of a variety of pressure control valves available for hydraulic circuits. It is always used in a branch circuit and never in the full pump flow line.

Air Relief Valve: 

• it is a type of safety valve used to control or limit the pressure in a system, pressure might otherwise build up and create a process upset, instrument or equipment failure, or fire. 
• The pressure is relieved by allowing the pressurised fluid to flow from an auxiliary passage out of the system.

Air Valve: 

• Provided at summits to release air pressure.

Relief Valve or Safety valve or cut-off Valve:

• Helps in regulating the water hammer pressure.

Scour valve: 

• This valve is used to drain the water out of the pipe system.

Sluice valve: 

• These valves are used to regulate the flow of water in the pipe system by dividing into number of sections.

Foot Valve: 

• Prevent entry of debris into the pumping system and prevent back flow.

Butterfly valve:

• Regulate and Stop the flow specially in large size conduits.

Globe Valve: 

• Direction of Flow changes by 90° twice

Surge arrestor: 

• Control of water hammer in pipe lines by absorbing surge energy.

Joint in Water Supply Piping:

Flexible joint: 

• Where Settlement of pipe line can occur.

Threaded joint:

• Recommended for connecting the GI pipes.

Simplex joint: 

• For joining asbestos cement pipes.

Flanged joint: 

• Recommended for temporary work where the pipe line is to be dismantled after work or to be shifted.

Expansion joint: 

• Provided at suitable intervals to take into account the change in pipe length due to temperature variations.

Collar joint: 

• Recommended for joining R.C.C pipes and asbestos cement pipes.

Spigot and socket joint: 

• Also known as Bell-spigot joint. Where spigot end is inserted into the bell end.

Joint in water supply Piping.jpg

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