Material: Cast Iron or Ductile Iron
Check valves are "automatic" valves that open with forward flow and close with reverse flow The pressure of the fluid passing through a system opens the valve, while any reversal of flow will close the valve Exact operation will vary depending on the type of check valve mechanism Most common types of check valves are swing, lift (piston and ball), butterfly, stop and tilting-disk
|Main Parts Material|
|1||Body||Cast Iron or Ductile Iron|
|2||Bonnet||Cast Iron or Ductile Iron|
|3||Seat Ring||Bronze/Stainless Steel|
|4||Disc||Cast Iron or Ductile Iron|
|5||Bolt||Cast Iron or Ductile Iron|
|8||Drain Plug||Stainless Steel|
Body Test:1.5 times the working pressure with water. This test is performed after valve assembly and with disc in half position open, it is called as a body hydro test.
Seat Test:1.1 times the working pressure with water.
Function/Operation Test:At the time of final inspection,each valve and its actuator (Flow-Control Lever/ Gear/Pneumatic Actuator),under goes a complete operating test (Open/Close).This test carried out without pressure and at ambient temperature.It ensures the correct operation of the valve/actuator assembly with accessories such as solenoid valve,limit switches,air filter regulator etc.
Special Test:On request,any other test can be carried out according to special instruction by client.
1.Water Treatment Plant
4. Heating & Air Conditioning
10.Waste Effluent Treatment Plant
11.Cooling Water Circulation
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