China Cast Iron Check Valves, Avoid Fluid Backflow, Bronze Check Valve, Copper Valve, Find details about China Cast Iron Check Valves, Check Valve from Cast Iron Check Valves, Avoid Fluid Backflow, Bronze Check Valve, Copper Valve
check valve(back pressure valve, swing valve, one-way valve): a valve that closes by fluid pressure to prevent return flow (Also called nonreturn valve),A check valve is a mechanical valve that only permits water flow in one direction. There must install check valve where don't allow fluid flow back such as compressor or pump outlet. | |||||||
For low pressure medium and nominal diameter <DN50mm, select Butterfly swing check valve, vertical lift check valve or diaphragm check valve. If 1200mm>DN>200mm, select butterfly check valve or diaphragm. If require pipe small water hammer or no water hammer, better select slow-close type swing check valve and low-close butterfly check valve. | |||||||
Types | Max. DN | Max. PN | Temperature | Installation | Features and Application | sealing | resistance |
Vertical lift check valve | 50 | 6.4 | -29~550ºC | Horizontal pipe | Water, steam, oil | good | high |
Horizontal lift check valve | 50 | 6.4 | -29~551ºC | Horizontal / vertical pipe | Water, steam, oil | good | high |
Foot Valve bottom valve | vertical pipe | Vertical pipe at Pump inlet and fluid flow from bottom to top. | |||||
Swing Check Valves | >2000mm | 42MPa | -196~800 ºC | Any direction (Horizontal, vertical, slant^) | Water, Seam, air, corrosive fluid, oil, food, medicines ect. Any fluid. | worse | low |
Butterfly Swing Check Valve | >2000mm | 6.4MPa | -196~540ºC | Any difection (Horizontal, vertical, slant^) | low pressure big piping, suitable low speed flow medium | worse | low |
Diaphragm check valve | >2000mm | 1.6MPa | -20~120ºC | tap water pipeline | Can relieve water hammer. | ||
Ball check valve | 200~1200mm | 42MPa | -196~540ºC | Horizontal / vertical pipe | Water, steam, oil, Nitric acid, urea and strong oxidizing medium,can relieve water hammer. full tube access. | good | low |