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JD check valves are ideally suitable for vertical and horizontal application. A range of Check Valves (Non-Return Valves) suitable for oil, gas, water, refining, power and chemical applications where the prevention of flow reversal is mandatory.
DESIGN – JD Check Valves are Bolted cover design up to 600# and above pressure seal design. It is designed for long service life and maintenance free operation. It has a full-flow area body and is equipped with a disc arm with dual precision pins for optimum disc connection and protection against damage due to vibration.
OPERATING PRINCIPLE- A swing check valve consists of a flap or disc of the same diameter as the pipe bore, which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to hinge upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve; however, in some cases, closure may be assisted by the use of a weighted lever.
Availability [Size] : DN25 / 25MM / 1" To DN300 / 300MM / 12"
|Swing Check Valve / Lift Check Valve / Single - Dual Plate Wafer Type Check Valve [NRV]|
|Availability [Size]||:||DN25 / 25MM / 1" To DN300 /300MM / 12"|
|Body & Bonnet||:||WCB [CS] / CF8 [SS 304] / CF8M [SS 316] / CF3M [SS 316L]|
|Seat & Disc||:||CS + 13% Cr. / CA 15 / AISI 410 / AISI 304 / 316 / 304L / 316L|
|Gasket||:||P.T.F.E. / Graphite Asbestos / SPW SS With Graphite Filled|
|Fasteners||:||CS / B7 / 2H / SS 304 / SS 316|
|Flange Drilling||:||ANSI 16.5 / BS 10 Table/ DIN / IS STD.|
|End Connection||:||Flanged End, As Per ANSI B 16.5|
|Pressure Rating||:||ASA 125# / 150# / 300# / 600# / 800# / PN6 / PN10 / PN16|
|Valve Design||:||BS 1868 / DIN STD. [Swing & Lift Check Valve] // API 6D [Wafer type Check Valve]|
|Pressure Testing||:||BS 6755 Part I / DIN STD. [Swing & Lift Check Valve] // API 598 [Wafer type Check Valve]|
|Face to Face||:||ANSI B 16.10 / API 6D|