CHECK VALVE

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. They are classified as one-way directional valves. This sort of function is essential for a variety of safety applications, as well as for preventing overflow. Most common types of Check valves are swing / tilting disc, Split disc / dual plate, Wafer, lift (piston and ball) and diaphragm.

Annu Valve Products manufactures and supplies wide range of Check Valve which includes Swing, Wafer, Disc and Dual Plate type.

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WAFER CHECK VALVE

 

Product Features:

• Low cost compare to other convention check valve
• Very low face to face dimensions hence space required for mounting is less than 10% of that conventional valves
• Very low weight-total weight is only approximately 1/6 the weight of a conventional check valve
• Short wafer body enables mounting the valve with shorter length fasteners of lesser number compared to flanged swing check valve. Approximately 50% saving in cost of fasteners.
• Considerable secondary advantages resulting in substantial savings in handling, packing, transportation, installation and maintenance
• Saving in terms of overall length required for piping
• Tightening torque to be applied on the companion flange bolting is lower due to face sealing O-rings
• Practically maintenance free due to fewer number of parts and simple construction
• Can be installed in horizontal or in vertical line without any special pipe support.

Technical Specifications:

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SWING CHECK VALVE

 

Product Features:

• Bolted cover, Swing type disc
• Seating is either metal-to- metal or metal seat  to  composition  disk
• Allows for full flow area during normal operation
• Easy Installation
• Low pressure drop across the valve
• Beautiful design

Technical Specifications:

 

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DISC CHECK VALVE

 

Product Features:

• Compact and Robust Design
• Stronger, Lighter and Smaller than Conventional Swing Check Valve
• Single Disc type
• Spring Loaded Disc to Prevent Reverse Flow in Pipe Lines
• Easy To Installation between Two Pipe Flanges
• Maintenance Free
• Metal To Metal or Soft Seat option
• Full Port Opening
• Less Expensive to install

Technical Specifications:

 

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DUAL PLATE CHECK VALVE

 

Product Features:

• Smaller in size and lighter weight
• More feasible in operation
• Dual spring loaded plates / disc hinged on a central hinge pin
• Operates on the differential pressure between fluid flow pressure & spring torsion pressure
• Only Check Valve which can be installed for flow upside down due to spring assisted closure
• Efficient and Positive sealing under most flow and pressure conditions. Valve closes before flow reversal at zero velocity
• Long life and trouble -free operation

Technical Specifications: