Vacuum Wafer Type Non Return Valve

Listing ID #3222142

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Details :

• Spring closing arrangement for the prevention of reverse flow in pipelines.
• These valves are general-purpose valves that are stronger, lighter and smaller than conventional swing check valves and   therefore, less expensive to install and maintain.
• Suitable for higher pressure/temperature (up to 400*C)
• Compact Design for simple installation between wide ranges of flange types.
• It can be mounted in any plane/direction.
• Extremely low opening pressures.
• Available sizes 15mm to 100mm, suitable for PN6-PN40 and ANSI 150/300.
• Weight and Dimension are same for class 150 & class 300 valves.
• Valves are self-centering type.
• Zero leakage for soft seated valves.
• The maximum permissible leakage rate shall be 3 cubic centimeters per inch of nominal pipe size for metal-seated valves.
• Testing - As per API 598
• Design - As per manufacturers standard.
  

Material of Construction :

• Body : AISI 316, WCB.
• Disc :   AISI 316
• Spring : Standard AISI 316 Spring Nimonic - for high temperature up to 400c
• Disc Seat - Standard, EPDM/Nitrile, Soft seated-for water-silicon/viton soft disc seating face - for oil & gases.

General Construction :

• Metal to Metal seated Construction
• Soft seated (EPDM/Nitrile/ Silicon/viton) construction    

PRESURE RATING : PN 40

Flange Standard :

• BS 10 Table D, E *& H
• DIN: PN6, 10 16, 25, 40
• ANSI 150 and 300

Operation : Non Slam Check Valves are opened by the pressure of the fluid and closed by the spring as soon as flow ceases and before reverse flow occurs.

Installation : Non Slam check valves simply fit between two pipe flanges  Standard gaskets are used on either side of the valve together with longer bolts or studs.