Series ND

Series ND

The unique ring disc design ensures that the disc remains light and responsive even in large sizes, which is essential for rapid non-slam closure. Mounted on a multiple spring and radial guide assembly, the disc moves freely without the frictional forces. Combining two ring-shaped annular flow paths with the excellent pressure recovery properties provided by the diffuser, the minimal pressure drop across the Type N valves gives lifetime energy savings when compared to more conventional check valve designs.

Brand: Noreva
Category: Axial Check Valves
Valve Size 12" to 88"
Pressure Class Standard ASME B16.34, API 6A
Pressure Class Range Class 150, 300, 600, 900, 1500, 2500, 4500; API 2000, 3000, 5000, 10000, 15000, 20000
Body One-Piece Body
End Connections Flanged, Hub-End, Butt-Weld, Socket-Weld
Face-to-Face Standard API 6D
Disc Type Ring
Guiding Radial
Seating Metal-to-Metal
Flow Axial
Type Non-Slam Anti-Surge
Media Application Liquids, Gases
Shut-Off Classification API 598, ISO 5208 Rate E

The streamlined internals of the axial check valve range allow for a turbulence free flow path through and around the disc

The high capacity, smooth flow path results in low pressure drop across all of the axial type valves

Noreva axial check valve designs use no soft parts and are therefore inherently fire-safe

There are no wearing parts, for clean services, making it maintenance free

The springs are sized according to the flow rates to ensure that the valves are in the fully open position during normal use

The axial design ensures that the disc remains light and responsive even in large sizes

Mounted on a multiple helical spring and radial guide assembly, the disc moves freely without any frictional forces

With a flow path both around and through the centre of the disc the flow capacity of the valve is best in class

Low weight discs, short stroke lengths and spring assistance combine to ensure that it responds quickest to change in flow direction

The fast response ensures reverse velocity cannot build up to a level that can damage pumps, pipes or related equipment

Pressure surges can occur when a valve is closed against a moving body of fluid, the quick closure results in a considerably lower pressure peak

Certifications Canadian Registration Number (CRN)
ANSI NSF 61 – Drinking Water System Components – Health Effects
PED 2014/68/EU CE Mark
Design Standards ASME B16.47 – Large Diameter Steel Flanges
ASME B16.5 – Pipe Flanges & Flanged Fittings
ASME B16.9 – Factory-Made Wrought Buttwelding Fittings
ASME B16.10 – Face to Face & End Dimenions of Valves
ASME B16.11 – Forged Fittings, Socket-Welding & Threaded
ASME B16.25 – Buttwelding Ends
ASME B16.34 – Valve Flanged, Threaded, and Welding End
ASME SA Materials
ASTM A Materials
Quality IS0 9001:2015

No manuals available at this time.