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TYPE NZ & NA

NK valve
NB slice
  • Fully balanced ring disk
  • Single spring
  • Specifically for gas applications
  • Worldwide patented design
  • Low pressure loss
  • Maintenance free
  • Easy adjustable on site
  • 12" - 88" (DN 300 - DN 2200)
  • Up to PN 400 (ANSI 2500)

NZ is designed for the gas applications with very low flowrates; it combines the advantages of minimized friction due to zero bending moments on the disc, stable operation at partial open flow and best dynamic behavior due to shortest disc stroke of any axial check valve. Type NA is in accordance with API face-to-face dimensions.

COMBINING THE BEST OF TWO WORLDS (Single Spring & Ring Disk) SPECIFICALLY FOR GAS SERVICE

DenominationCarbon Steel Stainless Steel
Valve Body ASTM A 216 WCB ASTM A 351 CF8M
Seat AISI 316 ASTM A 351 CF8M
Valve Disc ASTM A 351 CF8M ASTM A 351 CF8M
Guide / Spacer AISI 316 AISI 316
Spring AISI 316 AISI 316
Flow Diffuser ASTM A 216 WCB ASTM A 351 CF8M
Central Tie Bolt ASTM A 193 B8M ASTM A 193 B8M

Materials according to customers request, such as Low Temperature Carbon Steel, Nickel-Aluminium-Bronze, Duplex, Superduplex, 6Mo, etc.