— Non-return valves manufactured and tested acc. to EN 1074-3 (water supply valves)
— Flanges acc. to EN 1092-2 PN 10/16
— Resilient seated acc. to EN 16767
— Installation length acc. to EN 558-1, series 48
— Final strength and tightness test acc. to EN 12266-1
— Corrosion protection acc. to DIN 30677-2 and EN 14901
— Sealing elements for drinking water acc. to EN 681
— Microbiological suitability acc. to EN 16421 (W270)
Art. 435 NORVA
DN 40–500
- Double lifetime due to turnable disc
- Complete closing even at small pressure
- Small pressure losses
- DN 350-500 as standard with bypass
- Horizontal and vertical installation possible
- Easy maintenance – no removal from the pipeline
— UBA, W270, ACS WRAS, Belgaqua for EPDM sealing elements and Epoxy coating
— GSK – RAL-GZ 662/2 for corrosion protection
— EAC for the Russian market
— EMI for the Hungarian market
— VIK for the Croatian market
— Conformity for potable water acc. to DM 174 for the Italian market
POSSIBLE ADDITIONS
— Lifting device 3⁄4″
— Manometer connections — PN 6 flanges
— Set 1: EPDM/NBR rubberised disk, O-ring for bonnet
— Set 2: EPDM/NBR O-ring for bonnet, gasket for plug screw
— Protection against water hammer