WALTER NRGV Model Non-rising Stem Resilient Seated Gate Valve is a soft seal disc which is fully encapsulated with rubber. The valve is designed with new technology for light operating, no clogging and no corrosion, good resilient memory & long service life. It can be used extensively in all kinds of water supply & sewage, fire-fighting and function as a shut-off or regulating valve. Technical Data Size range DN50-DN1200 Pressure range PN10-16-25 Temperature -10°ºC to +80ºC Design EN 1171/ EN 1074 Face to face DIN 3202 F4/F5, BS5163, Flange drilling EN 1092-2 / ISO 7005-2 Coating Thermoplastic Powder Epoxy Testing EN 12266-1 Marking EN 19 Coating Blue Color RAL 5005 RAL 5010 RAL 5015 Custom made Application Range • Potable water • Waste water • Water treatment and distribution systems • Food and chemical enterprises • HVAC • Power plants Operation Versions • Hand wheel • Bare shaft • Operation cap • ISO top flange • Gearbox and hand wheel • Gearbox and top flange • Electrical and Pneumatic • Body & Cover are made of high grade Ductile Iron. • Disc is designed with an abrasion resistant nylon guide which can help less opening or closing torque and smooth during operation. • Forged stem provide stronger stem operation and less moving parts. • Disc is covered by high-grade rubber which complies with drinking water. • High-tech rubber curing with precise geometry dimensions, more resilient & strong adhesive to ductile casting. • The 3 O-ring stem seals are designed to prevent stem leakage. and provide replacement of the O-ring without disassembling of valve from mainline pipes. • Both inside & outside are coated with epoxy resin powder. • Hydro-static test pressure for seat: PN x 1.1 , for shell: PN x 1.5 according to EN 12266-1.