Non-rising stem gate valve is one type of gate valve with flexible wedge as its on-off disc, which moving direction is perpendicular with flow. Non-Rising Stem means outside stem, also referred to as the rotary stem gate valve or blind stem wedge gate valve. In an NRS valve, the stem will turn to open and close the gate, but the stem does not move up or down as it turns. Gate valve can be only full open or full close. They are widely used in series of industries, especially in water supply projects, public works, water treatment plant, fire fighting, etc. Prosper Flow can manufacture resilient seated gate valve according to the standard of DIN3202 F4/F5/BS5163 with sizes of 2″~32″ (DN50~800mm).

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1. FEATURES

· Full bore design

· Self cleaning & low pressure loss

· Rolled stem ensure smooth thread edges and double thread

· Low operating torque

· Good and clear body marking (Castings are from the same foundry with AVK Valve and Spain TALIS)

· Online replaceable under full pressure with valve fully opened; Three o-rings protects upper stem from impurities entering from the water way

· Every valve be 100% tested and qualified before packing and delivery

2. STANDARD

· Design & manufacturing: EN1171/1074/DIN3202-F4/ F5/BS5163

· Face to face: EN558-1 series 3,14,15

· Flanged ends: ISO7005-2, EN1092-2, DIN2501 PN10/PN16

· Inspection & testing: EN12266-1

Gate valve manufacturers:Anhui Prosper Flow Technology Co.,Ltd.

3. TECHNICAL SPECIFICATION

· Working pressure: PN10 / PN16 Bar

· Size: 2″~32″ (DN50~800mm)

· Materials: cast iron, ductile iron

· Epoxy resin thickness: ≥250micron

· Applicable temperature: 0℃~+80℃

· Available with handwheel/square cap/gearbox/ electric actuator

4. Non-rising stem gate valve’s application

· Water supply system

· Waste water, sludge, sewage treatment industry

· Irrigation system

· Real estate industry

· Mining, steel industry

· Metallurgy plant, power plant

· Textile, pharmaceutical industry

· Food, pharmaceutical industry

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