Product Description

DESCRIPTION
What is a non-rising stem gate valve?
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 DIN***2 F4/F5/BS***3 with sizes of 2″~*2″ (DN*0~**0mm).
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 **0% tested and qualified before packing and delivery
2. STANDARD
· Design & manufacturing: EN***1/***4/DIN****-F4/ F5/BS***3
· Face to face: EN****1 series 3,*4,*5
· Flanged ends: ISO*****2, EN*****2, DIN***1 PN*0/PN*6
· Inspection & testing: EN******1
3. TECHNICAL SPECIFICATION
· Working pressure: PN*0 / PN*6 Bar
· Size: 2″~*2″ (DN*0~**0mm)
· Materials: cast iron, ductile iron
· Epoxy resin thickness: ≥**0micron
· Applicable temperature: 0℃~**0℃
· Available with handwheel/square cap/gearbox/ electric actuator
4. Non-rising stem gate valves 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