Non-Rising Stem Resilient Seated Gate Valve DIN3352-F4 China factory
What's Non Rising Stem Gate Valve ?
Non Rising Stem Gate Valve , a design principle that is dominant in preference for use in distribution systems.
The Non Rising Stem Gate Valve contains a wedge fully encapsulated with EPDM rubber that is permanently bonded to the wedge and meets ASTM D249. The valve body, bonnet, and stuffing plate are coated with fusion bonded epoxy (FBE) ,beautiful looking and excellent protection.
Non Rising Stem Gate Valve are very popular for industrial application.
- 1)Perfect sealing:bi-directional bubble sealing.
- 2)Low cost:rubber seat is vulcanised on the wedge,no need for further machining of valve seat.
- 3)Simple structure and Easy maintenance
Main features of NORTECHNon Rising Stem Gate Valve
The body is made of ductile iron by precision casting moulding,It was designed by 3D software,with finite element analysis for the structure.The safety coefficient is over 2.5.Smooth bottom channel is designed,to avoid accumulation of impurities and to ensure small flow resistance.
The stem is made of stainless steel by rolling. Integral type,avoiding the use of the brass half rings to reduce stem diameter. the smooth modified ladder type screw is extruded. Global mirror polish,it fits the O rings well, to ensure that the smooth rotation and small torque.
The grade 8.8 bolts connect the bonnet and the body, the bolts were covered by hot-melt wax which protects the bolts for corrosion. The gasket between the bonnet and body is made of EPDM. The valve cover is machined with a retaining groove,make sure that the rubber gasket won't be extruded out under high water pressure.
Environmental friendly manufacturing
The rubber parts are made of high quality EPDM or NBR, which is in accordance with the drinking water requirements,avoiding the problem of the common rubber which is likely to breed microorganism.The products is not only approved by chinese national quality standards for drinking water related products,but also approved by WRAS in UK and ACS in France.The stem nut is forged and rolled from the national standard brass rod (low content of lead),and no pollution to water.
Easy installation and operation
We offer various kinds of interface such as flange connection,PVC pipe socket, uctile iron pipe socket,reducing etc.The special connection design can be customised as per the requests of users.
The valve can be completely closed and reach at o leakage with small torque. The actual operating torque is only 80% of diameter, and the gate valves can bear the MST of 3*DN N.M. The products passed the life test of 5000 times. For the valves of large diameter, we can offer the labour saving devices, to ensure that all the valves can be opened and closed by one person. The handwheel is strong, with accurate dimensions, it fits well with the valve stem, the shape is in accordance with human mechanics, to ensure easy operation
Specifications of NORTECH Non Rising Stem Gate Valve
DIN3352 F4/F5,EN1074-2,BS5163 Type A,AWWA C509
| Design and Manufacture | DIN3352 F4/F5,EN1074-2/BS5163/AWWA C509 |
| Face to face | DIN3202/EN558-1/BS5163/ANSI B16.10 |
| Pressure rating | PN6-10-16,Class125-150 |
| Size | DN50-600 OS&Y Rising stem |
| DN50-DN1200 Non-rising stem | |
| Rubber wedge | EPDM/NBR |
| Appilcation | Water works/Drinking water/sewage etc |
Product Show: Non Rising Stem Gate Valve
Application of NORTECH Non Rising Stem Gate Valve
Non Rising Stem Gate Valve are widely used in the field urban water system,supply and drainage of water,water treatment,sewage,irrigation,potalble water,pharmacery plant.
