Resilient Seated gate valve
What's resilient seated gate valve(RSGV)?
Resilient Seated gate valve(RSGV), a design principle that is dominant in preference for use in distribution systems.
The resilient seated 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. Optional configurations also include a Non-Rising Stem (NRS) or Outside Screw & Yoke (OS&Y). Resilient seated gate valve also can be operated with a Spur or Bevel Gear,and electric actuator.
the resilient seated gate valves 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 NORTECH resilient seated gate valve(RSGV)?
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 frame of the wedge is made of ductile iron by the precoated sand moulding,the wedge is covered by EPDM totally.Double seal design,each seal line can work independently
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 inside and outside surface of the valve is coated with sanitary epoxy powder by fusion bonded epoxy(FBE), the average thickness is above 250um. The adhesion of the coating is strong,it won't be destroyed under the impact force test of 3J. Internal parts can meet with the environmental protection requirements,and can be used for the potable water,food and pharmaceutical area directly.The electrostatic powder coating process can promise high adhesion force and strong corrosion resistance
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 gate valves can be operated by electric actuator,handwheels,wrench cap or special key. It's convenient to install the valves in different positions of the pipe lines. besides the vertical installation,the valves also can be horizontally installed. In some narrow spaces, you can choose the installation way which is convenient for the operation of the valves.
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
Easy maintenance
The seal ring can be replaced without cutting off the water,it's easier for the maintenance and reduce the maintenance time as much as possible.Very small friction between the brass bushing and the "O" type seal,it will ensure long life of the seal ring.The max. operating torque is under the control.
Specifications of NORTECH resilient seated gate valve(RSGV)?
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 |
BS5163 Type B
| Design and Manufacture | BS5163 Type B |
| Face to face | BS5163 |
| Pressure rating | PN10-16 |
| Size | DN50-300 Non-rising stem |
| Rubber wedge | EPDM/NBR |
| Appilcation | Water works/Drinking water/sewage etc |
Product Show:
Application of NORTECH resilient seated gate valves
Resilient Seated gate valves are widely used in the field urban water system,supply and drainage of water,water treatment,sewage,irrigation,potalble water,pharmacery plant.
