Overview of low resistance backflow preventer:
The low resistance backflow preventer consists of an inlet non-return device, an outlet return device, a drainer and other accessories.
Low resistance backflow preventer structure
Inlet device: it is composed of a valve seat, a front check valve, a reset spring and a front valve sleeve which are arranged at the inlet;
The outlet device consists of an outlet valve seat, a rear check valve, an outlet valve sleeve and an outlet auxiliary spring. The two check valves are connected by the valve shaft, and the front and back two valves are sealed at the same time through the compensation of the auxiliary spring of the outlet;
Drainer: it consists of two front and rear induction pistons (respectively sensing the pressure of the inlet and outlet) and the valve disc linked with the two pistons and the valve seat located on the drain valve body.
Features of low resistance backflow preventer:
1. The head loss of the backflow preventer in this series is smaller.
2, when the reflux occurs, the middle cavity is always air separation.
3, the reflux occurs, the front and rear valve sealing force will automatically increase, with automatic locking effect, effectively increasing the sealing force of the back and forth valve.
4, according to force control valve principle, the export pressure is higher than the inlet pressure difference, the greater the sealing force of the disc, the lower the probability of leakage of the two discs, the better the reliability of the seal.
5, according to the installation of different ways, can increase the vacuum breaker and float switch, effectively prevent the valve outside the sewage into the valve cavity, keep the air separation.
6, shell can be used ductile iron + spray or 304 or more stainless steel materials, can be adapted to the needs of different occasions.
7. The inner parts are made of stainless steel of 304 or more, which can ensure the stability of the performance.
8 、 the backflow preventer of this series is suitable for the occasions of harmful pollution and slight pollution, and has the condition to be used in the occasions of poisonous pollution.
Zhejiang Hui Sheng Valve Co. Ltd is a professional production and sales of hydraulic control valves, multifunctional pump control valve, pressure reducing valve, control valve, micro slow close check valve, flow control valve, the intelligent control valve, hydraulic automatic valve, silent check valve, filter mud valve, piston check valve etc. a series of products, widely used in waterworks, power plants, metallurgy, petrochemical, construction, energy, medicine and other water distribution piping system. Companies always adhere to the "quality first, customer first, excellence, and strive to develop] quality policy, and dedication to provide you with the best quality service!
Address: Zhejiang Wenzhou Dong'ou Street Anfeng Industrial Zone China Global Group
Tel: 0577-66999307 66999306
Fax: 0577-66999305
Mobile: 13968957077
Http://www.zjhsfm.co