BNSV Backflow preventer
Overview
Backflow preventer is a kind of hydraulic control combination device, which strictly limits the one-way flow of water in the pipeline according to the situation that the backflow pollution of tap water supply equipment, especially the domestic drinking water pipeline, is serious, and there is no effective device to prevent the backflow pollution. Its function is to prevent the medium backflow in the pipeline under any working conditions, so as to avoid the backflow pollution.
● Small size and compact structure;
● The unique flow channel design of the two-stage check valve can open and close quickly, which can effectively prevent the sudden rise of pressure from damaging the pipeline of the valve, and has the function of mute;
● The discharge pressure of the drain valve is adjustable, with little interference from pipeline fluctuation, and the opening and closing is safe and reliable;
● The structure of air partition with double inlet and outlet channels makes the air intake and drainage in the partition chamber not affect each other, and the problem of drainage failure and poor drainage will not occur, which can completely limit the possibility of pressure water backflow or siphon backflow.
● Online test and online maintenance are available.
No. | Parts | Material |
1 | Body | Cast iron、Ductile iron 、WCB |
2 | Bonnet | Cast iron、Ductile iron 、WCB |
3 | Disc | Ductile iron |
4 | Spring | Stainless steel、chrome vanadium steel. |
5 | Antifouling valve | Brass |
