Low resistance backflow preventer product performance and the scope of application is based on the principle of hydraulic control, has a compact structure, reliable isolation, small head loss, small size, light weight, easy installation and maintenance and so on. Mainly used in water supply system, water system and municipal pipeline system, can prevent and isolate unclean water backflow pollution of drinking water.

Low resistance backflow preventer installation precautions, low resistance backflow preventer shall be installed on both sides of the butterfly valve or gate valve, the inlet side shall be installed with stainless steel filter (mesh diameter ≤ 2mm) filter, the outlet side is suitable for the installation of expansion or soft joints of these products; the need for non-stop maintenance, can be set up in parallel with the installation of a standby, the drain outlet need to be installed in addition to the drainage pipe, led down to the top of the collection of water outlet The drain outlet of the drain needs to install a separate lead pipe and lead it downward to the top of the water collecting outlet ≥150mm, and no valve is allowed in the middle.

Backflow preventer needs to be tested regularly, should be avoided to set up in the outdoor shade well, assortment set up in the room, and have enough space location to facilitate maintenance and overhaul. Cold areas should have warmth and anti-freezing measures, can be installed horizontally or vertically, the direction of the arrow on the valve body should be consistent with the direction of flow of the medium in the pipeline, and its detection of the ball valve port external to facilitate the detection of the large caliber backflow preventer should be supported by brackets to support the backflow preventer valve group, the installation of the pipeline should be flushed before flushing the pipe clean the pipeline particles in the impurities.