Low Resistance Backflow Preventer

Product Structure Features

· The structure is more compact, short in size, small in volume, low in water loss, low in noise. The normal working water loss is 1.3-2.5 meters at the economic flow rate.

· The precision and water discharge pressure of the drain valve are adjustable, so that it is less disturbed by pipeline pressure fluctuations, opening and closing are safe and reliable, and there is no abnormal drainage phenomenon.

· The single diaphragm design and the proven reliability of key components such as the diaphragm make its quality better than ordinary low-resistance backflow preventers.

· The unique flow channel design of the two-stage check valve has small flow resistance and fast opening and closing speed, which effectively prevents the damage of the valve and pipeline caused by the sudden increase of back pressure, limits the backflow of pressure water or siphon backflow, has a silent function, and effectively prolongs the service life of the valve.

· Humanized design, the product can be installed horizontally or vertically, online testing, online maintenance,

· The surface of the valve is coated with cyclohydrogen resin powder before assembly 

Low resistance backflow preventer is mainly used for water supply units such as urban water supply to strictly limit the pressure water in the pipeline to flow in one direction. It is a hydraulic control combination device. 

Its function is to effectively prevent the medium with poor water quality at the outlet from flowing back to the inlet with better water quality when siphon backflow and back pressure backflow occur in the water supply system, 

avoiding water quality pollution of domestic water, ensuring the safety of domestic water, so as to achieve the purpose of avoiding backflow pollution. 

Scope of application: It is mainly used for effective separation between municipal water supply network and user network, or between domestic water and different water quality systems such as fire water, 

air conditioning water, and greening water; its main function is to prevent the medium with poor water quality at the outlet from leaking to the inlet with better water quality when there are various possible internal leakages after the valve is closed,

avoiding backflow pollution. It should be equipped with internal leakage sensing and sewage drainage devices. It can also be used for the source of harmful pollution branch pipes and continuous pressure flow, but it cannot be used for backflow prevention of toxic pollution.