The basic knowledge of the backflow preventer

A brief description of the backflow preventer

Backflow prevention device According to China's current water supply pipe network, especially the drinking water pipeline refluxing serious pollution, and no effective way to prevent the return of pollution devices, the development of a strict limit of water in the pipeline can only one-way flow of new water Control device.

Second, the characteristics of back to prevent the device

1, according to CJ / T160-2002 standard design;

2, the product design unique, beautiful appearance, easy installation, easy maintenance;

3, both inside and outside the surface spray environmental protection coating to ensure that the product of anti-corrosion and security;

4, accurate calculation, processing sophisticated, reliable performance, action sensitive;

5, double stop plus air partition, completely prevent any conditions under the backflow pollution.

Third, the installation of reverse flow prevention device

1, before the formal installation, should thoroughly rinse all the pipes;

2, back flow prevention device should be installed in the horizontal position, this position should be easy to debug and maintenance, and can be found in time to prevent the release of water or failure, after installation back to prevent the valve body should not withstand the weight of the pipe, and pay attention to avoid Frozen and man-made damage;

3, back flow prevention device should be installed at both ends of the maintenance gate valve, should be installed before the installation of filters, and at least one end should be equipped with flexible joints. However, for pipelines used only in emergency situations, consideration should be given to the possibility that the mesh of the filter is interrupted by impurity and cause water interruption in emergency situations;

4, the drain valve outlet should not be directly connected with the drainage pipe, but should be discharged through the leaking bucket to the ground drains, leakage bucket bottom surface and the ground distance should not be less than 300mm.

Fourth, the scope of the use of anti-stop device

1, the construction of various types of drinking water pipe network and production that does not allow the media back in the pipeline;

2, municipal water access users close to the user water meter outlet;

3, living drinking water pipes and access to the intersection of non-living drinking water pipes;

4, water submerged water pipe outlet when the pipeline;

5, in series with a pressurized pump or a variety of pressurized equipment on the drinking water pipeline on the suction pipe.