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Nominal pressurePN16-PN25
Test shell strength2.4MPa~3.75MPa
Liquid high pressure seal1.76MPa~2.75MPa
Gas low pressure seal0.6MPa~0.6MPa
Temperature-29~260℃
MediumWater, steam, oil, etc
Product overview
Pressure reducing backflow preventer is a hydraulic control combination device developed by our company, which is mainly used for urban water supply and other water supply units to strictly limit that the pressure water in the pipeline can only flow in one direction. Its function is to effectively prevent the medium with poor water quality at the outlet from flowing back to the inlet with good water quality when siphon backflow and back pressure backflow occur in the water supply system, It avoids the water pollution of domestic water and ensures the safety of domestic water, so as to avoid backflow pollution. At the same time, it plays a certain decompression function and effectively protects the safety of the outlet pipe network.
Repair and maintenance
The backflow preventer has long maintenance cycle, reliable operation and automatic control, without frequent and fine maintenance. When it is found that there are periodic or continuous leakage and other faults under the condition of no leakage, it is necessary to check and repair. Special tools are not required during maintenance, but they shall be completed by approved technical workers, and attention shall be paid to avoid confusion of parts of inlet check valve, outlet check valve and drain valve.
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