DC type low resistance backflow preventer

Features

1. Ultra-low water loss and significant energy saving: at an economic flow rate (velocity 2 m/s), the head loss is less than 4mH2O.

2. Air isolation and automatic drainage: When the main valve is closed, the drain will automatically open and the pressure in the intermediate cavity will be zero. The upstream and downstream of the main valve can achieve air isolation or zero-pressure isolation, and the isolation performance is safe and reliable.

3. Saving ground and materials, flexible installation: small appearance, light weight, structure length is only 30% of existing similar products; it can be installed horizontally or vertically.