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Straight-flow Low Resistance Backflow Peventer
Product overview
Straight-flow low resistance backflow peventer is mainly used for the effective separation between the urban water supply network and various kinds of user pipe network, or the cross connection between drinking water and medium water, fire water, air conditioning water, green water and other heterogeneous water systems, or the supporting installation without negative pressure equipment, which can strictly prevent the occurrence of backflow pollution.
Product Features
1. Ultra low water loss and remarkable energy saving: the head loss is less than 4mh20 at the economic flow rate (flow rate of 2m / s).
2. Air partition and automatic drainage: when the main valve is closed, the drainer will open automatically and the pressure relief in the middle chamber will be zero. The upstream and downstream of the main valve will realize air isolation or zero pressure isolation, and the isolation performance is safe and reliable.
3. Saving land and materials, flexible installation: small shape, light weight, structure length is only 30% of the existing similar products; it can be installed horizontally or vertically.
Execution Standard
Performance Parameter
Nominal diameter：DN50~300mm
Nominal Pressure：PN1.0～1.6MPa
Dynamic head loss：≤0.03 MPa
Partition form：Air partition or zero pressure partition
Body material：Nodular cast iron
Interior material：304 Stainless steel
Applicable temperature：≤65℃
