Product series
Low resistance backflow preventer
Category:
- Product details
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PRODUCT HIGHLIGHTS
The low-resistance backflow preventer is a hydraulic control combination device developed by our company that is mainly used for water supply units such as urban water supply to strictly limit the pressure water in the pipeline to flow only in one direction. Its function is to occur in the water supply system. During siphon reflow and back pressure reflow, it can effectively prevent the medium with poor water quality at the outlet from flowing back to the inlet with better water quality, avoiding water pollution from domestic water, and ensure the safety of domestic water to achieve the purpose of avoiding backflow pollution
PRODUCT PARAMETERS
Part Name Material Valve body Ductile Iron/Stainless Steel Spool Stainless steel Stem Stainless steel Drainage Stainless steel Model DN L H D K n-φd PN10 PN16 PN10 PN16 PN10 PN16 BV418-10/16 50 230 250 165 165 125 125 4-φ19 4-φ19 BV418-10/16 65 236 286 185 185 145 145 4-φ19 4-φ19 BV418-10/16 80 276 300 200 200 160 160 8-φ19 8-φ19 BV418-10/16 100 298 247 220 220 180 180 8-φ19 8-φ19 BV418-10/16 125 303 365 250 250 210 210 8-φ19 8-φ19 BV418-10/16 150 364 404 285 285 240 240 8-φ23 8-φ23 BV418-10/16 200 470 520 340 340 295 295 8-φ23 8-φ23 BV418-10/16 250 470 520 395 405 350 355 12-φ23 12-φ28 BV418-10/16 300 580 680 445 460 400 410 12-φ23 12-φ28 BV418-10/16 400 740 900 565 580 515 525 16-φ28 16-φ32 BV418-10/16 500 900 1100 670 715 620 650 20-φ28 20-φ32 APPLICATIONS
Installation Precautions
◆ Before formal installation, all pipes should be thoroughly flushed.
◆ Backflow preventer should be installed as horizontally as possible to facilitate debugging and maintenance.
◆ Maintenance gate valves should be installed at both ends of the backflow preventer, and filters should be installed before the inlet, and a flexible joint should be installed.
The drainage of the drain valve should be discharged to a drainage ditch on the ground, and the distance between the lower end of the drain valve and the ground should not be less than 300mm.
◆ The principle is bad. It is allowed to install the backflow preventer in the pit. If it is really necessary, it must comply with the corresponding local regulations; it is required to be installed in a suitable and isolated space by an approved technician; and to avoid flooding caused by the release of water.
◆ When the backflow preventer requires maintenance without water, two backflow preventers should be connected in parallel on the main pipeline.