Backflow preventer

Technical Parameter

Product model: HS41X (A)

Nominal diameter: DN50~DN600

Nominal pressure: PN10/16

Operating temperature: 0°C~85°C

Applicable medium: water

Manufacturing standard: GB/T25178

Body material: cast iron, ductile iron, cast steel, stainless steel


Product Detail

Product Description

The backflow preventer is a safety device composed of a drainer between two check valves, which is used to prevent backflow pollution of drinking water pipes. Ensure the hygiene and safety of drinking water.


Product Features

1. The double check valve is designed as a whole, with small structure size, light weight and convenient installation and maintenance.

2. The valve body adopts the streamline type, the resistance loss is small, and the energy is saved.

3. The combination of double check valve and safety drain valve can completely prevent backflow pollution under any working conditions.

4. All moving parts are made of stainless and wear-resistant materials with long service life.


Material Of Main Parts

NOPart nameMaterial
1BodyCast iron, ductile iron, cast steel, stainless steel
2CapCast iron, ductile iron, cast steel, stainless steel
3DiscDuctile Iron
4SpringStainless steel, chrome vanadium steel
5Anti-fouling valveBrass





倒流防止器(图1)


Main External Connection Dimensions

DN

50

65

80

100

125

150

200

250

300

350

400

450

500

600

L

458

482

551

653

735

793

1008

1186

1340

1505

1670

1886

1986

2318

H

210

235

264

308

356

400

503

595

705

705

905

910

921

1210