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Backflow Preventer
Product overview
The DF41X Backflow preventer is a safety device used to prevent the backflow pollution of domestic drinking water pipes. It is composed of a two-stage check valve plus a drain. The upper cavity of the diaphragm communicates with the inlet end of the first-stage check valve. This valve is a safety type, a new type of valve that prevents backflow pollution of drinking water to ensure the safety and sanitation of domestic drinking water.
Product Features
Backflow preventer is a drainage and pressure relief device added to the secondary check system. In this way, even if the secondary check seal is damaged at the same time, it can also play a role in preventing backflow pollution.
Execution Standard
Flange end：GB/T17241.6 GB/T9133
Test & check：GB/T13927 AP1598
Performance Parameter
Nominal diameter：DN50~200mm
Nominal Pressure：PN1.0～1.6MPa
Applicable media：Clean water
Applicable temperature：≤80℃
Main materials：Cast iron, cast steel, ball milled cast iron, stainless steel
