Shanghai Nellway Valve Co., Ltd.

Copper double check backflow preventer

Backflow preventer

Copper double check backflow preventer

NameparameterNameparameter
Nominal DiameterDN50-DN500ConnectionFlange(RF,MF,RJ)
Nominal PressurePN10-PN16Drive ModeElectric,Pneumatic,Manual,Hydraulic
Medium Temperature-29-300℃SealingSoft seal/Hard seal
MaterialCarbon steel:A216 WCB;WCC; A105

Stainless steel:304;316;304L;316L

GGG40(GJS-400-15);GGG50(GJS-500-7)

Design StandardsAPI、ANSI、DIN、GB
Working ConditionsChemical; Petroleum; Natural gas; Water; Paper; MetallurgyMediumWater;Gas

Copper double check backflow preventer Introduction and explanation

Table of Contents

Product Introduction: Copper Double Check Backflow Preventer

Product Overview:

The Copper Double Check Backflow Preventer is designed to prevent the reverse flow of liquids, gases, or other media. It features a copper construction and a dual check design. This design ensures both safety and reliability. The device is particularly suitable for applications where contamination prevention is crucial. It is ideal for potable water systems and industrial pipelines.


Product Advantages:

  1. Dual Backflow Prevention: The dual check design ensures that media cannot flow backward. This effectively prevents backflow and safeguards the system.
  2. High-Quality Material: The preventer is constructed from premium copper alloy. It offers excellent corrosion resistance and durability. The superior properties of copper ensure long-term, stable performance.
  3. Efficient Sealing: The device features precision manufacturing and high-quality sealing components. These provide exceptional sealing performance and prevent leaks and backflow.
  4. Low Maintenance: The design of the preventer is simple. It allows for easy installation and requires minimal maintenance. This reduces the complexity of system operation and upkeep.
  5. High Pressure Tolerance: The preventer can withstand higher operating pressures. This makes it suitable for high-pressure applications.

Product Structure:

The Copper Double Check Backflow Preventer includes several key components:

– Body: Made from high-quality copper alloy. This provides durability and corrosion resistance.

– Check Discs: Features two check discs. These ensure reliable backflow prevention through precise design and manufacturing.

– Spring: Assists in the quick return of the check discs. It ensures media flows in only one direction.

– Seal Rings: High-quality seal rings deliver excellent sealing performance. They prevent leakage.

– Guiding Mechanism: Ensures stable operation and precise return of the check discs.


Applicable Media:

The Copper Double Check Backflow Preventer is suitable for various media, including:

– Potable Water: Ensures that drinking water systems remain uncontaminated.

– Industrial Water: Suitable for use in industrial pipelines carrying water or other liquid media.

– Gases: Can be used in gas systems to prevent reverse flow.

– Chemical Solutions: Effective in chemical processing systems to prevent backflow of media.


Application Areas:

  1. Potable Water Systems: Used in municipal and residential water systems. It prevents backflow and contamination.
  2. Industrial Pipelines: Ideal for various industrial applications. These include pharmaceutical, food processing, and chemical industries. It ensures media does not flow backward.
  3. Fire Protection Systems: Prevents backflow in firefighting systems. It protects equipment and ensures proper operation.
  4. Building Projects: Used in plumbing systems within buildings. It ensures safe and stable water flow.

The Copper Double Check Backflow Preventer is a crucial safety device. It is widely used in locations where backflow prevention and contamination protection are essential. Its high-quality material, dual check design, and excellent sealing performance ensure the safety and reliability of piping systems. This makes it an indispensable component in modern infrastructure.

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