Shanghai Nellway Valve Co., Ltd.

Pressure reducing backflow preventer

Backflow preventer

Pressure reducing backflow preventer

The Pressure Reducing Backflow Preventer is a specialized valve. It is designed to regulate system pressure and provide reliable backflow prevention. This preventer can result in some pressure loss at the outlet due to its design. However, it offers superior protection against reverse flow. This ensures the integrity of the fluid supply and is critical for preventing contamination.
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

Pressure reducing backflow preventer Introduction and explanation

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Product Introduction: Pressure Reducing Backflow Preventer

Product Overview:

The Pressure Reducing Backflow Preventer is a specialized valve. It is designed to regulate system pressure and provide reliable backflow prevention. This preventer can result in some pressure loss at the outlet due to its design. However, it offers superior protection against reverse flow. This ensures the integrity of the fluid supply and is critical for preventing contamination.


Product Advantages:

  1. Highly Reliable Backflow Prevention: This valve effectively prevents reverse flow. It ensures that contaminated or undesired fluids do not re-enter the clean supply. This protects the quality and safety of the system.
  2. Effective Pressure Regulation: The valve reduces high incoming pressure to a manageable level. Despite some pressure loss, it helps protect downstream equipment and ensures safe system operation.
  3. Durable and Robust Construction: Made from high-quality, corrosion-resistant materials, the valve is built to last. Its robust design ensures long-term durability in challenging conditions.
  4. Ease of Maintenance: The valve’s design allows for easy access to internal components. This simplifies inspection and maintenance procedures, reducing downtime and costs.
  5. Integrated Design: The valve combines pressure reduction and backflow prevention in a single unit. This simplifies system design and installation, making it a convenient choice.

Product Structure:

The Pressure Reducing Backflow Preventer includes several key components:

– Pressure Reducing Valve: This component lowers incoming pressure to a preset level, ensuring safe operation within pressure limits.

– Backflow Prevention Mechanism: The integrated check mechanism provides reliable backflow prevention. It effectively stops reverse flow.

– Body: Constructed from durable, corrosion-resistant materials, the body ensures longevity and reliability.

– Seals and Gaskets: High-quality seals and gaskets prevent leaks and maintain consistent performance under varying pressure conditions.

– Adjustment Mechanism: The valve includes an easy-to-use adjustment mechanism. This allows fine-tuning of pressure settings to meet specific system requirements.


Applicable Media:

The Pressure Reducing Backflow Preventer is suitable for various media, including:

– Potable Water: Ideal for municipal and residential water systems. It maintains water quality and safety.

– Non-Potable Water: Suitable for non-potable water systems, such as irrigation or industrial water supplies. It provides reliable backflow prevention.

– Industrial Fluids: Effective in industrial applications where both pressure regulation and backflow prevention are critical.

– Irrigation Systems: Used in agricultural and landscaping irrigation systems. It manages water pressure and prevents contamination of the clean water supply.


Application Areas:

  1. Residential Water Systems: Used in homes to regulate water pressure and protect against backflow. It ensures the safety and efficiency of the water supply.
  2. Commercial and Public Buildings: Installed in commercial buildings, schools, hospitals, and other public facilities. It provides consistent water pressure and reliable backflow prevention.
  3. Industrial Facilities: Suitable for industrial applications where controlling fluid pressure and preventing backflow are essential for system integrity.
  4. Irrigation Systems: Applied in agricultural and landscaping irrigation systems. It ensures proper water pressure and prevents the reverse flow of contaminated water into the clean supply.
  5. Fire Protection Systems: Used in fire protection systems to maintain proper pressure levels and prevent backflow. It ensures the system remains effective.

The Pressure Reducing Backflow Preventer may cause some pressure loss, but it offers excellent backflow prevention. Its durable construction and dual functionality make it an essential component for many fluid systems.

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