Shanghai Nellway Valve Co., Ltd.

Low resistance backflow preventer(Diaphragm)

Backflow preventer

Low resistance backflow preventer(Diaphragm)

The Low Resistance Backflow Preventer (Diaphragm) is a high-performance device. It prevents backflow while maintaining minimal resistance to fluid flow. This device uses a diaphragm mechanism for reliable protection against fluid contamination. It is optimized for efficient system operation.
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

Low resistance backflow preventer(Diaphragm) Introduction and explanation

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Low resistance backflow preventer(Diaphragm) parameter

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 Product Introduction: Low Resistance Backflow Preventer (Diaphragm)

 Product Overview

The Low Resistance Backflow Preventer (Diaphragm) is a high-performance device. It prevents backflow while maintaining minimal resistance to fluid flow. This device uses a diaphragm mechanism for reliable protection against fluid contamination. It is optimized for efficient system operation.


 Product Advantages

  1. Minimal Pressure Drop: The diaphragm design ensures low resistance to fluid flow. This minimizes pressure drop across the device. As a result, the system operates efficiently and consumes less energy.
  2. Reliable Backflow Prevention: The diaphragm mechanism effectively stops backflow. It protects the fluid supply from contamination and maintains system integrity.
  3. Durable Construction: Made from high-quality, corrosion-resistant materials. This includes stainless steel and reinforced elastomers. The device is durable and performs reliably in various conditions.
  4. Enhanced Flow Efficiency: The diaphragm design reduces turbulence and flow resistance. This ensures smooth fluid movement and minimizes wear on system components.
  5. Easy Maintenance: The device has a straightforward design. It allows for easy inspection and maintenance. The diaphragm can be accessed and replaced easily, simplifying servicing.

 Media and Applications

– Water: Suitable for potable water systems, ensuring clean and safe drinking water.

– Non-Corrosive Liquids: Ideal for non-corrosive fluids, such as industrial water and mild chemicals.


 Usage Locations

– Residential: Protects household water systems, ensuring safe water supply and preventing contamination.

– Commercial Buildings: Ideal for offices, retail spaces, and restaurants, safeguarding water systems from backflow.

– Industrial: Used in factories and production facilities to prevent backflow in fluid transport systems and maintain integrity.

– Municipal Facilities: Applied in city water supply systems and public infrastructure to ensure clean and reliable water distribution.


 Low Resistance (Diaphragm) vs. Conventional Backflow Preventers

  1. Design and Performance

– Low Resistance Backflow Preventer (Diaphragm): Uses a diaphragm mechanism. It minimizes pressure drop and provides effective backflow protection. Its design ensures smooth fluid flow and high efficiency.

– Conventional Backflow Preventer: May use different mechanisms that result in higher pressure drops. This can reduce system efficiency and increase energy costs.

  1. Flow Efficiency

– Low Resistance Backflow Preventer (Diaphragm): The diaphragm design reduces turbulence and flow resistance. It maintains high flow rates and system performance.

– Conventional Backflow Preventer: Often has a more restrictive design, leading to increased turbulence and flow resistance. This can impact overall efficiency.

  1. Pressure Drop

– Low Resistance Backflow Preventer (Diaphragm): Designed to have minimal impact on pressure drop. It ensures efficient fluid movement and reduces energy consumption.

– Conventional Backflow Preventer: May result in higher pressure losses due to its design, affecting system efficiency and increasing operational costs.

  1. Maintenance

– Low Resistance Backflow Preventer (Diaphragm): Features a simple design for easy access and maintenance. The diaphragm can be replaced easily.

– Conventional Backflow Preventer: May involve more complex maintenance procedures. This can increase service time and effort.


 Summary

The Low Resistance Backflow Preventer (Diaphragm) offers advanced backflow protection with minimal impact on system performance. Its diaphragm mechanism ensures low pressure drop and high flow efficiency. Compared to conventional models, it provides easier maintenance and superior performance. This device is ideal for residential, commercial, industrial, and municipal applications. It guarantees fluid safety and system integrity while optimizing energy use and operational efficiency.

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