低阻力倒流防止器

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产品

低阻力倒流防止器

Type：DH43X

The Low Resistance Backflow Preventer is a high-efficiency device designed to prevent reverse flow and protect water supply systems from contamination while minimizing pressure drop. Featuring an optimized flow path and advanced sealing technology, this backflow preventer ensures reliable operation and energy efficiency in potable water, fire protection, and industrial systems. Constructed from stainless steel, bronze, or ductile iron, this valve is durable and corrosion-resistant, suitable for applications requiring high flow rates and low maintenance. Its low resistance design reduces energy consumption, making it an ideal choice for systems where pressure loss is a critical concern.

类别：倒流防止器

工作条件建筑施工, 污水处理厂, 水厂

产品概览

Constructed from stainless steel, bronze, or ductile iron, this valve is durable and corrosion-resistant, suitable for applications requiring high flow rates and low maintenance. Its low resistance design reduces energy consumption, making it an ideal choice for systems where pressure loss is a critical concern.

应用

Potable Water Systems: Protects municipal water supply networks from backflow contamination.

Fire Protection: Installed in sprinkler systems and fire hydrant networks.

工业流程： Safeguards process water systems in chemical, pharmaceutical, and food industries.

Irrigation: Prevents fertilizers and chemicals from entering the water supply.

Product Features

低电阻设计 Optimized flow path ensures minimal pressure drop (flow coefficient: Cv ≥ 1.5 for DN50).Ideal for high-flow systems such as water supply and fire protection networks.

Reliable Backflow Prevention: Dual check valves with intermediate pressure relief chamber ensure zero backflow.Compliant with ASSE 1013, CSA B64.4, and EN 1717 standards.

耐用的结构 Body materials: Stainless steel (316L), Bronze (C83600), or Ductile iron (EN-GJS-400-18).Internals: Stainless steel components for corrosion resistance and long service life.

Low Maintenance: Self-cleaning design and easy-access inspection ports simplify maintenance.Replaceable seals and springs reduce downtime and repair costs.

遵守规定： Meets international standards such as ASSE 1013, CSA B64.4, and EN 1717.

运行优势

Energy Efficiency: Low resistance flow minimizes pump energy consumption.

Water Safety: Dual check valves and pressure relief chamber ensure zero backflow contamination.

Space Efficiency: Compact design reduces installation space and simplifies piping layouts.

Ease of Maintenance: Self-cleaning design and replaceable components reduce downtime.

Comparison with Standard Backflow Preventers

特点	Low Resistance Backflow Preventer	Standard Backflow Preventer
Flow Resistance	Low (Cv ≥1.5 for DN50)	Higher (Cv ≤1.0 for DN50)
能源效率	High (reduces pump workload)	Lower (higher pressure loss)
应用	High-flow systems (water supply, fire protection)	General water systems
成本效益	前期成本较高，生命周期成本较低	Lower upfront cost

中型

Sewage, 水

工作条件

建筑施工, 污水处理厂, 水厂

总结

The Low Resistance Backflow Preventer is a high-performance solution for preventing reverse flow and ensuring water safety in potable water, fire protection, and industrial systems. Its low resistance design, durable construction, and compliance with international standards make it an ideal choice for applications requiring energy efficiency and reliable performance. By combining advanced technology with user-friendly operation, this backflow preventer ensures long-term system protection and water quality.

产品参数

尺寸范围	DN50 to DN300 ( 2" to 12")
压力等级	PN16 to PN25 (EN 1092) or Class 150 to Class 300 (ASME B16.34)
温度范围	-10°C to 120°C (EPDM seals) / -20°C to 80°C (NBR seals)
车身材料	Stainless Steel (316L), Bronze (C83600), Ductile Iron (EN-GJS-400-18)
座椅材料	EPDM, NBR, or PTFE for zero leakage
末端连接	Flanged (EN 1092, ASME B16.5)
泄漏等级	Class VI (ISO 5208)