Stainless steel threaded low resistance backflow preventer

Product Overview

The Stainless Steel Threaded Low Resistance Backflow Preventer is a compact and efficient device designed to prevent backflow and protect water systems from contamination while minimizing pressure drop. Constructed of 304 or 316L stainless steel with threaded connections (NPT or BSP) for easy installation in tight spaces, the valve is ideal for potable water, HVAC and industrial applications.

Its optimized flow path ensures minimum resistance, thus reducing energy consumption and maintaining system efficiency. The double check valve design with pressure relief chamber ensures zero backflow and complies with international water safety standards.

Product Characteristics

Low resistance design: streamlined internal geometry reduces pressure drop (flow coefficient: Cv ≥ 1.5 for DN50). Ideal for systems requiring energy savings and high flow rates.

Threaded connection: NPT (National Pipe Thread) or BSP (British Standard Pipe Thread) for quick, tool-free installation. Compact design saves space and is suitable for tight installations.

Durable stainless steel construction: 304 (1.4301) or 316L (1.4404) stainless steel resists corrosion in mildly corrosive environments. Electropolished (Ra ≤ 0.8 μm) or passivated surface finishes enhance durability.

Dual Check Valve System: Two independent check valves with intermediate relief chambers ensure fail-safe backflow prevention. Leakage class VI (ISO 5208) for zero backflow.

Compliance: Complies with ASSE 1013, EN 1717 and ISO 2852.

Product Advantages

Energy saving: low pressure drop reduces pump workload and operating costs.

Corrosion resistance: Suitable for mildly corrosive environments (e.g. chlorinated water).

EASY TO INSTALL: Threaded connections eliminate the need for welding or flanging, saving labor and time.

Low maintenance costs: self-cleaning design and replaceable seals extend service life.