Threaded Swing Check Valve

Product Overview
The Threaded Swing Check Valve is a compact, thread-connected one-way flow control valve tailored for small-bore pipeline systems. Different from wafer and flanged check valves designed for large industrial pipelines, this threaded swing check valve adopts internal thread connection and miniature swing disc structure, focusing on lightweight installation and flexible anti-backflow protection for small-caliber pipes.
Operating purely by medium flow gravity and fluid thrust, the internal swing disc opens freely with forward flow and automatically swings back to close tightly once backflow occurs. Manufactured from high-quality stainless steel, the valve effectively resists rust and scale accumulation. With simple structure, flexible action and low cost performance, it is widely used in residential plumbing, small machinery supporting pipelines and miniature industrial circulation systems, serving as the most common and practical one-way protection valve for small pipe networks.
Core Product Features & Unique Advantages
•Integrated Threaded Connection Design — Adopts standard internal BSP or NPT thread, enabling direct screwing installation without extra flanges or accessories. It saves installation costs and shortens on-site construction time significantly for small-bore pipelines.
•Flexible Free Swing Disc Structure — The internal lightweight swing disc moves freely without spring restriction, featuring ultra-low opening resistance. It responds sensitively to weak flow pressure, ensuring smooth medium circulation in low-flow pipeline systems.
•Ultra-Compact & Lightweight Body — Miniature integrated structure occupies minimal pipeline space, perfectly suitable for narrow pipe layouts, equipment built-in pipelines and small-space installation scenarios where large valves cannot be deployed.
•Effective Gravity Anti-Backflow Performance — Reliable gravity closing principle avoids spring fatigue and failure risks existing in spring-loaded check valves. It maintains stable long-term sealing performance with fewer vulnerable parts.
•Scale-Resistant & Self-Cleaning Flow Channel — Smooth inner wall and large swing movement range prevent impurity deposition and scale blockage. The self-flushing effect of medium flow keeps the valve interior clean during long-term operation.
•Hygienic Stainless Steel Material — Full stainless steel casting avoids secondary pollution, rust and mildew. It fully meets drinking water and domestic water supply standards, suitable for civil and sanitary pipeline systems.
•Low Operation Noise & Stable Performance — Gentle swing closing action without rigid impact, effectively reducing pipeline noise and vibration. It ensures quiet and stable operation for domestic and indoor pipeline systems.
•Wide Small-Bore Size Coverage — Covers common small caliber sizes from 1/2 inch to 2 inch, fully matching conventional domestic plumbing and small industrial pipeline specifications.
•Maintenance-Free Daily Operation — Simple mechanical structure with no complex accessories. It requires no regular cleaning, lubrication or adjustment, greatly reducing daily pipeline maintenance workload.

Technical Specifications
•Product Name: Threaded Swing Check Valve
•Material: Premium Stainless Steel 304 / 316
•Connection Type: Internal Thread (BSP / NPT Standard)
•Pressure Grade: PN10 / PN16
•Applicable Medium: Tap water, domestic water, light oil, air, weak corrosive liquid
•Size Range: 1/2” ~ 2” (DN15 ~ DN50)
•Working Temperature: 0℃ ~ 120℃
•Working Principle: Medium flow driven gravity swing closing
•Applicable Pipe Type: Small-bore horizontal pipeline
Professional Application Scenarios
This threaded swing check valve is specially optimized for small-caliber pipeline anti-backflow scenarios, widely used in civil plumbing and miniature industrial systems:
Residential & Domestic Plumbing — Ideal for household water supply pipelines, water heater inlet and outlet pipes, and indoor branch water pipes, preventing water backflow and cross-flow pollution of domestic water.
Small Mechanical Equipment Pipelines — Applied in cooling water circulation pipelines of small machinery, hydraulic equipment auxiliary pipelines and air compression systems to stabilize one-way medium transmission.
Commercial Indoor Water Systems — Suitable for office buildings, shops and hotel indoor small-bore water supply pipelines, ensuring stable water pressure and safe water supply.
Light Industrial Circulation Systems — Used for small water treatment equipment, laboratory fluid pipelines and miniature industrial circulating water systems to avoid medium backflow damaging precision equipment.
Agricultural & Civil Water Facilities — Perfect for small water pump matching pipelines and farm irrigation branch pipes, protecting water pump equipment from backflow water impact.
Why Choose ZTE VALVE Threaded Swing Check Valve
ZTE VALVE focuses on the production of civil and light industrial miniature pipeline valves. Every threaded swing check valve adopts precision thread processing and strict sealing testing to ensure smooth thread matching and no leakage. Different from heavy-duty industrial check valves, this product is designed for small-bore pipeline scenarios, featuring targeted compact structure, low resistance and high cost performance. With sufficient stock of conventional sizes, fast delivery and reliable after-sales service, our threaded check valves are widely recognized by plumbing contractors, equipment manufacturers and engineering distributors worldwide.