Threaded Swing Check Valve for Plumbing Water Supply

Product Description

Our Threaded Swing Check Valve (also known as industrial one-way check valve) is a premium fluid control solution engineered to eliminate medium backflow and guarantee unidirectional fluid flow in commercial and industrial pipeline systems. Manufactured in strict compliance with API 6D, BS 1868, and DIN 3356 design standards, and tested per API 598 inspection protocols, this swing check valve for plumbing delivers consistent, reliable performance across diverse working conditions. Available in sizes from 1/2” to 20”, with pressure ratings of 150LB to 900LB and an operating temperature range of -19℃ to 425℃, our valve accommodates common mediums including water, oil, gas, and steam. Constructed with durable carbon steel (WCB) and stainless steel (CF8/CF8M) materials, it is built to withstand the rigors of continuous industrial operation, making it the top choice for pipeline engineering contractors, facility operators, and commercial plumbing system integrators.

Key Features & Industry-Leading Benefits

Zero-Leakage Fully Enclosed Structure

This industrial threaded swing check valve features an innovative swing design with a built-in rocker arm, with all valve discs fully enclosed within the valve body to eliminate external leakage risks. The spherical connection between the valve disc and rocker arm enables 360° free movement and accurate trace position compensation, ensuring a tight seal even after long-term use. With no external penetration points beyond the mid-flange gasket and sealing ring, it eliminates potential leakage paths to protect your pipeline system and reduce unplanned maintenance downtime.

Minimal Flow Resistance for Optimized Efficiency

Unlike traditional check valves that create significant flow turbulence, our low flow resistance swing check valve uses a disc that swings around a fixed internal shaft, drastically reducing medium flow resistance. This design maximizes pipeline flow efficiency, lowers energy consumption for fluid transportation, and reduces long-term operational costs for your facility.

Flexible Operation & Wide Compatibility

The round/oval valve disc rotates around the valve stem axis, delivering sensitive, flexible opening and closing response to rapid pressure changes. It supports installation on horizontal, vertical, and inclined pipelines (with medium flowing bottom-to-top for vertical lines), and is especially well-suited for large-diameter pipeline applications, offering unmatched versatility for diverse project requirements.

• Design Standard: API 6D / BS 1868 / DIN 3356

• End Flange: ASME B16.5 / JIS B2220 / DIN 2543

• Face to Face: ASME B16.10 / JISB2002 / BS EN558-1

• Inspection and testing: API598

Industrial Applications

Our API 6D compliant swing check valve is widely deployed across critical industrial and commercial sectors where backflow prevention is non-negotiable. It is a staple in municipal and commercial water supply and drainage systems, where it prevents reverse water flow to safeguard water supply integrity and avoid sewage backflow contamination. In petrochemical plants, it stops oil and gas backflow to maintain production safety and prevent hazardous medium spills. It also plays a vital role in power generation facilities, metallurgical mills, and industrial processing plants, protecting equipment from damage caused by medium backflow and ensuring continuous, stable system operation.

Swing check valve

1) Design Standard: API 6D,BS 1868,DIN 3356,GB/T12236

2) End Flange: ASME B16.5.JIS B2212.DIN 2543,GB9113

3) Size: 1/2"-20"

4) Pressure: 150lb~900lb

5) Temperature: -19℃~425℃

6) Materials: Carbon steel/Stainless steel

7) Suitable Medium: Water,Oil,Gas,Steam

FAQ About This Threaded Swing Check Valve

What are the installation requirements for this swing check valve?

This plumbing system swing check valve supports flexible installation on horizontal, vertical, or inclined pipelines. For vertical pipeline installations, ensure the medium flows from bottom to top to maintain optimal valve performance and sealing efficiency.

Does this threaded swing check valve cause high flow resistance?

No. The valve disc swings around a fixed internal shaft, creating minimal obstruction to medium flow. This design delivers far lower flow resistance than many alternative check valve types, supporting high-efficiency fluid transportation.

What international standards does this swing check valve meet?

Our valve is designed and manufactured in full compliance with API 6D, BS 1868, and DIN 3356 standards, with inspection and testing performed strictly per API 598 protocols, ensuring full alignment with global industrial quality requirements.