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SL-7106
SHUANGLIN
Not every pipeline calls for the same type of check valve. Where a compact vertical spring check valve suits tight in-line installations, larger horizontal runs often benefit from a different mechanism entirely — one that swings open with minimal resistance and closes under its own weight. That's exactly what SHUANGLIN VALVE's brass horizontal swing check valve is built for.
Inside the valve, a hinged disc (flap) swings on a pivot pin. Forward flow pushes the disc open, allowing water to pass with very little obstruction — the swing design creates a straighter flow path than a spring-loaded poppet, which means lower pressure loss across the valve. When flow slows or reverses, gravity and back-pressure swing the disc closed against its seat, sealing the line before backflow can occur. Because the mechanism relies on gravity rather than a spring, this valve is designed specifically for horizontal pipeline installation, with the hinge oriented so the disc swings correctly.
If you're also looking at SHUANGLIN VALVE's vertical spring check valve, the choice usually comes down to installation orientation and flow characteristics. A spring check valve is compact and works well in vertical or restricted spaces, closing quickly with minimal water hammer. A horizontal swing check valve like this one is better suited to larger horizontal runs where minimizing flow resistance matters, and where the pipeline layout allows for gravity-assisted closure. For mixed installations, many buyers stock both types to match each section of the system.
A hex-head inspection bolt on top of the valve body allows the internal disc and seat to be accessed directly for cleaning or inspection, without removing the valve from the pipeline. This is particularly useful in systems where periodic maintenance is expected, such as pump discharge lines or water treatment piping. The valve body is solid brass, rated to PN16, with female threaded connections available in both BSP and NPT to suit different regional standards, across the full DN15 to DN100 size range.
Horizontal water supply and distribution mains
Pump discharge lines in commercial and industrial systems
Water treatment and filtration piping
Fire protection and sprinkler system branch lines
HVAC and hydronic piping runs installed horizontally
Payment: T/T (Bank Transfer)
Stock Items: Ships within 7 days
Custom Orders: 30 days production time
Logistics: Sea or air freight, with customs clearance assistance
SHUANGLIN VALVE backs every horizontal swing check valve with a 1-year warranty against manufacturing defects, including free repair or replacement where applicable. OEM/ODM services are available for custom thread types, sizing, and private-label packaging on bulk orders.
Can this valve be installed vertically? No. The swing mechanism relies on gravity to close the disc, so it must be installed on a horizontal pipeline for correct operation. For vertical installations, a spring-loaded check valve is the appropriate choice.
Why does this valve have lower flow resistance than a spring check valve? The swinging disc creates a more direct, unobstructed flow path when open, compared to the internal spring and poppet mechanism in a spring check valve, resulting in less pressure drop across the valve.
What is the inspection bolt on top of the valve for? It allows the internal disc and seat to be accessed for cleaning, inspection, or seat replacement without disconnecting the valve from the pipeline, simplifying routine maintenance.
What sizes and thread options are available? SHUANGLIN VALVE produces this horizontal swing check valve from DN15 to DN100, with BSP or NPT threading. Contact us with your specification for a tailored quotation.
Contact SHUANGLIN VALVE's sales team for a detailed quotation, technical drawings, or samples.
