A vertical check valve is a new type of check valve. It features a vertical structure and is installed on the pipeline. It mainly consists of a valve body, valve cover, valve core, and spring. The valve core moves vertically in the water flow, providing a certain degree of backflow prevention. It is suitable for various industrial pipelines.
A swing check valve is also a type of check valve. Its structure allows the valve plate to rotate freely between itself and the valve seat under the action of a spring. When the medium returns, the valve plate closes automatically under the pressure of the medium, preventing backflow. It is suitable for different systems and pipelines.
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Comparison Table: Swing Check Valve vs. Vertical Check Valve
| Comparison Dimension | Swing Check Valve | Vertical Check Valve |
| Working Principle | The disc swings on a hinge or shaft outside the seat to open or close. | The disc moves up and down along the centerline of the valve body. |
| Core Structure | Hinge arm + Pin + Disc (similar to a swinging door). | Guide rod + Disc (usually spring-assisted). |
| Installation Orientation | Primarily Horizontal. For vertical lines, flow must be Upward only. | Exclusively for Vertical lines. Flow must be Upward only. |
| Flow Resistance (Pressure Drop) | Extremely Low. Straight-through flow path; minimal obstruction when open. | Higher. Tortuous flow path (similar to a globe valve); significant pressure drop. |
| Closing Speed | Slow. Long disc travel; takes more time to fully reseat. | Fast. Short travel; usually assisted by a spring for rapid closure. |
| Water Hammer Control | Poor. Prone to "slamming" sounds and hydraulic shock. | Excellent. Often "Silent" type; effectively suppresses water hammer. |
| Sealing Performance | Medium. Relies on backpressure; may have slight leaks at low pressure. | Good. Accurate guiding and spring tension ensure a tighter seal. |
| Media Cleanliness | Lower. Better tolerance for media containing small particles or fibers. | High. Small clearances in guiding parts make it prone to jamming by debris. |
| Wear & Tear | Wear occurs at the hinge pin and arm connection. | Wear occurs at the guide rod and sealing seat. |
| Maintenance | Simple. Intuitive structure, easy to disassemble and repair. | Complex. Requires precise alignment of the internal guiding structure. |
| Typical Applications | Large diameter, long distance, low-velocity pipelines. | High-rise building water supply, pump outlets, confined spaces. |
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FAQ
What is the use of vertical check valve?
Vertical check valves have higher resistance to fluid flow. These valves have high resistance to fluid flow since they are used in pipelines where fluids flow upwards. The fluid pressure must overcome gravitational forces and also the spring force before the closing mechanism opens.
Does it matter if a check valve is vertical or horizontal?
If installed vertically, the disc may not open fully or may slam shut abruptly. Spring or Inline Check Valves: Can typically be installed horizontally or vertically, but vertical installations usually require upward flow. Always confirm orientation in the manufacturer's documentation.
Do swing check valves need to be installed horizontally?
Orientation a. Swing check valves are always installed with the HINGE PIN placed horizontally, and above the pipe centerline (as shown in the pictures at the end of this section). Incorrect installation may result in binding, high head loss, and/or sticking in the open position.