What is Swing Check Valve ?
The opening and closing mode of the swing check valve disc is rotation rather than left and right movement. The fluid passage direction must be on the side that can impact the disc to rotate. The closing part of the swing check valve is a disc or disk equivalent to the pipe diameter, suspended in the valve body. The disc opens under the action of fluid force when the fluid flows in the positive direction, and closes under the influence of weight and backflow fluid pressure when the working pressure decreases.
Advantages of swing check valve
- 01The valve disc of the swing check valve can effectively reduce the water hammer pressure by closing quickly.
- 02It has low fluid resistance and strong flow capacity, and is suitable for fluids with high viscosity and solid particles.
- 03The valve pressure-bearing parts are cast using precision casting technology, with beautiful surface quality, no surface defects such as sticky sand and cold shut; the internal quality is stable, without internal defects such as looseness, sand holes, and cracks.
- 04The valve disc rotates around the valve seat axis to achieve opening and closing, and the process is smooth.
- 05The swing check valve is more compact in structure length than the traditional flange check valve, which makes it have obvious advantages in volume, weight and length.
- 06It is easy and flexible to install and is suitable for horizontal and vertical pipelines.
Design Standard
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| The characteristics of swing check valve |
The swing check valve is usually equipped with an auxiliary spring and a heavy hammer structure to improve the sealing of the pipeline and ensure a good sealing effect under low pressure conditions. At the same time, a damping structure is also set on the valve disc to avoid the water hammer phenomenon caused by the sudden closing of the valve disc when the medium flows in the pipeline, thereby reducing the wear of the valve seat. The internal rocker arm swing structure is adopted. All the opening and closing parts of the valve are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket or sealing ring at the middle flange, there is no external leakage point as a whole, which eliminates the possibility of valve leakage. The swing check valve rocker arm and valve disc connection adopts a spherical connection structure, which makes the valve disc have a certain degree of freedom within the range of 360° and has appropriate micro-position compensation. The sealing surface of the disc and seat of the swing check valve is made of stellite cobalt-based hard alloy surfacing, which is wear-resistant, high-temperature resistant, has good anti-scratch performance and long service life. |
| Technical Parameters | |
| Size | DN15-DN1500, 1/2''-60'' |
| Pressure | PN10-PN420, Class150-Class2500 |
| Temperature | -200°C to 650°C |
| Connection Type | Flange, Thread, Wafer, Welded |
| Operation Mode | Manual, Pneumatic, Electric, Hydraulic, Gear operation |
| Materials | ||
| Valve Body | Forged | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, etc |
| Cast | WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc | |
| Valve Stem | F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500, N08020, Inconel625, Incoloy825, etc | |
| Valve Disc | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500，Incoloy825，WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc | |
| Seat Sealing | SS, BR, CU, AS, CS, AL, PTFE, NBR, FKM, AI203, etc | |
| Design Standards | |
| Valve Body | API 6D, API 608, ASME B16.34, DIN 3357, BS 5351, GOST 9833, JIS B2071, GB/T 12237, etc |
| Flange | ANSI B16.5, EN 1092-1, JIS B2220, GB/T 9113, ASME B16.47, GOST 12821, DIN 2543-2545, etc |
| Connection | ANSI B16.10, ASME B16.25, JIS B2212, GOST 33259, DIN 3202, etc |
| Test Standards | API 598, ISO 5208, BS EN 12266, ASME B16.104, GOST 9544-2015, JIS B2003, DIN 3230, etc |
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