What is Power Station Check Valve ?
Power station check valve refers to the valve that automatically opens and closes the valve flap relying on the flow of the medium itself to prevent the backflow of the medium. The power station check valve is an automatic valve whose main function is to prevent the backflow of the medium, prevent the reversal of the pump and the drive motor, and the discharge of the container medium. It can be used for water supply and drainage system, power plant water circulation system pump outlet to prevent media backflow and prevent water hammer damage to the pump.
Advantages of power station check valve
- 01Short disc travel and high sensitivity greatly reduce the time required for disc closing and effectively reduce the water hammer pressure of the vertical check valve.
- 02The sealing surface is made of alloy steel or cemented carbide, and the matching of sealing materials is reasonable and the service life is long.
- 03Built-in pin structure, reduce leakage, use more reliable.
- 04The valve stem is an integrated design of forging parts, and the shaft shoulder at the end of the valve stem can prevent the valve stem from flying out under pressure during use.
- 05High temperature medium sealing seat will choose metal hard sealing material, metal material will not be affected by high temperature sealing condition.
- 06Metal seal structure design, valve disc and seat sealing surface surfacing carbide, after hardening treatment, high temperature and high pressure, erosion resistance, impact resistance, reliable sealing.
Design Standard
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| The characteristics of power station check valve |
The valve has a large flow section, small flow resistance, the plate adopts a streamlined structure, water medium flowing through the plate is not easy to produce turbulence and cavitation, the valve can better protect the pipeline system in front of the valve and behind the valve. Extend the service life of piping system. The sealing surface of the valve body and valve disc is surfacing alloy steel or hard alloy, even in the medium with particles, the sealing surface will not wear and erode. The sealing surface of the valve disc and the seat will not produce strong friction in the operation of the valve, which extends the service life of the valve. The cavity in the body is small, which can effectively reduce the direct current of the medium, and the molding process is used, which can ensure the density of the sealing surface is good, and the fluorine-lined material can effectively achieve zero leakage. The valve cover is sealed by pressure self-tightening. The higher the pressure of the sealing ring, the better the sealing effect. Ensure the valve under high temperature and high pressure conditions have superior sealing performance. |
| Technical Parameters | |
| Size | DN15-DN2000, 1/2''-80'' |
| Pressure | PN6-PN760, Class150-Class4500 |
| 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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