What is Single Disc Wedge Gate Valve ?
The gate sealing surface of the wedge gate valve is wedge-shaped, that is, it forms a certain angle with the center line of the gate. The gate is pushed closed by the valve stem. As the thrust of the valve stem increases, the positive pressure acting on the wedge-shaped gate sealing surface increases, which can form a forced seal. The sealing of low-pressure media is improved. At the same time, the gate sealing surface leaves the valve seat at the moment of opening, reducing the wear of the sealing surface.
Advantages of single disc wedge gate valve
- 01The wedge gate valve has a reasonable structural design, reliable sealing, smooth passage, and small flow resistance coefficient.
- 02The gate and valve seat sealing surfaces are wear-resistant, high-temperature resistant, corrosion-resistant, and abrasion-resistant, and have a long service life.
- 03The wedge elastic gate or the steel wedge gate structure is adopted, and the medium and large diameters are equipped with rolling bearings, which are flexible to switch and easy to open and close.
- 04The valve stem is tempered and surface nitrided, and has good corrosion resistance, abrasion resistance and wear resistance.
- 05Various piping flange standards and flange sealing surface types can be used to meet various engineering needs and user requirements.
- 06The valve body materials are complete, and the fillers and gaskets can be reasonably selected according to the actual working conditions or user requirements, which can be applied to various pressure, temperature and medium conditions.
Design Standard
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| The characteristics of single disc wedge gate valve |
The wedge rigid gate is an integral wedge-shaped gate with an inverted T-shaped groove on the upper end of the gate, which is connected to the valve stem through the inverted T-shaped groove. The sealing surfaces on both sides of the wedge-shaped gate are sealed with the valve seats on both sides respectively. The inverted T-shaped groove of the gate and the valve stem are movably connected, which can compensate for the errors caused by processing, so that the sealing surface of the gate and the sealing surface of the valve seat fit together better and complete the sealing. The wedge elastic gate is based on the rigid single gate, and an annular groove is machined on the vertical bisecting surface of the gate, and only the center of the gate is connected together. The gate sealing surface has a certain elastic deformation capacity. When the gate is closed, the deviation of the wedge angle between the gate sealing surface and the valve seat sealing surface can be compensated, thereby ensuring the sealing surface effect. The wedge gate valve has a low accuracy requirement for the sealing surface angle, and temperature changes are not easy to cause wedging. When the sealing surface is worn, a gasket can be added for compensation. The valve body of the wedge gate valve is provided with a guide mechanism (guide rib) to prevent the gate from rotating when opening or closing, and ensure that the sealing surface of the gate and the valve seat are aligned accordingly. |
| 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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