national standard gate valve
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I. Product Overview:
Gate Valve Overview The opening and closing element of a gate valve is the gate, whose movement direction is perpendicular to the fluid direction. A gate valve can only be fully opened or fully closed, and is not suitable for regulation or throttling. The gate has two sealing surfaces; the two sealing surfaces of the most commonly used wedge gate valves form a wedge shape, and the wedge angle varies with valve parameters, usually 50°. The gate of a wedge gate valve can be made as a single piece, called a rigid gate; it can also be made as a gate that can produce slight deformation to improve its processability and compensate for deviations in the sealing surface angle during processing. This type of gate is called an elastic gate. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, that is, the medium pressure presses the sealing surface of the gate against the valve seat on the other side to ensure the sealing of the sealing surface, which is called self-sealing. Most gate valves adopt forced sealing, which means that when the valve is closed, external force is required to forcibly press the gate against the valve seat to ensure the sealing performance of the sealing surface. A gate valve whose gate moves linearly together with the valve stem is called a rising stem gate valve. Usually, there is a trapezoidal thread on the rising stem, and the rotational motion is converted into linear motion through the nut at the top of the valve and the guide groove on the valve body, that is, the operating torque is converted into operating thrust. In some valves, the valve stem nut is located on the gate, and the handwheel rotates to drive the valve stem to rotate, thereby lifting the gate. This type of valve is called a rotating stem gate valve or a non-rising stem gate valve.
II. Product Features:
1. Small fluid resistance, and the sealing surface is less subject to scouring and erosion by the medium.
2. Labor-saving for opening and closing.
3. No restriction on medium flow direction, no turbulence, and no pressure drop.
4. Simple shape, short structural length, good manufacturability, and wide application range. Types of Gate Valves: According to the configuration of the sealing surface, they can be divided into wedge gate valves and parallel gate valves. Wedge gate valves can be further divided into single-gate, double-gate, and elastic-gate types; parallel gate valves can be divided into single-gate and double-gate types. According to the thread position of the valve stem, they can be divided into two types: rising stem gate valves and non-rising stem gate valves.
| Industry Category | Machinery & Equipment/Valves/Gate Valves |
|---|---|
| Product Category | |
| Brand: | 上海舟腾泵阀制造有限公司 |
| Spec: | Z41H-25 |
| Stock: | 99 |
| Manufacturer: | 上海舟腾泵阀制造有限公司 |
| Origin: | 113120 |
