Rising Stem Gate Valves

Hanno Valve high quality Rising Stem Gate Valves suitable for a variety of occasions, especially in the need for frequent operation or need to intuitively understand the status of the valve, such as fire, water supply and drainage.

Rising Stem Gate Valves, also known as valve stems. Valve rising stem refers to the linear movement of the valve stem along with the valve plate, such as a regular lifting stem gate valve (also known as a rising stem gate valve). Usually, there are trapezoidal threads on the lifting rod, which convert rotational motion into linear motion through the nut at the top of the valve and the guide groove on the valve body, that is, convert operating torque into operating thrust.

The opening and closing component of a gate valve is a gate plate, and the direction of movement of the gate plate is perpendicular to the fluid direction. A gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.

The plate has two sealing surfaces, and the most commonly used mode gate valve has two sealing surfaces that form a wedge shape. The wedge angle varies with the valve parameters, usually 50 degrees, and 2 ° 52 'when the medium temperature is not high

The gate of a wedge gate valve can be made as a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing,

This type of gate is called an elastic gate.

The types of Rising Stem Gate Valves can be divided into wedge gate valves and parallel gate valves according to the sealing surface configuration. Wedge gate valves can also be divided into single pole, double plate, and elastic gate valves; Parallel gate valves can be divided into single gate plate and double gate plate. According to the thread position of the valve stem, it can be divided into two types: rising stem gate valves and hidden stem gate valves.

When the open stem gate valve is closed, the sealing surface can be sealed solely by the medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the medium pressure to ensure the sealing surface is sealed, which is called self sealing. Most gate valves use forced sealing, which means that when the valve is closed, external force must be used to forcefully press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.‌‌‌‌‌

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