Classification and principle of cast steel gate valve

Cast steel gate valves can be divided into wedge gate valves and wedge gate valves according to the sealing surface configuration. Wedge gate valves can also be divided into single gate type, double gate type and elastic gate type. Parallel gate valves can be divided into single and double gate valves. According to the position of the screw thread of the stem, it can be divided into two types: open stem gate valve and dark stem gate valve.

So how does it work?

The opening and closing parts of cast steel gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. Sealing face has two gate, two of the most commonly used mode gate valve sealing surface form a wedge, the wedge Angle vary with the valve parameters, usually in the form of 50, when the medium temperature is not high for 2 ° 52 '. Wedge gate valve gate plate can be made into a whole body, called rigid gate plate; Cast steel gate valves can also be made into slightly deformed gate plates to improve their technology and make up for the deviation of the sealing surface Angle during processing. These gate plates are called elastic gate plates. When the cast steel gate valve closes, the sealing surface can be sealed only by the medium pressure, that is, by the medium pressure to press the sealing surface of the gate plate to the seat on the other side to ensure the sealing surface, which is self-sealing. Most gate valves are hermetically sealed, that is, when the valve is closed, it must rely on external force to force the gate to the seat to ensure the sealing of the sealing surface. A cast steel gate valve whose gate plate moves in a straight line along with the stem is called an elevator gate valve. Generally, there are trapezoid thread on the lifting rod. Through the nuts on the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is, the operating torque is changed into operating thrust.

And in what industries?

All kinds of industrial automation production pipeline flow, pressure, temperature control. For example: electricity, metallurgy, petrochemical, environmental protection, energy management, fire control system, etc.

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