Vacuum Breaker Valve has the following structural features:
1. Valve body structure
The valve body is the outer shell of the entire valve, and its shape and material vary depending on the application scenario. Generally speaking, the valve body is made of sturdy metal materials such as cast iron, cast steel or stainless steel to withstand the pressure in the pipeline system. In some small civil pipeline systems, engineering plastic valve bodies are also used. This type of valve body is lightweight, corrosion-resistant and low-cost. In terms of shape, valve bodies come in many forms, such as straight-through and angle types. The straight-through valve body has a simple structure and a straight internal channel. The fluid has less resistance when flowing through it, and is suitable for large-flow pipeline systems, such as large industrial water pipelines; the angle valve body can change the flow direction of the fluid, making it easier to install in complex pipeline layouts and better adapt to space constraints.
2. Valve disc design
The valve disc is a key component of the vacuum breaker valve, and its main function is to control the inflow and outflow of air. The valve disc is usually made of metal or plastic as the main part, and the sealing surface in contact with the valve body is made of elastic materials, such as rubber or silicone, to ensure good sealing. When the pressure in the pipeline is normal, the valve disc fits tightly on the valve seat under the action of its own gravity, spring force or other external forces to prevent air from entering the pipeline. Once a vacuum appears in the pipeline, the valve disc will open quickly under the action of the internal and external pressure difference, allowing outside air to enter the pipeline. In order to ensure the accuracy and reliability of the valve disc action, its opening and closing actions are usually coordinated with some mechanical structures, such as springs, levers or heavy hammers.
3. Air inlet and outlet settings
The air inlet is used to connect to the outside atmosphere. In order to prevent dust and impurities from entering the pipeline, a protective net or filter is usually installed at the air inlet. These protective devices can effectively filter impurities in the air, ensure that the air entering the pipeline is clean, and avoid contamination or blockage of the liquid or gas medium in the pipeline. The air outlet is connected to the pipeline system that needs to be protected. Its caliber is designed according to the flow and size requirements of the pipeline, and there will be good sealing measures at the connection to prevent air leakage.
4. Perfect sealing structure
In addition to the seal between the valve disc and the valve seat, the vacuum breaker valve also has good sealing design in other parts. For example, gaskets, sealing rings and other sealing elements are usually used between the valve body and the valve cover, and at the connecting flange to ensure that the entire valve will not leak media during operation. Some advanced vacuum breaker valves also use special sealing technologies, such as multi-layer sealing structures or high-performance sealing materials, to improve the durability and reliability of the seal.
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