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What should be paid attention to when choosing electric ball valve
浏览量：载入中... 来源：川熙流体设备（上海）有限公司 发布时间：2019-05-27 Author: Chuan Xi Fluid Equipment (Shanghai) Co., Ltd. Views: Loading ... Source: Sichuan Xi Fluid Equipment (Shanghai) Co., Ltd. Published: 2019-05-27
The electric ball valve is simple in structure and consists of only a few parts, saving data consumption; small size, light weight, small installation size, small driving torque, pressure regulating valve, easy to operate and agile, only need to rotate 90 ° to quickly open It also has good flow regulating effect and closed sealing characteristics. In the application range of large and medium caliber and low and medium pressure, electric ball valve is the dominant valve situation. Cryogenic shutoff valve (valve) A valve that moves along the centerline of the valve seat. According to this type of movement of the valve disc, the change in the valve seat port is proportional to the valve stroke. This type of valve is ideal for shut-off or regulating and throttling applications. The electric ball valve is used to cut off or connect the medium in the pipeline, and can also be used for the regulation and control of fluid. It is a kind of pipeline pressure element for industrial automation process control. When the electric ball valve is in the fully opened position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop occurring through the valve is small, so it has good flow control characteristics.
The electric ball valve has two types of sealing: spring seal and metal seal. Low-temperature shut-off valve This type of valve has a relatively short opening or closing stroke and a very reliable shut-off function. Because the change in the valve seat port is proportional to the stroke of the valve disc, it is very suitable for regulating flow. Elastically sealed valve, the seal ring can be embedded in the valve body or attached to the periphery of the butterfly plate. Metal sealed valves generally have a longer life than elastically sealed valves, but it is difficult to achieve a complete seal. Metal seals can adapt to higher operating temperatures, while elastic seals have the disadvantage of being temperature limited. If an electric ball valve is requested to be used as a flow control, it is important to accurately select the size and type of the valve. The construction principle of the electric ball valve is particularly suitable for manufacturing large-caliber valves. Electric ball valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also used in the cooling water system of thermal power stations.
There are two types of commonly used electric ball valves: wafer type electric ball valves and flange electric ball valves. The wafer type electric ball valve is connected between the two pipeline flanges with stud bolts. The flange type electric ball valve is provided with a flange on the valve, and the two ends of the valve are bolted to the pipeline flange. The strength performance of the valve refers to the ability of the valve to be subjected to the pressure of the medium. The valve is a mechanical product subject to internal pressure, so it must have sufficient strength and rigidity to ensure long-term use without cracking or deformation. So how do you choose?
1. It is a control element. It is very extensive in the use of fluid pipeline systems, and it has many uses. It has a very good effect on controlling flow, pressure, reflux, etc. Because the quality of the electric ball valve has a great impact on the safety of the pipeline, when selecting the electric ball valve, it must be selected according to a certain process and basis.
2. Clear the caliber of your company's pipeline, and know what caliber and connection method need to choose the electric ball valve.
3. According to the needs of the pipeline, first determine some common parameters of electric ball valves, such as discharge ability, flow resistance that can be agreed, the diameter of the seat hole, etc. If these parameters are not selected correctly, the role of the electric ball valve to control the flow, Will be greatly discounted.
4. According to the working temperature of the pipeline, select suitable raw materials. Of course, the working pressure of the pipeline must also be taken into account.