As a new type of ball valve device that has been widely used in recent years, threaded ball valves are widely loved and concerned by consumers. The origin of the name of the threaded ball valve is mainly due to the threaded connection method when it is connected to the pipeline. In terms of specific materials, it is also divided into carbon steel, stainless steel, low temperature steel and ductile cast iron. So, compared to other ball valves, what are the characteristics of threaded ball valves?
1. The threaded ball valve is generally divided into integral type, two-section type and three-section type in structure. The layout of each structure is reasonable and the shape is beautiful, which conforms to the aesthetics of most consumers. Among them, the two-piece and three-piece screw ball valves are connected by There are also butt welding and socket welding methods, and with international standard bracket platform and locking device, the driving mode can be divided into three different modes: manual, electric and pneumatic.
2. The valve seat is made of an elastic sealing structure, which is easy to start and close, and the valve stem part uses an inverted-sealed bottom-mounted structure, which effectively prevents the valve stem from being flushed out when the valve cavity is abnormal. Under such a design structure, the fluid resistance in the threaded ball valve becomes smaller, and even if the medium passes through, it will not cause erosion of the valve seal.
3. It only needs to rotate half a circle from fully open to fully closed. Simple operation is also convenient for long-distance control. The movable sealing ring is easy to disassemble and install, making maintenance and maintenance more convenient and fast. Because of its simple structure and light weight, it can reduce the pressure of the pipeline.According to the experimental data, the threaded ball valve can be used to effectively cut off and connect the medium in the pipeline under the environment of 1-4mpa and the working temperature of -29~180 degrees Celsius, and the medium includes not only water, gas, steam but also oil. , chemicals such as nitric acid and acetic acid.
Flanged ball valves must be maintained during use, and this maintenance is daily work and should be done every day. Only with good maintenance can the service life of the flanged ball valve be extended and let it give full play to its advantages to serve us. So, how to maintain the flanged ball valve?
1. Be sure to check the valve switch indicator and valve number plate to ensure that the identification is clear. If the sign is damaged or falls off, it should be subsidized in time.
2. Check the bolts of each bracket and connection of the flanged ball valve to see if each part is well connected. If there is any looseness, it should be re-tightened.
3. Check the condition of the key parts of the flanged ball valve, including the packing gland, the filling hole, the filling hole nut, the screw plug, the expansion joint, the connection between the valve cover and the valve body, etc., and see if there is any abnormality in these parts. Make sure all components are working properly.
4. In addition to the above daily inspections, a major overhaul should be done every year. Check all aspects of the equipment in detail, so that faults can be eliminated in time to avoid large losses caused by faults.
For example, the leakage of flanged ball valves is a common problem. When the flanged ball valve fails, it must be dealt with as soon as possible, but be careful to find professional maintenance personnel to deal with it. Generally, if the flanged ball valve is purchased from a large manufacturer, the manufacturer can provide after-sales service, so if there is a problem, contact the manufacturer to solve your troubles.
