In recent years, the development of valves has been increasingly rapid, and the types of valves are also diverse. Some valves are classified according to their purpose (such as chemical, petroleum, power plants, etc.), some are classified according to their medium (such as steam, air valves, etc.), some are classified according to their material (such as cast iron valves, cast steel valves, forged steel valves, etc.), some are classified according to their connection form (such as internal thread, flange valves, etc.), and some are classified according to their temperature (such as low-temperature valves, high-temperature valves, etc.). At present, most of the customs in our country are distinguished by pressure and structural types. Namely, according to nominal pressure: ≤ 1.6MPa is a low-pressure valve, 2.5, 4.0, and 6.4 MPa are medium pressure valves, ≥ 10MPa is a high-pressure valve, and over 100MPa is an ultra-high pressure valve.
According to the type of structure, there are mainly: gate valves: (VAG-EKO): Gate valves refer to valves that move the closing element (gate plate) vertically along the axis of the channel. They are mainly used to cut off the medium in pipelines, that is, fully open or fully closed. Generally, gate valves cannot be used to regulate flow. It can be suitable for low temperature and high pressure as well as high temperature and high pressure, and can be made of different materials according to the valve. But gate valves are generally not used in pipelines that transport media such as mud. Plug valves, gate valves, globe valves, ball valves - used to open or close the flow of medium in pipelines. Safety valve - used on boilers, container equipment, and pipelines. When the medium pressure exceeds the specified value, it can automatically eliminate excess medium pressure to ensure safe production and operation. Throttling valve - used to regulate the flow rate of pipeline medium. Check valve (including bottom valve) - used to automatically prevent the backflow of medium in the pipeline. Butterfly valve - used to open or close the medium inside the pipeline. It can also be used for adjustment. Pressure reducing valve - used to automatically reduce the pressure of the medium inside pipelines and equipment. When the medium passes through the gap of the valve disc, resistance is generated, causing pressure loss and achieving the purpose of pressure reduction. Steam trap - used for automatic discharge of condensate on steam pipelines to prevent steam loss or leakage.
Water pump valves have a wide range of applications. For example, in a power plant, valves can control the operation of boilers and steam turbines; In petroleum and chemical production, valves also play a role in controlling the normal operation of all production equipment and processes. This is also the case in other departments. However, pump valves are often overlooked compared to other products. For example, when installing machinery and equipment, people often focus on the main aspects of machinery and equipment, such as compressors, high-pressure vessels, boilers, etc; Some people choose it improperly. These practices will lead to a decrease in overall production efficiency or shutdown, or cause various other accidents to occur. Therefore, the use of valves must comply with strict industry requirements in order to effectively reduce the occurrence of accidents.
