Logic Valve Selection and Notice in Practical Application
Logic valves have been widely used in the industrial field from pneumatic control, process control and fluid control. Logic valves are widely used in fluid media because of their simple structure, low leakage, wide pressure range, and large flow control range. Logic valve selection and notice in practical application are as follows.
1. The choice of valve type: ordinary valves are mostly manual valves, electric valves, pneumatic valves, and hydraulic valves, among which electric valves are the most active, making their adjustment and control easier; pneumatic and hydraulic valves are mainly used in remote, heavy industry, and in a very harsh environment.
2. Flow rate selection: In the selection of the logic valve, the flow rate factor should be given special attention. Generally speaking, the valve product flow calculation should involve the diameter, length, geometric shape and other factors of the pipeline diameter and length.
3. Special valve application: When the selection of ordinary valve is not applicable, it is necessary to choose the logic valve, such as the application of three-way valve, to control the directional flow of fluid, or to control the size and direction of the flow, this time logic valve can be selected.
4. The choice of pipe connection type: the logic valve connection type depends on the connection of the pipe, such as thread connection, flange connection, clamp connection, etc. After the connection between the pipes and valves is determined, the selection of various sealing types follows.
5. Valve material selection: when selecting the valves and pipes of various materials, it is necessary to accurately judge the environment and media of the equipment. Relevant materials, such as carbon steel, stainless steel and special alloys, should be selected according to their physical and chemical properties.
6. Control type selection: The logic valve should be selected according to whether the control mode requires manual operation, electrical control, pneumatic control, etc., and the corresponding automatic control system should be adopted.
7. Pressure difference selection: the selection of the pressure difference, the selection of the valves should also pay attention to the selection of the operating pressure and the pressure differential: for example, when the system pressure is 12Mpa, the valve should be selected by 8Mpa.
These are the logic valve selection and notice in practical application. We must take into account the factors such as pipe connection type, flow rate, control type, material and pressure difference when selecting the logic valve. The selection of the logic valve should be based on the actual conditions, the right choice should be made according to the field environment, media and detailed requirements.
