How to avoid the problem of switch difficulty in the use of large caliber valves?

The reasons for the switch difficulty of large caliber valves in the use process are complex, including the quality problem of the valve itself, the error of the installation link, and the improper use and maintenance. The following are some measures to avoid the difficulty of switching large caliber valves:

Valve selection and installation

Reasonable selection: according to the actual working conditions, including the properties of the medium (such as temperature, pressure, viscosity, corrosion, etc.), flow requirements and the specific situation of the pipeline system, select the appropriate type and specifications of the valve. For example, for high temperature and high pressure medium, high temperature and high pressure resistant valve material and structure should be selected; For high flow applications, ensure that the valve size is large enough to reduce resistance.

Correct INSTALLATION: WHEN installing, it is necessary to ensure that the connection between the valve and the pipeline is firm and concentric, so as to avoid the stress transfer of the pipeline to the valve, resulting in the deformation of the valve and affecting the switch. At the same time, according to the valve installation instructions to operate, to ensure that the installation direction is correct, especially for directional requirements, such as check valves. In addition, necessary support and fixing devices should be set near the valve to reduce the tension and pressure of the pipeline on the valve.

Operation and maintenance

Standard operation: the operator should operate the valve in strict accordance with the operation rules to avoid excessive force or too fast. For large caliber valves driven by electric or pneumatic methods, ensure that the parameters of the driving device are set correctly, such as torque, stroke, etc., to avoid damage to the valve due to insufficient or excessive driving force. When switching the valve, the operation state of the valve should be closely observed. If there is any abnormality, the operation should be stopped immediately and checked.

Regular maintenance: Regular maintenance of the valve is the key to ensure its normal operation. Check the sealing performance of the valve and replace the worn or aged seals in time; Lubricating and maintaining the transmission parts of the valve, such as gears, shafts, bearings, etc., to prevent the switch from being affected by rust and jam; Clean the internal and external impurities and dirt of the valve to prevent them from entering the sealing surface or transmission parts of the valve and causing blockage or wear.

System optimization and monitoring

Optimize the piping system: THE whole piping system is reasonably designed and laid out to reduce unnecessary elbows, tees and other pipe fittings to reduce the pipe resistance, thereby reducing the working pressure of the valve. At the same time, it is necessary to ensure that the slope and support of the pipeline are reasonable to avoid the normal operation of the valve due to water accumulation or deformation of the pipeline.

Real-time monitoring: Install corresponding monitoring equipment, such as pressure sensors, flow sensors, etc., to monitor the working state of the valve in real time. Through the analysis of the monitoring data, the possible problems of the valve can be found in time, such as the pressure difference before and after the valve and the flow change, so as to take measures to deal with in advance and avoid the further deterioration of the problem leading to the difficulty of switching.