In order to make the mechanical seal have good sealing performance and prolong the service life of the mechanical seal, it is necessary to operate the mechanical seal correctly. Therefore, strict operating specifications and a reasonable maintenance system are powerful measures to ensure the performance and normal operation of the mechanical seal. Below, the editor will introduce how to operate the mechanical seal.
Preparations before starting:
1. Comprehensively check whether the mechanical seals and auxiliary devices, pipelines, valves, instruments, etc. are fully installed. The pipelines must be cleaned to prevent clogging. This is particularly important for new devices. Because impurities often enter the seal from the pipeline to affect the mechanical seal performance, The entire system should be evacuated to prevent the formation of air locks at the height of the seal cavity, which may cause dry friction operation.
2. Perform a static pressure test before starting, and the test pressure is the same as the working pressure; check the mechanical seal itself and related sealing points and joints for leaks. If there is any leakage, try to deal with it
3. According to the rotation of the pump, the steering wheel can only be delivered to use after it meets the requirements.
Start operation:
1. Before the main engine is started, the mechanical seal cavity should be kept full of liquid or sealed medium. If there is a separate auxiliary sealing system, it should be started first, and the cooling water system must also start to circulate (stop at the end when it is stopped). For conveying solidified medium or viscosity For large media, use steam to heat the sealed cavity to melt the media. The vehicle must be cranked before starting to prevent sudden start and cause the soft ring to rupture.
2. Before using the mechanical seal normally, perform a constant cutting operation to observe whether the temperature rise of the sealing part is normal. If there is a light emblem leak, you can run it for a period of time to make the end surface fit more evenly, until the leakage is gradually reduced to normal. If the leakage does not decrease after 1 to 3 hours of operation, stop for inspection.
3. Boosting and heating operation: the mechanical seal that has passed the test of normal pressure operation should be operated in time with the same operating conditions as the pressure increase and temperature increase operation. The pressure increase and the temperature increase can be carried out separately. ) Changes that may occur during the process, such as whether the machine parts collide, whether the end face is disengaged, whether the friction heating is too fast, whether the anti-rotation pin is disengaged or damaged, whether the pressure is stable (required pressure fluctuation is not more than ±0.1MPa) and Whether there is leakage at the sealing ring and the sealing end face, etc., if everything is normal, it can be put into production.
Akman Seals is a professional manufacturer and exporter of mechanical seals. It has rich industry experience and specializes in designing various mechanical seals, such as cartridge mechanical seals, component mechanical seals, etc. Product quality is reliable. If you are interested in mechanical seals, you can pay attention to our website. We will update relevant articles and products from time to time, and provide relevant product information and materials.
