Mechanical seal of normal operation and maintenance of the problemF
First, the mechanical seal before the start of preparation and the matters needing attention
1. A comprehensive check that the mechanical seal, and the accessory devices and pipeline installation is complete, meets the technical requirements.
2. Before starting the mechanical seal to static pressure test, check whether there is mechanical seal leakage phenomenon.If the leakage is more, should find out the reason to try to eliminate.If still invalid, should remove check and reinstall.General hydrostatic test pressure in 2 ~ 3 kg/cm2.
3. Aaccording to the pump rotate to turning, check whether the light evenly.Such as turning demanding or not move, should check whether assembly size error, installation is reasonable.
Second, the mechanical seals installation and service
1. Before the start of sealed cavity filled with liquid shall be maintained.For solidification of the medium, the application of steam heat seal chamber to melt medium.Prior to start turning, in order to prevent sudden start caused by the soft ring fracture.
2. For the use of pump WaiFeng oil system of mechanical seal, should start the sealing oil system.Stop after the last stop in sealing system.
Not immediately stop after 3, hot oil pump shut down the oil sealing cavity and end face seal cooling water, should be end face seal oil temperature has dropped below 80 degrees, can stop the cooling water, so as not to damage the sealing parts.
Third, mechanical seal
1. The pump starts if there is a slight leakage phenomenon, should be observed for a period of time.Such as 4 hours of continuous running, still don't reduce the leakage, should stop the pump to check.
2. The operating pressure of the pump should be smooth, the pressure fluctuation is not more than 1 kg/cm2.
3. Pump in operation, should avoid to occur, in order to avoid damage in seal face dry friction and sealing.
4. Seal check regularly.In operation, when the leak than standard, heavy oil is not more than 5 drops per minute, light oil is not more than 10 / points, such as 2-3 days still no improvement, you should stop the pump to check the sealing device.