The liquid film between the end face of the mechanical seal is used to lubricate the end face and take away part of the friction heat, according to the working principle, the leakage is absolute, and the trace amount of the leakage is normal. For volatile liquid, due to the leakage of the micro fluid rapid evaporation, the normal eye is invisible to the naked eye; for the liquid is not volatile, visible drip leakage.
For industrial installations, the use of a single sealed pump, often operating workers inspection, the leakage of the seal with the naked eye. For long transmission pipeline with the oil pump, you can collect the seal leakage of liquid, leading to a set of tanks, the tank set up a high level alarm, used to monitor the leakage of the seal.
