Functions Of Mechanical Seal System

(1) Flushing function

Flushing is the most basic function of mechanical seal system, but also the most common way of mechanical seal system, direct injection of liquid to the high-pressure side of single or double end face seal. General mechanical seals should be washed, especially for light hydrocarbon pump mechanical seals. When washing to achieve isolation medium, cooling and improve the purpose of lubrication. The purpose of isolating the medium can be achieved by circulating and flushing the liquid compatible with the medium in the sealed cavity.

(2) the function of adjusting and controlling the sealing working temperature

Mechanical seal system has the function of tempering and controlling the temperature of the working environment of mechanical seal itself. Temperature regulation and control include cooling and insulation. Saturated vapor pressure high medium, in the sealing cavity absorption of mechanical seal heat and end friction heat, causing temperature rise; If the cooling is not carried out in time, it is likely to lead to the vaporization of the medium on the end face, so that the lubrication of the end face deteriorates, leading to the failure of the seal. And for easy crystallization, easy solidification of the medium, it is necessary to take heat preservation measures, so that the medium does not crystallize, do not solidify.

(3) the function of adjusting and controlling the sealing working pressure

The mechanical seal system also has the function of adjusting and controlling the seal working pressure. For ordinary double-end mechanical seals, the pressure of the isolating fluid in the sealing chamber needs to be slightly higher than that of the sealed medium, while in the series mechanical seals with step-step-down, the pressure difference of the sealing fluid between stages needs to be maintained.

(4) Impurity removal and filtering function

The harm of fine solid particles, dirt and other impurities in the sealing fluid to mechanical seal is very serious, may lead to serious wear of the seal end face, may also block the cold sealing system pipeline. The sealing system has the function of removing impurities and maintaining liquid cleaning. When the density of impurities is lower than the density of the liquid medium, the impurities can be removed by a filter; When the density of impurities is greater than the density of the liquid medium, the impurities can be removed by a rotary liquid separator or mesh filter.

(5) Fluid replacement function

It is difficult to directly seal gas-phase medium, which is warm, toxic, valuable, easy to vaporize, easy to crystallize and liquid medium containing solid particles. The sealing medium can be replaced by double-end mechanical seal with the help of mechanical seal system, and the medium which is difficult to directly seal can be transformed into a clean sealing medium with good sealing lubrication performance.

In addition to the above functions, the sealing system also has the functions of washing, diluting and transferring trace media that are normally leaking and harmful to health or the environment.