The principle of the air film mechanical seal air supply system for pumps-

The principle of the gas supply system of the gas film mechanical seal for the pump
　2018-10-19　　
Principle of air supply system with air film mechanical seal for pump:
In order to facilitate the understanding of the working principle of the gas supply system, start with a few examples. Figure 4-15 is a physical diagram of the gas supply system and its process of the pump with a film mechanical seal. 221 mechanical seal
As shown in the figure, the blocking gas (or buffer gas) unit and filter unit are essential for mechanical seals. These units include all the components required for seal monitoring and control.
Figure 4~15 Gas film seal gas auxiliary system for pump and its physical diagram

The gas from the nitrogen source must be filtered by a filter, the purpose is to prevent the particles in the gas from entering the measuring instrument or the gap of the sealed end face. The filter unit is nominally 1um expensive, that is, the maximum allowable particle size is smaller than the gap between the sealed end faces. Simple filters are used as standards, and reversible double filters may also have higher requirements. The pressure reducing valve can adjust the pressure so that the gas pressure in the gas supply system is higher than the required gas pressure.
The obstruction (buffer) gas consumption can be read from the flow meter. In the event of an accident, that is, the sealing gas supply fails, the check valve can prevent the product (process medium) from flowing into the gas supply system.　　968.html,

Air supply system with film mechanical seal for pump 　　 Air supply system with film mechanical seal for pump