Application of tandem gas film mechanical seal (1)-

Application of Tandem Gas Film Mechanical Seal (1)

　2018-11-09　　

Application of Tandem Gas Film Mechanical Seal (1):

The sealed medium allows a small amount of leakage into the environment,

For sealing easily vaporized media (hydrocarbons or light hydrocarbons), the tandem seal composed of contact mechanical seal and gas film seal is a very economical sealing device. When the sealed medium allows a small amount of leakage into the atmosphere, the sealing device shown in Figure 4-22 can meet the requirements. 261-75 mechanical seal

Figure 4-22 Tandem air film seal

The gas required for the gas film seal is provided by the gas phase medium leaking from the main seal. When the main seal fails, the gas film seal will be automatically closed and converted to a liquid film seal, so that the amount of liquid leakage can be limited. This gas film seal does not require a buffer gas supply system. When the main seal is damaged in any way, the pressure of the sealed medium will change. At this time, the pressure switch installed in the sealed cavity will detect and trigger the alarm, which can realize safe operation.　　975.html,

Application examples of double-end gas film mechanical seal 　　 Application of tandem gas film mechanical seal (2)