In centrifugal natural gas blowers of gas pumping units of the oil-trunk pipelines, underground storehouses of gas, turbo-expander installations and compressors.
Modifications
Single
Double
Combined. The basic face seals, auxiliary slotted or labyrinth. Off-line buffer fluid circulating system is employed.
Features
Buffer fluid is oil turbine;
Cooling is compulsory circulation of valve liquids through the chamber of seal with the consequent choking.