Secondary balance tube?
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Why does a centrifugal compressor have a secondary balance chamber? Are there primary or tertiary balance chambers as well? Why is a pressure difference established between the secondary balance chamber and the primary sealed gas, and what is it mainly used to observe?
The secondary balance tube is a pipe that connects the compressor outlet to the inlet; the sealing gas serves to seal the gas within this secondary balance tube. By monitoring the pressure difference between the primary sealing gas and the pressure in the secondary balance tube, it is ensured that the pressure of the primary gas is sufficient to prevent leaks
The secondary balance tube is mainly provided as a reference for the data in the dry gas seal system
Foreign units generally do not have secondary balance pipes; it is merely the manufacturers of such units who install fewer gauges and control valves in order to reduce costs
That’s absolutely correct – it’s about monitoring the pressure difference in the chamber connected to the seal gas and balance tube, to ensure that the pressure of the seal gas is sufficient to prevent leaks! I’m giving you a like!
It should be the primary balance tube connected to the dry gas seal, right? One end is connected to the inlet of the centrifuge, and the other end is connected to the balance drum ； The function of the secondary balance tube is to balance the pressure before and after the comb seal. The above are merely personal opinions.
A balance tube connects the gas back to a section of the inlet after the outlet comb seal, thereby reducing losses of the leaking medium； The secondary balanced air duct is connected externally at both axial ends in order to use the leakage gas from one section to seal off the leakage gas from another section, thereby further reducing gas loss. It also helps to stabilize the gas flow rate and reduce the pressure before the dry gas seal, thus minimizing the pressure difference with the sealing gas