How can dry gas seals for pumps prevent the seal gas from entering the pump and causing gas locking?
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As the title suggests, is the structural design of the dry gas seal medium side for pumps the same as that for compressors? If they are the same, then seal air will enter the pump, potentially causing air locking.
The sealer assembly includes a section to prevent the working medium from leaking out, as well as a chamber where the sealing gas mixes with the leaked working medium before it is discharged. There is a regulator connected to the discharge pipe. These combinations can prevent sealed air flow from entering the pump. Unless it is not in operation, the pressure inside the pump is lower than that of the sealing gas.
For centrifugal pumps with low flow rates, if the PLAN74 scheme is used, this situation needs to be taken into consideration
The pump is equipped with a series-connected dry gas seal, which prevents nitrogen from entering the pump. The first stage uses a mechanical seal, while the second stage utilizes a dry gas seal. In the case of a double-face dry gas seal, a small amount of nitrogen does enter the pump, and this is necessary
A vertical connection line leading to the suction tank can be installed at the inlet!