Hydrogen feed pump balance line pressure
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The hydrogenation reaction feed pump has a balance line pressure of 0.3 MPa. Why is this pressure so low? I think it should be slightly lower than the pressure at the outlet of the feed pump. Why is the pressure so low?
The pressure in the balance tube is only slightly higher than the inlet pressure
But the pressure in the balance tube of the feed pump in my workshop is still roughly the same as the outlet pressure
If the pressure in the balance line of the feed pump is similar to the outlet pressure, it means that the leakage is too high and has affected the pump’s efficiency.
The pressure in the balance tube is slightly higher than the inlet pressure, which helps to maintain the pressure in the sealing chamber, thereby extending the lifespan of the seal and reducing the risks associated with seal leakage. If the pressure is too high, it may be due to a blocked balance tube or severe wear of the balance sleeve; it’s advisable to check these aspects.
The pressure in the balance tube is slightly higher than the inlet pressure, so your inlet pressure must be lower than 0.3. The balance tube is used to balance the axial force by connecting the pressure behind the balance disc to the inlet. If the pressure in the balance tube is too high, then the axial forces cannot be balanced, which leads to scraping between the balance discs