The seal in a centrifugal pump is used to prevent which of the following?

The seal in a centrifugal pump is used to prevent which of the following?

• A. Fluid From Leaking Around The Shaft
• B. Fluid From Leaking Around The Flange
• C. Air From Leaking Into The Pump
• D. Both A And C

Answer: (A)

A centrifugal pump seal is placed where the rotating shaft passes through the pump housing to keep the pumped liquid from leaking out along that shaft. The seal creates a tight barrier between the moving shaft and the stationary housing, often with stationary and rotating parts and sometimes a barrier or lubricating fluid, so the liquid stays inside the pump and doesn’t seep to the exterior. Leaks around a flange are taken care of by gaskets or flange seals, which seal the joint between flanged components, not the shaft interface. Air entering the pump is addressed by proper priming, venting, and system design, but preventing liquid leakage around the shaft is the seal’s primary job.

A centrifugal pump seal is placed where the rotating shaft passes through the pump housing to keep the pumped liquid from leaking out along that shaft. The seal creates a tight barrier between the moving shaft and the stationary housing, often with stationary and rotating parts and sometimes a barrier or lubricating fluid, so the liquid stays inside the pump and doesn’t seep to the exterior.

Leaks around a flange are taken care of by gaskets or flange seals, which seal the joint between flanged components, not the shaft interface. Air entering the pump is addressed by proper priming, venting, and system design, but preventing liquid leakage around the shaft is the seal’s primary job.