What device is used to prevent fluid leakage around the shaft in a centrifugal pump?

What device is used to prevent fluid leakage around the shaft in a centrifugal pump?

• A. Flange
• B. Coupling
• C. Seal
• D. Bearing

Answer: (C)

Sealing around the rotating shaft is essential to keep the pumped fluid from escaping along the shaft as it turns. The device that does this is a seal. In centrifugal pumps, a seal creates a barrier between the moving shaft and the stationary pump housing, often using a mechanical seal or packing gland to maintain a tight fit while allowing rotation. This prevents leakage and protects the pump’s efficiency and safety. Flanges are used to join sections of piping and are not designed to seal around a moving shaft. Couplings connect two shafts to transmit torque, not to stop fluid leakage. Bearings support and align the rotating shaft but do not prevent leakage.

Sealing around the rotating shaft is essential to keep the pumped fluid from escaping along the shaft as it turns. The device that does this is a seal. In centrifugal pumps, a seal creates a barrier between the moving shaft and the stationary pump housing, often using a mechanical seal or packing gland to maintain a tight fit while allowing rotation. This prevents leakage and protects the pump’s efficiency and safety.

Flanges are used to join sections of piping and are not designed to seal around a moving shaft. Couplings connect two shafts to transmit torque, not to stop fluid leakage. Bearings support and align the rotating shaft but do not prevent leakage.