Changing the Pump of a Steam Plant

Aug 03, 2023, 13:11pm

The steam generator pump circulates the water within the device: from the reservoir to the resistance where it is heated, then expelled through the soleplate of the iron.

Replace the steam generator pump if:

  • the steam generator no longer produces steam;
  • the boiler of the steam plant no longer fills;
  • the pump no longer makes any noise on start-up.

The pump is located inside the steam generator casing, in the form of a small box.

Steam plants play a vital role in many industrial processes, and their efficiency is paramount to productivity. A critical component of a steam plant is its pump, which facilitates the movement of water or steam throughout the system. Occasionally, these pumps may fail or degrade due to wear and tear, demanding a replacement. This article will walk you through a step-by-step process to safely and effectively change a steam plant pump.

Changing the Pump of a Steam Plant

1. Safety First

Before you start, ensure you have the right safety equipment. You will need safety glasses, gloves, and a hard hat. Always follow safety regulations when dealing with heavy machinery, and isolate the pump from any power supply to prevent accidental start-ups.

2. System Depressurization and Drainage

Next, you’ll need to depressurize the system to safely remove the pump. Close the relevant valves to isolate the pump from the rest of the steam plant. Then, slowly open the pump’s drainage valve to depressurize the pump and drain any residual water or steam. Be cautious, as steam can be very hot and may cause burns.

3. Disconnecting the Pump

Once the system is safely depressurized, you can begin to disconnect the pump. First, remove any electrical connections, taking care to remember or mark the connection points for reassembly. Then, disconnect the pump from the piping system. This process can vary depending on the specific pump design, but it generally involves removing bolts and carefully pulling the pump away from its connections.

4. Removal of the Pump

With the pump disconnected, you can now remove it from the system. Use a suitable lifting apparatus if necessary, as pumps can be heavy and awkward to handle. Always follow proper lifting techniques to prevent injuries.

5. Installation of the New Pump

Now it’s time to install the new pump. Position the pump correctly and reconnect it to the piping system, securing it with the necessary bolts. Make sure all connections are tight and secure to prevent leaks.

Changing the Pump of a Steam Plant

6. Reconnecting Electrical Connections

After the new pump is securely installed, reconnect the electrical connections. Follow the marking or photos you took during disconnection to ensure that all electrical connections are correctly made.

7. System Refill and Repressurization

With the new pump installed and connected, you can begin to refill and repressurize the system. Close the pump’s drain valve and slowly open the isolating valves to refill the pump. Monitor the pressure gauge closely to ensure the system is pressurizing correctly.

8. System Check and Start-Up

Finally, it’s time to start up the system and check for proper operation. Carefully turn on the pump and observe its operation. Check for any signs of leaks or irregular sounds. If everything runs smoothly, the pump replacement is successful.


Changing a pump in a steam plant can seem daunting, but with careful planning, the right tools, and adherence to safety protocols, it’s an achievable task. Keep in mind that while these steps provide a general guide, different steam plants and pump designs may require specific procedures. Always refer to your pump and steam plant manuals for precise instructions. When in doubt, consult a professional to avoid potential damage or risk.