Table of Contents
- 1 What is the correct starting procedure for centrifugal pump?
- 2 What should be done before stopping an operating pump?
- 3 What is priming in pump?
- 4 On which pump safety is required?
- 5 How do you start a centrifugal pump?
- 6 When do you start a pump against a closed valve?
- 7 What precautions should be taken before centrifugal pump start-up?
What is the correct starting procedure for centrifugal pump?
Centrifugal pump start up procedure
- Open the suction valve.
- Open any recirculation or cooling lines.
- Fully close or partially open the discharge valve, depending on system conditions.
- Start the driver.
- Slowly open the discharge valve until the pump reaches the desired flow.
What should be done before stopping an operating pump?
For low to medium specific speed pumps (below values of approximately 5,000), close the discharge valve prior to stopping the pump. This takes the load off the motor and, if any check valves leak, it may prevent reverse flow through the pump. Next, shut down the driver and leave the suction valve open.
What to check before starting a pump?
The points to be checked before starting the pump are : Now open the suction valve and start the pump, check the current, pressure, any visible leakages, unusual sound. If all looks ok, open discharge valve fully and continue the running of pump.
What is priming in pump?
What is pump priming? Priming simply means preparing or getting something ready for operation. For a centrifugal pump to work properly, you need to fill it up with water. The pump will resume operation once the air is removed.
On which pump safety is required?
It’s important to ensure pumps do not overheat; to avoid the problem, always leave the suction and discharge line open during operations. However, if overheating occurs, stop the pump immediately and allow it to cool to the air temperature. Then vent the pump at the drain plug, slowly and cautiously, before restarting.
What is priming of pump?
Priming is the process of removing air from the pump and suction line to permit atmospheric pressure and flooding pressure to cause liquid to flow into the pump. Without priming, pumps will cease to function and break down.
How do you start a centrifugal pump?
Centrifugal pump start up procedure. 1. Open the suction valve. 2. Open any recirculation or cooling lines. 3. Fully close or partially open the discharge valve, depending on system conditions. 4. Start the driver.
When do you start a pump against a closed valve?
However, if the pressure in the system beyond the discharge valve needs to be maintained at an operating pressure, then the pump needs to be started against a closed valve, with the valve being slowly opened as the pump comes up to speed.
What should I do if my pump fails to start up?
Flush and clean the system thoroughly to remove dirt or debris in the pipe system in order to prevent failure at initial pump start-up. Bring variable-speed drivers (if installed) to the rated speed as quickly as possible.
What precautions should be taken before centrifugal pump start-up?
These precautions must be followed before centrifugal pump start-up:- Do not operate the centrifugal pump below the minimum rated flows or with the suction or discharge valves closed. Always disconnect and lock out power to the driver before you perform any installation or maintenance tasks.