Suggestions on safe use of multistage pumps
The key points for safe use of multistage pumps involve multiple aspects to ensure the normal operation of the equipment and the safety of personnel. The following are some key points for safe use:
1. Purchase and preparation
Select the right model: When purchasing a multistage pump, pay attention to its model, flow rate and head to ensure that the selected specifications match the actual application requirements. Inappropriate specifications may lead to insufficient water output and affect the efficiency of the unit.
Understand the direction of the motor: Some types of multistage pumps can output water when rotating forward and reverse, but the water output is small and the current is large when reversing, and the motor winding may be damaged. Therefore, the direction of rotation of the motor should be clear.
Safety protection: To prevent electric shock accidents caused by leakage, a leakage protection switch should be installed.
2. Installation precautions
Solid foundation: The multistage pump should be installed on a solid foundation and fixed with bolts to ensure that the equipment is stable and does not shake.
Cable protection: The cable should be overhead to avoid the power cord being too long and stressed to prevent breakage. At the same time, do not subject the cable to stress when the unit is launched.
Pipeline connection: The inlet and outlet pipelines should be firmly connected without leakage, and measures should be taken to support the pipeline to prevent excessive load.
Motor installation: When installing the motor, ensure that the direction is correct and the ventilation and heat dissipation effect is good to avoid overheating of the motor.
3. Operation specifications
Inspection before starting:
Check whether the inlet and outlet valves of the pump are closed and whether the pressure gauge is zeroed.
Check whether the foundation of the pump is firm and whether the anchor bolts are loose.
Check whether the vibration and noise of the pump are normal, and whether there is enough cooling water supply.
Turn the rotor to check its flexibility; check whether the direction of the motor is consistent with the direction of the pump.
Start and run:
After confirming that everything is correct, start the pump and observe whether the inlet and outlet pressure, flow, current and other parameters are normal.
Regularly check the operation of the pump, including bearings, seals, cooling, etc., as well as the vibration, noise and temperature of the pump.
Avoid starting the machine at low pressure. The power supply voltage should not differ too much from the rated voltage to prevent the motor from overheating or speed reduction.
Shutdown operation:
Before shutting down, the inlet and outlet valves should be closed first. Pay attention to closing the outlet valve first and then the inlet valve to prevent water backflow.
After the pump stops running completely, cut off the power supply.
4. Maintenance
Regular inspection: Regularly check the seals, bearings, filters and inlet and outlet pipes of the multistage pump. If they are worn or damaged, they should be replaced in time.
Cleaning and maintenance: Clean the debris and filter in the pump housing to keep the pump unobstructed.
Electrical inspection: Regularly check the power supply line and wiring terminals to ensure their safety and reliability.
5. Precautions
Avoid overload: Do not let the multistage pump operate overloaded for a long time, and do not pump water with a large amount of sand to prevent the motor from overheating and burning.
Personal protection: When operating a multistage pump, wear appropriate personal protective equipment, such as gloves, goggles, etc.
Comply with regulations: Strictly operate in accordance with the instruction manual and safety operating procedures of the multistage pump, and do not change or ignore any safety steps without authorization.
