Precautions for Starting and Stopping Magnetic Drive Pumps

The correct operation of starting and stopping magnetic drive pumps is crucial, as it directly affects the pump’s service life and operational safety. The core principle is to prevent dry friction and avoid overload, while strictly following the “preparation first, operation second” process.

1. Precautions for Starting Magnetic Drive Pumps

The pre-start inspection and operation sequence are critical, as they directly determine the success of the start-up and the safety of the equipment.

Medium & Air Release Check
Ensure the pump is fully filled with the conveying medium; dry running is strictly prohibited. Open the exhaust valve on the top of the pump body to completely release air inside the pump, preventing start-up failure or pump vibration caused by “air binding” (a phenomenon where air blocks the flow path).
Motor & Rotation Direction Verification
Check that the motor wiring is correct and the grounding is reliable. For the first start-up or after maintenance, jog the motor (briefly energize it) to observe if the impeller rotation direction matches the arrow mark on the pump body. Reverse rotation will cause magnetic coupling failure or component damage.
Valve Operation Sequence
First close the outlet valve, then start the motor. After the motor runs stably, slowly open the outlet valve and gradually adjust it to the required flow rate. Avoid direct full-load start-up, as this may cause motor overload.

2. Precautions for Stopping Magnetic Drive Pumps

Shutdown operations should avoid medium backflow and pump body damage, with a focus on the valve closing sequence and subsequent maintenance.

Valve & Motor Operation
First slowly close the outlet valve, then cut off the motor power supply. This prevents reverse medium impact on the impeller and magnetic coupling caused by sudden shutdown.
Medium & Flushing Treatment
If conveying crystallizable, solidifiable, or corrosive media, flush the pump body promptly with clean water or a compatible solvent after shutdown. This removes residual media and prevents component blockage or corrosion.
Equipment Condition Inspection
After shutdown, check the pump body for leakage, abnormal noise, or overheating. Record operating parameters (such as current and temperature) to provide references for subsequent maintenance.

INQUIRY NOW

Product

XJR News