The key points of multi-stage pump motor and electrical connection involve safety preparation, motor and power matching, motor and pump body connection, electrical connection operation, subsequent inspection and testing, and other precautions. During the operation, relevant safety regulations and operating procedures should be strictly observed to ensure the safety and reliability of the connection process.

When selecting a self-priming pump coupling, you need to consider multiple factors, including coupling type, size and connection, special needs, etc. By comprehensively considering these factors and following the correct selection and use steps, you can ensure the stable operation of the self-priming pump and improve its overall performance.