The difference between water filled motor and oil filled motor1、 Core difference1. Different internal media• Water filled motor: The interior is filled with clean water (or rust proof water), and the water directly contacts the winding.Oil filled motor: The interior is filled with insulating oil (tr

Recent copper price trend:The main copper futures contract in Shanghai rose by approximately 10.3% during the year (from January 1st to March 5th), with a year-on-year increase (compared to the same period in 2025) exceeding 30%. The main international copper futures contract rose by approximately 9

The global economy presents a pattern of resilient growth in the United States, moderate recovery in Europe, and differentiation in Asia. The core contradictions are concentrated in three main aspects: the reversals in trade policies, geopolitical conflicts driving up oil prices, and the shift in ce

The copper price has seen a sharp rally, driven by three interlinked factors: persistent supply-side pressure, a new growth engine in demand, and a convergence of financial and policy expectations.Core Driving Factors1. Tightened Supply Frequent production accidents in global copper mines (e.g., Chi

Maintenance of Deep Well Pumps(1) Daily Maintenance (Daily / Weekly)Operation status monitoringKey parameter records: flow rate, pressure (investigate deviations exceeding ±5%, possibly due to impeller wear or pipeline blockage), motor current (shut down if exceeding 10% of rated value);Abnormal jud

Installation of deep well pump:（1） Preparation before installation:Well body and equipment verificationDiameter verification: The actual diameter of the well should be at least 50mm larger than the diameter of the pump body (if a 100mm pump body is selected, the diameter should be ≥ 150mm), and a di

Six core factors contributing to the rise in copper prices today1. Global copper mine supply continues to contract, intensifying mining and metallurgical conflictsGlobal copper mining capacity gap widens:Major copper mine production declines: Codelco in Chile (the world's largest copper mine) will s

Why does a submersible pump not release water when drainingReason:1. Poor connection of water pipe interface: The water pipe connected to the outlet of the submersible pump is not connected properly, or the water pipe is damaged, which can cause the submersible pump to not discharge water when place