How to choose a small submersible pump for agricultural use
September 23 11:29:00, 2025
The agricultural small submersible electric pump is a crucial device for rural households, helping to address water needs for farming, daily use, and irrigation. However, with numerous manufacturers in the market, there's a significant variation in technical capabilities, leading to inconsistent product quality. To ensure you get a reliable and cost-effective pump, consider the following key factors:
First, choose a reputable manufacturer. It's essential to research and select a trusted brand. Water-filled submersible pumps are often recommended due to their reliability. Always check for proper certifications and avoid "three-no" products—those without a manufacturer, production date, or license. These products can lead to serious issues and leave you without support if something goes wrong.
Next, decide between a single-phase or three-phase pump based on your local power supply. If three-phase power is available, it's generally better to go with a three-phase pump. These models are more compact, lighter, and produce less vibration compared to single-phase pumps of similar capacity. This makes them more energy-efficient and longer-lasting.
Determining the right pump parameters is also vital. The flow rate and lift must match your specific needs. Consider the amount of water coming from the source, how much you'll use, and your budget. The head (lift) should be close to the pump’s rated capacity, but not necessarily exact. A deviation of up to 20% is acceptable, as it helps save energy. Choosing a pump with too low a head can result in poor performance, while one with too high a head may cause motor overload and damage over time.
Before purchasing, inspect the pump's quality. Submersible pumps come in different types, such as water-filled, oil-filled, and shielded. Water-filled models are most common. Before use, unscrew the two drain plugs, fill the motor chamber with clean water, and let it sit for about 15 minutes to release any air. Then, refill until it's full and tighten the plugs. After that, test the insulation resistance using a megohmmeter—not a regular multimeter. If the insulation is good, perform a test run in a pool if possible, or run it briefly in the well for no more than 3 seconds.
Finally, buy from an authorized dealer or store approved by the Agricultural Machinery Department. Always ask for a formal invoice to ensure proper warranty and support. Avoid unverified sellers, as they may not provide the necessary assistance if problems arise.
By carefully considering these aspects, you can make an informed decision and invest in a durable, efficient, and safe submersible pump for your agricultural needs.