Precautions For Using Stainless Steel High-temperature Submersible Pumps

Jan 14, 2026

Nowadays, stainless steel high-temperature resistant submersible pumps are widely used in agriculture. They can not only improve agricultural work efficiency, but also reduce labor consumption. For many large-scale farmers, they are a very economical product. The selection of stainless steel high-temperature resistant submersible pumps is very important before use. The pump model should be selected based on the actual situation of the water source, working time, and pump water volume requirements. Below are some precautions for using stainless steel high-temperature submersible pumps:

 

1. It is not advisable to start frequently
Stainless steel high-temperature resistant submersible pumps should not be started frequently because there will be backflow when the pump is stopped, and starting immediately will cause the motor load to start.
2. It is not advisable to turn on the machine due to abnormal voltage
When the voltage is too high or too low, it will cause the pump to overheat, thereby shortening its service life and even burning it out.
3. Stop the machine immediately in case of any abnormalities
When using a stainless steel high-temperature resistant submersible pump, it is necessary to have someone watch over it. If there is any abnormality, stop immediately and check if the pump is not running.
4. Regularly turn on the device
When the pump is not in use for a long time, we also need to regularly turn it on to prevent rusting, usually once a week.

 

Stainless steel submersible pumps cannot be used in this way. Remember the following eight taboos

 

One thing to avoid is that stainless steel submersible pumps are not grounded

The adoption of protective grounding for stainless steel submersible pumps is a mandatory national standard requirement. Only by adopting protective grounding can personal safety be ensured during use. If there is no protective grounding, once the casing leaks electricity, it will cause the water at the outlet of the stainless steel submersible pump and the surface of the pumped water to become electrified, endangering human and animal safety, and wasting a large amount of electrical energy. If the metal casing of the submersible pump is connected to a grounding body (with a grounding resistance not exceeding 4 Ω) that meets national standards, when the stainless steel submersible pump casing leaks electricity, the current flows through the submersible pump metal casing, protective grounding wire, grounding body, earth, working grounding wire of the transformer, and power supply to form a closed circuit. When the leakage current is too large, especially when the live wire touches the casing, the protection device of the submersible pump can be activated (fuse blown or air switch tripped), cutting off the power supply of the leakage submersible pump.

Two taboos: stainless steel submersible pumps should not be equipped with leakage protectors

Stainless steel submersible pumps work in water and are prone to electrical leakage, causing energy loss and even electric shock accidents. If a leakage protector is installed, as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not exceeding 30 mA), the leakage protector will cut off the power supply of the submersible pump.

Three taboos: start the stainless steel submersible pump when the power voltage is abnormal

Both high and low voltage can cause excessive temperature rise in stainless steel submersible pumps, shorten their service life, and even burn them out. Due to the comparison of low-voltage power supply lines in rural areas
Long, low voltage at the end of the line and high voltage at the beginning are common occurrences. Therefore, during the use of submersible pumps, the operator must observe the power supply voltage value at all times. If it is below 10% of the rated voltage, above 10% of the rated voltage, or the current is greater than 20% of the rated current of the submersible pump, the machine should be stopped immediately and the power supply voltage should be avoided from starting up when it is abnormal.

 

 

Four taboos: stainless steel submersible pump motor rotating in the opposite direction

Nowadays, there are many types of stainless steel submersible pumps that can produce water in both forward and reverse directions. However, during reverse rotation, the water output is small and the current is high. Prolonged reverse rotation can damage the motor winding. Therefore, the stainless steel submersible pump electric pump should be connected to the power supply before entering the water to check if the rotation direction is correct. If the impeller of the three-phase submersible pump reverses, the machine should be stopped immediately and the wiring of any two phases of the three-phase core wires in the cable should be replaced.

Five taboos： stainless steel submersible pumps: long-term overload operation

To avoid long-term overload operation of stainless steel submersible pumps, do not use low head pumps for high head operation, do not pump water with high sediment content (heavy mud), and always observe whether the current value is within the specified range. If excessive current is found, the machine should be stopped for inspection. In addition, submersible pumps use water as the cooling source, so the dehydration operation time of submersible pumps should not be too long.

Six taboos: frequent switching of stainless steel submersible pumps

Stainless steel submersible pumps should not be started too frequently because backflow occurs when the submersible pump stops running. If the pump is started immediately, it will cause the motor load to start, resulting in excessive starting current. Therefore, after stopping the machine, it is necessary to wait for the water stored in the pipe to flow back before restarting, usually with an interval of about 5 minutes.

Seven taboos for using stainless steel submersible pumps in muddy environments

If the stainless steel submersible pump sinks into the mud during use, it will cause poor heat dissipation and burn out the motor winding. Therefore, submersible pumps must not be used in muddy environments. To prevent the submersible pump from sinking into the mud, the mud in its working environment should be removed before the submersible pump is launched. If possible, a fence cover should be used to cover the submersible pump to prevent waste from blocking the water inlet fence, causing the motor to heat up and the water to flow out poorly.

 

 

Eight taboos: Stainless steel submersible pumps should be left in water for a long time after being stopped, regardless of whether they are used or not

If the stainless steel submersible pump is not used continuously after being lowered into the well, it will rust over time, causing it to fail to start. Therefore, unused submersible pumps should not be left in water and should be turned on once a week for 5-10 minutes. When not in use for a long time, if it is not immersed in water for a long time, it should be placed in clean water and powered on for a few minutes to clean the mud inside and outside the pump. Then, the water surface should be wiped dry for a major inspection. All components should be disassembled for maintenance, cleaning, rust removal, and cleaning. Fragile parts should be replaced and reassembled, painted for rust prevention, and placed in a dry, non corrosive gas warehouse.