Specifications of the DC 18V Mini Water Pump
Flow, head, current and size differ from model to model, so we give them as a pump curve and a drawing for the model you are considering, not as one number for the whole range.
|
Item |
What you get |
|
Power |
18V DC, direct connection to common 18V lithium tool batteries |
|
Pump type |
Centrifugal; needs liquid for lubrication and cooling |
|
Motor |
Brushless or brushed |
|
Flow and head |
Pump curve per model, measured with clean water at controlled voltage |
|
Liquid |
Clean or lightly filtered water within the rated temperature range |
|
Installation |
Can be fully submerged; flexible mounting orientation while the inlet stays flooded |
|
Wiring |
Two-wire and polarity sensitive; PWM speed control, on/off switching or custom connectors available |
|
Protection |
Dry-run protection available as an option |
|
Documents |
2D drawings, STEP models, material certificates and test reports on request |
Water Pumps Fail In The Field
Dry running is a frequent cause of early failures. The pump relies on water for lubrication and cooling, so a dry run or an air lock heats it up quickly and can damage the impeller or shaft. Keep the inlet flooded or prime the pump before starting, and keep the suction line short and airtight. For critical equipment we can add dry-run protection based on current or temperature sensing.
Sprayers are the usual victims: once the tank empties, the pump keeps running. Protect against it in the design, not in the user manual.
A clogged inlet is one of the most common field failures we see. Fit a strainer whose mesh suits your debris. The pump works best on clean or lightly filtered water, so keep it away from abrasive slurry, chemicals outside the material limits and water hotter than the rated range.
Heat is the slower killer. Continuous running is fine when the pump is submerged or the liquid carries the heat away. Running it with the outlet blocked (dead-head), or in a hot enclosure, wears it out faster. Stay inside the duty limits we give for each model and leave room for ventilation or liquid cooling.
Testing before shipment
Every DC 18V mini water pump gets a 100% flow and current test and a seal check, and sample units go through durability runs. Material certificates and test reports are available for your OEM files.
Installation notes
Orientation is flexible as long as the inlet stays flooded. Soft rubber mounts or grommets cut vibration and keep the finished product quieter.
The standard connection is two wires, and polarity matters. Check it before you power up, because a reversed connection can damage brushless electronics. We can supply PWM speed control, a plain on/off switch or custom connectors.
The pump can be fully submerged. The housing and seals are chosen for water service; for mild chemicals other materials are available, but please check compatibility with us before using anything other than clean water.
2D drawings and STEP models are available on request, so your engineers can check fit before ordering samples.
Products Description
A DC 18V mini water pump suits hand-held and backpack sprayers and dust-control units: the battery is already in the tool kit and the pump is small. In cooling loops for electronics or small process equipment, it works when the flow matches the heat exchanger and the system head stays in the efficient part of the curve. Portable micro-irrigation and misting units benefit from the compact body; filter the water and keep tubing runs short to limit pressure loss.
Where this pump is not a good fit
Thick or sticky liquids, abrasive slurry, aggressive chemicals outside the material limits and water hotter than the rated range are outside what this pump is built for. Long dry runs without protection will also shorten its life. If your application is near any of these limits, send us the details before you order samples.
OEM customization
|
What can change |
Options |
|
Voltage |
Modified voltage range |
|
Water connection |
Barb size |
|
Electrical |
Cable length, connectors, PWM speed control, on/off switching |
|
Protection |
Dry-run protection |
|
Marking |
Your branding |
Minimum order quantities depend on how much is customized, so tell us your expected volume when you ask for a quote.
When you ask for a quote, please include:
Target flow and head
Duty cycle: run time per cycle and cycles per day
Fluid and its temperature
Space limits and battery brand
FAQ
Q: What are the maximum flow and head of the DC 18V mini water pump?
A: Performance follows the pump curve of the model you choose, measured under standard test conditions. Installed flow depends on the total resistance of your system, so send us your tubing length and fittings and we will check the working point.
Q: Can this pump run directly from an 18V lithium battery?
A: Yes. It is designed for direct connection to common 18V lithium tool batteries. We recommend low-voltage and over-current protection on the battery side.
Q: Can it run dry or run continuously?
A: The standard version should not run dry; dry-run protection is optional. Continuous running is supported when the pump is submerged or cooled by the liquid, within the duty limits we give for each model.
Q: Can it pump hot water or liquids other than clean water?
A: It is rated for clean or lightly filtered water within the specified temperature range. For other liquids, check material compatibility with us first.
Q: How long does it last?
A: Brushless models are built for long service under proper conditions. Real life depends on duty cycle, water cleanliness and operating temperature.
Q: Can you customize the voltage, fittings or cable?
A: Yes. The OEM section above lists what can be changed; send your requirements and we will reply with a configuration and quote.
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