This airless paint sprayer is a battery-powered DC paint sprayer with a brushless motor, built for exterior coating work. Both models share the same 260 bar maximum pressure and electronic pressure control; however, they differ in flow, motor power and power supply.
Airless Paint Sprayer Specifications: DA3.1L38 vs PA3.9L38
| Specification | DA3.1L38 | PA3.9L38 |
|---|---|---|
| Pressure control | Electronic | Electronic |
| Maximum flow | 3.1 L/min (0.82 gpm) | 3.9 L/min (1.03 gpm) |
| Maximum pressure | 260 bar (3,771 psi) | 260 bar (3,771 psi) |
| Motor power | 1,600 W | 2,000 W |
| Motor type | Variable-frequency brushless | Variable-frequency brushless |
| Net weight | 15.7 kg (34.6 lb) | 17.5 kg (38.6 lb) |
| Power supply | 72V / 60V / 48V | 110V / 220V / 72V |
| Packaging size | 46 x 43 x 49.5 cm | 47 x 44 x 56 cm |
The 260 bar figure equals roughly 3,771 psi. That is well above the 1,000 psi threshold used in US construction rules for airless spray gun safety devices, so treat every hose, connection and nozzle as high-pressure equipment.
Where This DC Paint Sprayer Is Used
Typical jobs for this airless paint sprayer include spraying outdoor walls, color steel tiles and steel structure coatings, road line marking and bridge maintenance. Because this DC paint sprayer runs on batteries rather than a fuel engine, the unit can work on sites without a petrol supply and with lower on-site exhaust emissions. For example, crews on remote bridge sites can carry spare battery packs instead of fuel. For surface preparation before coating, see our guide to paint removal and formwork cleaning.
Why a Brushless DC Paint Sprayer Beats a Petrol Engine
First, a brushless motor removes the fuel engine, its exhaust and its routine servicing from the job. In addition, the factory reports a 20% efficiency improvement from the new high-efficiency brushless motor and control system. Also, an electronic fault-code display identifies problems without a separate diagnostic tool, which shortens maintenance time on site. Two common versions with adjacent voltages can be produced, and 48V, 60V and 72V configurations can be customized. However, battery capacity and charging cycles still limit continuous duty, so plan a spare pack for a full shift.
Airless Paint Sprayer Safety at 260 bar
High-pressure fluid can penetrate skin. US regulation 29 CFR 1926.302(b)(8) requires airless spray guns that atomize paint at 1,000 psi or more to have an automatic or visible manual trigger safety device; 1926.302(b)(9) allows a diffuser nut and nozzle tip guard instead. At 3,771 psi this airless paint sprayer sits far above that threshold. Therefore: relieve pressure before clearing a tip, never point the gun at a person, never check for leaks with your hand, and seek emergency medical help for any injection injury, however small the wound appears. Finally, follow the coating supplier’s safety data sheet and the manufacturer’s manual.
Airless Paint Sprayer FAQ
Which model should I choose?
Choose DA3.1L38 for lower flow and a 48V, 60V or 72V DC supply. Choose PA3.9L38 when you need 3.9 L/min, 2,000 W or a 110V/220V supply. Both reach 260 bar.
Can it spray water-based and solvent-based coatings?
The unit is used with common exterior wall and steel coatings. Confirm compatibility, viscosity and thinning requirements with your coating supplier’s safety data sheet before filling the machine.
Can I order a custom voltage?
Yes. 48V, 60V and 72V models can be customized, and a version covering two adjacent voltages can be produced. Tell us your battery system when you enquire.
How do I maintain the sprayer?
Relieve pressure, flush the pump and hose with the recommended cleaner, clean the tip and filter, and read any fault code on the electronic display before restarting. Our quality assurance page describes our inspection process.
Airless Paint Sprayer: Compare and Order
Need help choosing a model, a nozzle set or a voltage? Contact WaterJet with your coating type, daily spray area and available power supply, and we will send a datasheet and quotation. You can also browse the full product catalogue.
