MASPRA EP45: How to set up your Airless pump correctly, spray cleanly & finish faster
In this guide, you will find practical reference values for pressure, startup & cleaning routines, as well as typical error patterns – ensuring the EP45 atomizes paint, varnish, and filler consistently while reducing downtime.
Quick Overview
- Reference values for working pressure per material (Paint/Varnish/Filler)
- Pro Workflow: From priming to the perfect spray pattern
- Troubleshooting & maintenance (Filters, hose, gun, nozzle)
Product Overview: Variants & Applications (EP45 / SprayPack)
The EP45 is available as a base unit on a cart and as a SprayPack (ready-to-spray set). For long hose distances and high-viscosity materials, a stable material flow is crucial; the right hose setup reduces pressure loss. (Values depend on configuration.)
| Product | Version | Suction System / Accessories | Equipment | Core Technical Data |
|
EP45 on Cart | Direct Suction | Base unit without hose and gun set |
Max. Nozzle Size: 0.045" Flow Rate: 8.0 l/min Weight: approx. 62 kg |
|
SprayPack Airless | Direct Suction |
2× Hose 1/2" – 15 m – 1/2" NPS Hose Whip 3/8" – 3.5 m Gun 250 bar – 5 mm Ball Nozzle & Holder: MT-U – 531 & 541 Nozzle and Brush Cleaning |
Max. Nozzle Size: 0.045" Flow Rate: 8.0 l/min Weight: approx. 67 kg |
|
Hose Reel | For EP45 | For 1/2" High-Pressure Hoses | Organization & Occupational Safety |
|
Bulk Container | 60 Liters | Includes bag press & lid | For Paint & Filler |
Note: Core technical data in the table depends on configuration/version and should be understood as reference values.
KPI #1 (Practice)
20–25 cm Spray Distance
Maintain a constant distance and guide the gun parallel – this stabilizes the spray pattern.
KPI #2 (Finish)
~30% Overlap
Slightly overlap each pass – this significantly reduces clouds, stripes, and hard edges.
KPI #3 (Guidelines)
100–220 bar per material
Work with the minimum possible pressure that still atomizes cleanly (see reference values below).
CTA: Select EP45 directly (max. 2 buttons)
If you already know which equipment you need, here are the direct links to the product pages:
Recommended Basic Settings (Reference values from manual)
Values depend heavily on material, nozzle, temperature, and viscosity. Use these figures as a starting point – then adjust via spray pattern & minimum pressure.
Reference values are based on the Quick Start overview in the manual; material data sheets & spray tests are decisive.
Pro Workflow (5–7 steps)
- Prepare Material: Stir well, remove dried residue, thin if necessary according to manufacturer's instructions, and additionally fine-filter (reduces clogging & nozzle damage).
- Setup & Safety: Unroll hose completely (no kinks), check all connections, ensure correct grounding, lock the gun when not spraying.
- Priming (PRIME): Set pressure to minimum, Bypass/Relief to PRIME, turn on device and slowly increase pressure until material flows cleanly through the return line.
- Switch to SPRAY: Turn valve to SPRAY, trigger gun into a collection container until material exits without interruption.
- Adjust Pressure: Increase pressure only until the spray pattern is flawless – then turn back slightly (Minimum Pressure Rule).
- Spraying: 20–25 cm distance, gun parallel to the surface, move arm evenly, pull trigger only while moving and release before ending movement; overlap passes by approx. 30%.
- Breaks: Lower pressure, open PRIME, turn off device; if a clogged nozzle/hose is suspected: check pressure gauge and safely relieve pressure.
Troubleshooting (4 typical problems + solutions)
1) Device does not start
- Check power supply (mains/socket/RCD) and check switch position.
- Do not leave the pressure regulator "stuck" at minimum – increase slightly if necessary.
2) Pump does not suck in material
- Relief/Bypass must be set to PRIME (not SPRAY) for suction.
- Keep suction filter below material level; clean/replace filter and check connections for air leaks.
3) Material flows, but pressure does not build up
- Check nozzle: heavily worn/too large → replace; increase pressure step by step.
- Clean filters (suction/unit/gun filter); if material flows back through return line during SPRAY: have relief valve cleaned/replaced.
4) Poor spray pattern / Stripes / "Edges"
- Pressure too low or viscosity too high → increase pressure moderately or adjust material according to manufacturer.
- In case of pulsation: lower pressure if necessary, use only suitable (grounded) high-pressure hoses, and check nozzle for wear.
Maintenance & Cleaning (5 points, compact)
- Clean after every use: Do not let anything dry – this is the most common cause of malfunctions.
- Filter Routine: Keep suction filter clean; clean unit/HP filters regularly if the spray pattern degrades or the nozzle clogs frequently.
- Gun & Nozzle Care: Soak nozzle in suitable cleaning solution, clean gently (no sharp metal tools).
- Hose Check: Check for abrasions/leaks before use; keep bend radius small (approx. 20 cm) and do not drive over it.
- Service Interval: Regular inspection (e.g., filters/hoses/plugs); do not use high-pressure hoses "forever" – age increases risk.
FAQ (Practice-relevant)
What is the ideal spray distance?
As a guideline, 20–25 cm. More important than "exact" is: remaining constant and guiding parallel.
Why do I have stripes/edges in the spray pattern?
Usually, pressure is too low or material is too thick. Increase pressure in small steps or adjust material according to data sheet.
Do I need to filter material additionally if I already have filters in the system?
Yes, recommended: Additional fine filtering reduces foreign particles, clogging, and unnecessary wear (especially with lacquers/paints).
How do I take a safe work break?
Lower pressure, open PRIME, turn off device, and relieve residual pressure via the gun into the bucket. Secure the gun.
What is the most common reason for "no pressure" despite material flow?
Nozzle worn/too large, filter clogged, or relief valve dirty. Check nozzle/filter first, then the valve.
Conclusion
If you consistently work with clean material, a clean filter setup, and the Minimum Pressure Rule on the EP45, you will achieve a steady spray pattern faster – while simultaneously reducing overspray, downtime, and wear. You can find direct product links above for the appropriate equipment (Base Unit or SprayPack).
