Frequently Asked Questions (FAQ) for Lumina Automatic Spray Gun Fuso Seiki MK-3-0.8X:

1. Product Overview

What is the MK-3-0.8X? The MK-3-0.8X is a high-efficiency Lumina automatic spray gun from Fuso Seiki, designed to deliver precise fluid application at flow rates from 0 to 140 ml/min. It’s ideal for coatings, lubricants, release agents, and food-grade applications requiring fine, uniform atomization.

2. Key Features

High-efficiency air cap with twelve atomizing holes for a fine, micrometer-sized mist

Flow control from 0 up to 140 ml/min via an adjustable needle valve

0.8 mm stainless-steel nozzle and matching needle (SUS303 and SUS440C)

Anodized aluminum body for corrosion resistance and light weight (~100 g)

Three inlet ports (liquid feed, atomizing air, and piston drive air)

Standard Rp 1/8″ threaded connections for easy integration

Narrow, uniform spray width up to 200 mm

3. Specifications

Applying paint or coating on small components

Dispensing lubricants (gears, bearings)

Spraying release agents on dies and molds

Coating food items with melted chocolate or oil

Applying water-based solutions for cooling or cleaning

Dispensing adhesives, fluxes, or anti-corrosion treatments

5. Installation and Setup

How do I install the MK-3-0.8X?

Mount the spray gun on a fixture or robot arm ensuring a stable connection.

Connect compressed air for atomizing and piston drive to their respective Rp 1/8″ ports.

Attach the liquid supply line to the liquid inlet port, ensuring leak-free fittings.

Install a filter-regulator with moisture trap on all air lines to prevent contaminants and water ingress.

How do I adjust air pressure? Use the regulator to set atomizing air between 0.1–0.3 MPa. For finer mist or heavier coatings, adjust within this range and observe spray behavior.

6. Operation

How do I set the flow rate? Rotate the flow control knob (needle valve) clockwise to decrease flow and counterclockwise to increase flow up to 140 ml/min. Initially set at zero, then dial in the desired rate.

How do I control spray pattern width? Adjust the fan pattern knob to spread or focus the spray. Fully open for the maximum 200 mm width or partially close for a narrow line.

How do I stop dripping after spraying? Turn the flow control knob back to zero and ensure the needle is fully seated. This seals off fluid flow and prevents drips.

7. Maintenance and Cleaning

What daily maintenance is required?

Flush the nozzle and internal passages with a compatible solvent after each use

Wipe the exterior with a clean cloth to remove residue

What periodic maintenance is needed?

Disassemble nozzle, needle, and air cap monthly for deep cleaning

Inspect O-rings and seals; replace if worn or damaged

Check for corrosion or abrasion on metal parts

8. Spare Parts and Replacement

When should I replace the nozzle or needle? Replace when you observe:

Irregular spray patterns or large droplets

Increased fluid leakage or drips despite needle adjustment

Visible wear or damage on the orifice edge

Where can I order genuine parts? Contact QTE Technologies (qtetech.com/en). Provide the gun model (MK-3-0.8X) and part codes for nozzle (SUS303) or needle (SUS440C).

9. Troubleshooting

Why is the spray pattern uneven or off-center?

Check for clogged or damaged nozzle or needle

Verify uniform air supply to the atomizing holes

Inspect baffle and air cap for debris

Why is no fluid coming out even when flow is fully open?

Ensure the liquid supply line is not kinked or blocked

Confirm the fluid reservoir has sufficient volume

Test fluid passage by loosening the nozzle to rule out internal blockage

Why is the fluid mist containing air bubbles?

Check for leaks or air ingress at the suction line or fittings

Position the fluid container below the spray gun inlet to maintain positive pressure

10. Ordering, Lead Times & Warranty

How do I order the MK-3-0.8X? Contact QTE Technologies (qtetech.com/en) with the model number and required accessories (mounting bracket, filters, fittings).

What is the typical lead time? Expect 30 - 45 business days from order confirmation, depending on stock and shipping.

What warranty covers the spray gun? Please contact QTE Technologies (qtetech.com/en).

11. Additional Tips

Always use clean, filtered compressed air (0.01 μm filter) to prevent clogging.

Match fluid viscosity to nozzle size for consistent atomization.

Use anti-drip solvents or buffer solvents if switching fluid types frequently.

For robotics or automated lines, incorporate quick-disconnect fittings for rapid maintenance.