GRAVITY GUN W 400

What is the Iwata GRAVITY GUN W-400 and why choose it

The Iwata GRAVITY GUN W-400 is a professional gravity-feed spray gun from the W-400 Classic Plus Series, designed for high quality car refinish applications and general spray painting. With a lightweight 380 g body, precise needle–nozzle combinations and controlled atomizing air pressure, it offers consistent, even spray patterns for demanding refinishing work. The gun is engineered to meet ATEX 2014/34/EU requirements for use in Zones 1 and 2, making it suitable for environments where flammable vapours may be present.

Main features

• Gravity-feed design: Cup mounted on top of the gun for efficient material use and stable paint flow.
• Wide nozzle range: Fluid nozzle sizes from 0.8 mm up to 2.5 mm (depending on model variant) to cover fine finishing through higher-build applications.
• Optimised atomization: Suggested atomizing air pressure of 2.0–3.0 bar for W-400 models, providing controlled, even spray patterns.
• Lightweight construction: Only 380 g (without cup) to reduce operator fatigue during extended use.
• Integrated adjustments: Fluid adjustment, pattern width control and air adjustment for fine tuning of output and spray shape.
• ATEX compliant: Protection level II 2 G X, suitable for use in Zones 1 and 2, with discharge of static electricity via conductive air hose.
• Serviceable design: Replaceable air caps, fluid nozzles, needles and seals, with detailed maintenance procedures provided.
• Noise control: Measured noise level of 79.7 dB(A) under specified conditions.

Technical specifications

• Series: W-400 Classic Plus gravity spray guns
• Max. working air pressure: 7.0 bar (100 PSI)
• Suggested atomizing air pressure (W-400 models): 2.0–3.0 bar (29–43 PSI)
• Weight: 380 g (0.84 lbs) without cup
• Noise level (LAeqT): 79.7 dB(A) at 1 m behind gun, 1.6 m height
• Air connection: G1/4" M
• Fluid connection: M16 x 1.5 mm
• Max. temperature – atmosphere: 5–40 °C
• Max. temperature – air/fluid: 5–43 °C
• Recommended paint viscosity: 15–23 s / Ford Cup #4
• Recommended spray distance: 150–250 mm (5.9–9.8 in)
• Approximate nozzle range (W-400 Classic Plus family): 0.8 / 1.0 / 1.2 / 1.3 / 1.4 / 1.6 / 1.8 / 2.0 / 2.5 mm
• Compliance: ATEX 2014/34/EU, protection level II 2 G X

Nozzle and needle combinations (overview)

The W-400 series uses matched nozzle and needle sets. Examples of available combinations include:

• 0.8 mm fluid nozzle (W200/08) with 20012H fluid needle
• 1.0 mm fluid nozzle (W200/10) with 40012 needle
• 1.2 mm fluid nozzle (W200/12) with 40012 needle
• 1.3 mm fluid nozzle (W200/13) with 20015 needle
• 1.4 mm fluid nozzle (W200/14) with 20015 needle
• 1.6 mm fluid nozzle (W200/16) with 20015 needle
• 1.8 mm fluid nozzle (W200/18) with 20018 needle
• 2.0 mm fluid nozzle (W200/20) with 20020 needle
• 2.5 mm fluid nozzle (W200/25) with 20025 needle

Other variants within the W-400 family (such as W-400 Bellaria and W-400 WB waterborne versions) use specific BA or WB-coded nozzles and needles as listed in the technical data.

Applications and use cases

• Car refinish: Designed for automotive refinishing, helping achieve high quality finishes on vehicle panels and bodywork.
• Professional spray booths: Intended for use in well-ventilated sites, ideally in spray booths with proper extraction.
• Solvent and waterborne coatings: W-400 variants (including W-400 WB and WBX within the same family) are configured for different coating types, including waterborne products, as shown in the technical charts.
• Precision touch-up and larger areas: The wide nozzle range allows configuration from fine work (smaller nozzles) to higher material output for larger surfaces (larger nozzles).

FAQ

1. What air pressure should I use with the W-400 gravity gun?

The suggested atomizing air pressure for W-400 models is 2.0–3.0 bar (29–43 PSI). Do not exceed the maximum working air pressure of 7.0 bar (100 PSI).

2. What spray distance is recommended?

The recommended distance from the gun to the workpiece is 150–250 mm (5.9–9.8 in). Keep the gun perpendicular to the surface and move in straight horizontal lines.

3. What paint viscosity works best?

A viscosity between 15 and 23 seconds using a Ford Cup #4 is recommended. Adjust viscosity according to paint properties and painting conditions.

4. Can I use any solvent to clean the W-400?

No. Never use halogenated hydrocarbon solvents such as methyl chloride, dichloromethane, 1.2-dichloroethane, carbon tetrachloride, trichloroethylene or 1.1.1-trichloroethane, as they can damage the aluminium body. Use only compatible cleaners recommended for spray gun maintenance.

5. How should I clean the gun after use?

Drain remaining paint, fill the cup with suitable cleaner, loosen the air cap by two turns and back-flush through the fluid passages while pulling the trigger. Repeat until clean, then remove the air cap and cup, clean all parts with a soft brush and dry thoroughly before lightly lubricating threads.

6. Does the W-400 comply with ATEX regulations?

Yes. The W-400 Classic Plus Series complies with ATEX 2014/34/EU, protection level II 2 G X, suitable for use in Zones 1 and 2. Static electricity from the spray gun must be discharged to ground via a conductive air hose.

7. What is the maximum operating temperature?

The ambient temperature range is 5–40 °C, while air/fluid temperature must remain between 5–43 °C.

8. How heavy is the gun?

The gun weighs 380 g (0.84 lbs) without cup, helping reduce fatigue during extended spraying.

9. What should I do if the gun leaks paint from the nozzle?

Check for dirt or wear on the fluid nozzle, needle or gun body seat. Clean thoroughly and, if leakage persists, replace the affected components (nozzle and/or needle). Also check the needle packing set and spring condition and adjust or replace as needed.

10. Can I spray food or chemicals with this gun?

No. The manual explicitly states that the gun must never be used to spray foods or chemicals, due to risks of corrosion in the fluid passages and possible health issues.

Section 14 – Transport information

Consultar ficha técnica del fabricante.

Section 8 – Individual protection measures

When operating the Iwata GRAVITY GUN W-400, personal protective equipment and safe working conditions are essential:

• Use the gun only in a well-ventilated area, preferably a spray booth, to minimise exposure to organic solvent vapours and reduce fire risk.
• Always wear suitable protective clothing, including safety glasses, mask and gloves, to avoid irritation and inflammation of eyes and skin.
• Wear earplugs when necessary, as noise levels can exceed 85 dB(A) depending on conditions and painting environment.
• Ensure the gun is properly grounded via a conductive air hose (resistance less than 1 MΩ) so static electricity is safely discharged.
• Avoid repeated, continuous trigger operation without breaks to reduce the risk of carpal tunnel syndrome; rest the hand when fatigue appears.

*Contenido generado por IA