Bob Heine
Oldtimer
The Iwata LPH400 is an excellent spray gun for the automotive refinish professional. It has gained a well-deserved reputation for proper atomization and superior results.Not sure who wrote this or even if it's useful. I believe it was posted on the old site.
The LPH400 is available with three caps that make the gun perform different jobs. Generally, the silver (LV) cap is for clears, the orange (LVX) cap is for basecoat, and the purple (LVB) cap is for difficult metallic and pearl basecoats. Only a cap swap is needed with no needle change.
- The orange (LVX) cap works for both clear and basecoats with satisfactory results.
- The silver (LV) cap atomizes clears better and the clear will lay out flatter.
- The purple (LVB) cap will help control difficult basecoat colors.
Initial gun setup is simple:
- Adjust the air valve knob on the bottom near the air inlet to its fully open position.
- Adjust the material control valve, the larger knob, so that 3 to 4 threads are visible.
- Attach a temporary pressure gauge or use an inlet regulator and adjust the inlet pressure.
- 12 to 16 psi for basecoat.
- 16 to 20 psi for clears.
- Pressures are set while pulling the trigger fully.
- Test your pattern on paper at about seven inches away.
- Adjust the fan control knob, the small one on top, to the desired length of 8 to 10 inches.
- Fine tune as needed.
Pulling the trigger of the gun with the pattern and air adjustment knobs fully opened, adjust the air regulator in the spray booth to obtain 1.0~1.1 bar (14~16 PSI) at the gun inlet. In this way the gun will atomize within 0.7 nst z010 PSI) inside air cap.
NOTE
Using a 12 m (50 ft) long air hose, the inner diameter must be a minimum 8 mm (0.315 in) so the gun can have the correct air volume to atomize at 0.7 bar (10 PSI) inside air cap.