Application systems for liquid and paste type materials

Published by merscher on

The Widoberg High Velocity spray guns are made for the intermittent, high-pressure spraying of abrasive polishing emulsions and lubricants. The spray volume can be regulated between 0.2 and 6 cm3 per shot. Up to 25% less material is used compared to other types of application systems (e.g. continuous low pressure automatic spray guns).

Widoberg High Velocity spray gun

Widoberg High Velocity spray gun (photo: Widoberg)

The spray guns are operated with regular compressed air of 3.5-6.2 bar and controlled by either a solenoid or foot operated valve. When the piston is actuated with compressed air, the plunger is pushed into the cylinder. Due to the extreme ratio between piston and plunger, an over-pressure is built up inside the gun, the needle valve opens and the material will be ejected through the nozzle. The high velocity of the shot enables the emulsion to cut through the air turbulence caused by the wheel rotation and to penetrate the mop. A knob allows a precise adjusting of the shot quantity.

There are two basic models available: Windoberg HDP-II and WIDO-SPRAY.

The HDP-II model has a higher pressure ratio than the model WIDO-SPRAY and therefore is more suitable to spray compounds over a larger distance or deeper into the buffing wheel for example. The gun can spray between 0.2 and 3 cm3 per shot.

The WIDO-SPRAY model differs from the HDP II. The spray volume is twice as that of the HDP II and therefore especially suited for buffing wheels with a large diameter. The pressure ratio is smaller and the gun sprays softer. In addition, the functions of the gun can be monitored electronically. A central valve cartridge includes nearly all wearing parts and can be changed quickly.