Dosing machine components

In the SONDERHOFF 3E PUR dosing cell, the dosing machine components are mounted on the side of the cell. This is where e.g. the precision gear pumps, compressed air connection and dryer, and the maintenance unit and high-pressure water unit for mixing head rinsing are located. The double-walled material pressure tanks in the optimized sizes for the asymmetrical mixing ratios of the A and B components of the 2K polyurethane systems are also installed here.

The material pressure tanks are equipped with various sensors, indicating whether the pressure tank is empty or needs to be refilled. For the material pressure tanks, an extension with a refilling station for automating the material supply is possible on request. For that case there is an overfilling protection mechanism on the pressure tanks.

Material preparation for the 3E PUR:

• Material pressure tank with fill-level sensors, safety pressure valve (TÜV type-tested), overfilling protection and shut-off ball valve, with compressed air fittings and compressed air reducing valves for pre-pressure regulation of the tank pressures

• 44 l material pressure tank, double-walled, chrome-nickel steel for material component A

• 24 l material pressure tank, double-walled, chrome-nickel steel for material component B

• Wire mesh filter cartridges and plate gap filters

• Three-phase agitator running at 99 rpm for tank A

• Automatic air loading

• Optional: material supply through refilling stations for containers from 20 to 1,000 liters

• Precision gear pumps: delivery rate 0.75 ccm/rev (material component A) and 0.3 ccm/rev (material component B

• Hose package: material component A: fabric-reinforced polyamide high-pressure hose, material component B: steel-reinforced Teflon high-pressure hose, recirculation hose package