Positive displacement valves are available as either servo driven auger valves or peristaltic dispensing pumps.
An auger valve is a servo motor driven valve suitable for dispensing
high viscosity pastes. A peristaltic dispensing pump is a volumetric
valve with an adjustable chamber for accurate deposits.
The PDV1000 auger valve has been engineered to dispense small amounts of solder paste
using positive displacement. The auger valve (commonly called a screw
valve) is a servo driven system controlled by the PDC2000 controller for
rotation speed, fluid pressure and reverse drive affecting snuff-back.
The PDV1000 can also be used to dispense higher viscosity materials
greater than 35,000cps.