Precision Metering Pump
Precision metering pumps, filling pumps, high speed filling, liquid filling, pharmaceutical filling, chemical filling, cosmetics filling, high viscosity liquid filling, paste filling 
Precision metering pumps, filling pumps, high speed filling, liquid filling, pharmaceutical filling, chemical filling, cosmetics filling, high viscosity liquid filling 
Precision metering pumps, filling pumps, high speed filling, liquid filling, pharmaceutical filling, chemical filling, cosmetics filling 
Precision metering pumps, filling pumps, high speed filling, liquid filling, pharmaceutical filling, cosmetics filling, electrolyte filling 
Precision metering pumps, filling pumps, high speed filling, liquid filling, pharmaceutical filling, cosmetics filling 
Precision metering pumps, filling pumps, high speed filling, pharmaceutical filling, cosmetics filling, electrolyte filling
Working principle
Check valve type: When the plunger contracts, it creates negative pressure in the pump chamber. The negative pressure causes the outlet check valve to close and the inlet check valve to open, filling the pump chamber with fluid. The amount of fluid drawn into the pump chamber is determined by the stroke of the pump plunger. During the fluid injection stroke, the plunger advances causing positive pressure in the pump chamber. This pressure closes the inlet check valve and pushes the outlet check valve open, allowing fluid to be discharged from the pump chamber. The volume of fluid is controlled by an adjustable micrometer stop that limits the stroke of the pump plunger. Servo position control models are also available. Check valve type pumps are ideal for clean fluids with low to medium viscosity and no particles.
Rotary valve type: Rotary valve pumps contain a slide valve to switch the fluid path from pump inlet to outlet. The suction stroke of the pump is accomplished by the rotary valve in the “inlet” position, allowing fluid to be drawn into the pump chamber. At the end of the suction stroke, the rotary valve rotates to the “outlet” position and then advances the plunger, which discharges the fluid. The volume of fluid is controlled by an adjustable micrometer stop which limits the stroke of the pump plunger. Servo position control models are also available. Rotary valve pumps are suitable for fluid of medium to high viscosity, containing particles.
Rotary piston valve type: Rotary piston pumps are designed with high-precision fit ceramic components, featuring seal-less operation without dynamic sealing. The pump mechanism consists of a rotary piston that moves within a precision-fit sleeve. During the suction stroke, the piston rotates, closing the outlet and opening the inlet. During the contraction of the piston, fluid is drawn into the pump chamber. At the end of the suction stroke, the piston rotates, thereby closing the inlet and opening the outlet. The volume of fluid is determined by the stroke of the ceramic piston. Rotary piston pumps are ideal for pharmaceutical, medical or cosmetic applications with cleaning and sterilization capabilities. Rotary piston pumps are capable of handling low to high viscosity fluids with or without particles.