Aluminium screw spindle flow meter for oils and viscous liquids

Screw spindle positive displacement flow meter with aluminium body, a cost-effective solution for measuring and dosing viscous liquids. It is intended for non-abrasive fluids with a viscosity between 1 and 5000 mm²/s and offers an accuracy of ±0.1% of reading.

Features

• Measuring ranges from 0.1…10 l/min up to 3.5…350 l/min (oil)
• Accuracy ±0.1% of reading
• Maximum pressure 40 bar, maximum temperature 125 °C
• Female threads from G ½ to G 1½ or flanges from DN 15 to DN 40
• Pulse output, with optional second pulse pick-up
• Uniform, pulsation-free axial flow

Operating principle

The meter works on the positive displacement principle: two precision-machined spindles with a cycloidal profile, supported at each end by ball bearings, are rotated by the axial flow of the liquid. The spindles form measuring chambers of defined volume; their rotation is sensed directly by one or two sensors and converted into pulses for the downstream electronics. The optional second sensor allows flow direction detection and doubles the pulse resolution.

Applications

Measuring and dosing of oils and other non-abrasive viscous liquids.