Home » Catalog » Flowtechnik » Circular Gear & Helical Screw Flowmeters for Accurate Measurement of Low to High Viscosity Fluids. Sizes from 1/4" to 1.1/2". Flows from 0.002 to 1000 l/min. Pressures up to 1000 bar. » SRZ Helical Gearmeter

SRZ Helical gear meter


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Design and Principle 

Two highly accurate cycloid-shaped screw spindles mesh and rotate inside acylindrical housing with two overlapping holes in the form of a figure of 8, which forms the measuring chamber. 
The medium flows in axial direction and rotates the spindles. It is forced along the measuring chamber bores by the profile of the spindles. This happens without pulsation and with minimum leakage. A pickup will inductively detect the speed of the spindle pair through the housing via a pole wheel with a high number of gears. 

The speed of the spindles is absolutely proportional to the volume flow over a very wide range. Pulses per volume unit will finally serve the evaluation (in addition an analogue signal 4 to 20 mA will be available when using the local display unit VTM). The K-factor (calibration factor) of the Helical Flowmeter defines the exact pulse rate per litre. 

We calibrate our Flowmeters to determine their K-factors. Calibration records are part of delivery. When calibrating we consider as much as possible operating viscosities and customers’ specifications.