Impeller turbine type mass flow meter introduction

An impeller turbine mass flow meter uses two rotating elements in the fluid stream, a turbine and an impeller. Both have channels, or pathways, that the fluid can pass through. The impeller moves at a constant speed, being driven by synchronous motor. The motor moves the impeller through a magnetic coupling and imparts an angular velocity on the fluid as it flows through the meter. The downstream turbine removes all the angular momentum from the fluid and receives torque proportional to the angular momentum. The turbine is restrained by a spring that deflects through an angle that is proportional to the torques exerted on it by the fluid and giving a measure of mass flow.

The impeller, turbine-type mass flow meter uses two rotating elements in the fluid stream, an impeller and a turbine. Both elements contain channels through which the fluid flows.

The impeller is driven at a constant speed by a synchronous motor through a magnetic coupling and imparts an angular velocity to the fluid as it flows through the meter.

Impeller Turbine Mass Flow Meters structure

The turbine located downstream of the impeller removes all angular momentum from the fluid and thus receives a torque proportional to the angular momentum.

This turbine is restrained by a spring which deflects through an angle which is proportional to the torque exerted upon it by the fluid, thus giving a measure of mass flow.

Impeller turbine type mass flow meter features

Low-cost version
Temperature: up to +350°C
Stainless steel
Ceramic bearings resistant to wearing
Suited for polluted liquids
Compact design
Convenient comfortable use

Impeller turbine type mass flow meter specification

Material /

Housing made of PBT 35%GF (Arnite)，PPS 40%GF (Ryton)，PVDF

Mounting position / horizontal pos. recommended

Nozzle sizes / see Tables 1 and 2

Process connection / G1/4“ female on one side or

G1/4“male on both sides (left/right),

or G1/2“male on both sides (for large

operating ranges only)

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-Manuals

Impeller turbine type mass flow meter

-Data sheet

Impeller turbine type mass flow meter application

It is the ideal device especially for tapping small volumes of flow of chemically hostile fluids. The available material combinations are Arnite, Ryton and PVDF which can be deployed in many areas of the chemical industry. With its range of up to 100°C and 20 bar, for a plasticdevice the limits in regard to pressure and temperature are very outstretched and the Open-Collector signal in NPN form can be evaluated by any common control device. The available connection threads are G1/4“ female thread as well as G1/2“ male thread where the user has the option to place both the inlet and the outlet of flow on a single side to have, preferably, one connection on the right side and another on the left side of the flowmeter.

The unique impeller bearing ensures a long life . As against many other devices available in the market, the rotor

is not mounted on both sides but it practically „floats“ during operation over a one-sided bearing pin. Thus, the design of the device ensures durability and, consequently, maximum possible rotational speed of the impeller.