Turbine flowmeters for gases

Turbine meters for gas applications

Turbine meters designed for gas applications take into account the properties of gas. Gas always has a low viscosity and is poor - a gas has no lubricating properties which the turbine bearing can take advantage of. This is why gas turbine gauges are always fitted with ball bearings lubricated with a suitable oil or the instruments are fitted with self-lubricating ball bearings. For UHP applications therefore, turbine flowmeters are almost never used.

As the gas flows through the turbine flow meter, it has some friction on the inlet pieces, the built-in flow conditioners, and also on the turbine itself. The viscosity therefore has an important effect on the performance of such an instrument. During the calibration of turbine flowmeters the Reynolds number as it occurs in the application is taken into account.