Through decades of knowledge in the field of commercial and
industrial diaphragm gas meters, our G25 and G40 meter sizes
combine accuracy of measurement and long life in the field.
The G25-G40 diaphragm meters are used for applications requiring high precision
and large rangeability at low pressure (below 1 bar gauge).
Due to the volumetric principle of the diaphragm meter, its metrology is not
influenced by installation conditions.They are designed for use with natural
gas, manufactured gas and other non-
corrosive gases. The G25-G40 diaphragm meters are approved for fiscal use.
The movement of the diaphragm is caused by the pressure difference between the inlet and the outlet of the meter. The reciprocal filling is controlled by means of 2 sliding valves.
This oscillating movement is transformed into a rotational one and is mechanically
transmitted to the totalizer through a magnetic coupling or a stuffing box.