Flow Systems Inc products

A “sonic nozzle” (also known as “Critical Flow Venturi” or “Critical Flow Nozzle”) is a flow meter that can be used as a calibration standard for gas flow meters or any flow measurement device. By design, sonic nozzles are a constant volumetric flow meter. However, with the use of a regulated pressure supply, the sonic nozzle becomes a “state-of-the-art” mass flow meter. Considering both the divergent section design and the flow rate, sonic nozzles may operate with an exit pressure as high as 90% of the inlet pressure.

Subsonic meters have long been used to provide quality flow measurements of both gases and liquids. Flow Systems designs, manufactures and integrates subsonic Venturis, ASME Flow Nozzle and orifice meters for use in many applications. The mass flow through an subsonic meter is proportional to the square root of the product of density and the metering differential pressure. Thus these devices can service a range of mass flow rates at a constant density. This is an attractive feature in low-pressure systems.