The LGB standard throttling device operates based on the Bernoulli principle and is combined with various differential pressure gauges, differential pressure transmitters, and flow integrators to form a flow meter for measuring volume or mass flow. It can be used in conjunction with regulating instruments and microcomputers to form a control system. The long diameter nozzle is composed of a 1/4 elliptical inlet constriction and a cylindrical throat.

Radial distance pressure measurement: The pressure measurement is taken as the first 1D and the last 0.5D, that is, D and 1/2D (radial distance).

Mainly used in flow measurement and flow control detection systems for power, petroleum, chemical, industrial water, and steam pipelines.