Name: Throttling device
Manufacturer: Shanghai Automation Instrumentation Co., Ltd.
Application: SKC-1200 Throttling device is in a pipe of the fluid flowing through a pipe, a device and a beam will local contraction at the throttle, so that the flow velocity increases, the static pressure is reduced, so the throttling parts produced static pressure difference before and after (or throttle flowmeter).
As the most important branch of flowmeter, throttling device is divided into two categories: standard throttling device and non-standard throttling device. Standard throttling devices include: standard orifice plates, ISA standard nozzles, long neck nozzles, classic venturi and venturi nozzles;  non-standard throttling devices are: the circular orifice plate, a quarter of a round nozzle, a quarter round orifice, conical inlet orifice, segmental orifice, eccentric orifice plate, double orifice, low pressure loss flow pipe, rectangular venturi tube, V cone flowmeter, wedge flowmeter, built-in orifice, in current limit orifice plate, etc.
Throttling flowmeter is a typical differential pressure flowmeter. It is the most commonly used flowmeter for measuring the flow of gases, liquids and vapors in industrial production. According to the survey, the flowmeter used in industrial production systems such as steel mills and refineries is (70-80) percent of the flowmeter. In the whole industrial production area, throttling flowmeter also takes up flow.
More than half of the total number of throttling devices. Throttling flowmeter is so widely used, mainly because it has the following two outstanding advantages:
Simple structure, convenient installation, reliable work,
Low cost and certain accuracy. Can meet the requirements of engineering survey.
It has a long history, rich and reliable experimental data, and the design and processing has been standardized. As long as the throttling flowmeter is designed according to the standard, no actual calibration is required, and the flow can be carried out within the range of known uncertainty.