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1. Classification of throttling devices
As the most important branch of flow meters, throttling devices are divided into two categories: standard throttling devices and non-standard throttling devices. Standard throttling devices include: standard orifice plate, ISA standard nozzle, long neck nozzle, classic Venturi tube, and Venturi nozzle; Non standard throttling devices include: annular orifice plate, quarter round nozzle, quarter round orifice plate, conical inlet orifice plate, circular orifice plate, eccentric orifice plate, double orifice plate, low-pressure loss flow rock excavation tube, rectangular Venturi tube, V-shaped cone flowmeter, wedge-shaped flowmeter, hidden orifice plate, limiting orifice plate, etc.
2. Radar water flow meter
3. What is a throttling device? What does a throttling device include?
A throttling device is a flow device set in a fluid filled with a pipeline, which causes the flow beam to locally contract at the throttling point, increases the flow velocity and reduces the static pressure, thereby creating a static pressure difference before and after the throttling element. This device is also known as a throttling flowmeter.
. Throttling devices are mainly divided into two categories:1. Standard throttling devices. Standard orifice plates: This is one of the most common throttling devices, with the characteristics of simple structure, easy installation, and wide applicability. Long neck nozzle: Its design helps reduce energy loss of fluid during throttling process and improve measurement accuracy. Classic Venturi tube: By gradually contracting and expanding the shape of the pipeline, a stable pressure difference is generated during the throttlin
2. Non standard throttling device annular orifice plate: has a special annular opening, suitable for measuring specific fluid conditions.
. Quarter round nozzle and quarter round hole plate: This only includes devices that use partially open throttling elements to achieve fluid throttling and measurement. Conical inlet orifice plate: Its conical inlet design helps reduce fluid eddies and turbulence before throttling, improving measurement stability. Circular orifice plate, eccentric orifice plate, and double orifice plate: These devices adapt to different fluid conditions and measurement requirements by changing the shape and position of the throttling element. Low pressure loss flow tube, rectangular Venturi tube, wedge-shaped flowmeter: These throttling devices can reduce pressure loss of fluid during throttling while maintaining high-precision measurement. Concealed orifice plates and flow limiting orifice plates: These devices are typically used in specific application scenarios, such as limiting fluid flow or protecting downstream equipment from high-pressure impacts. The selection of throttling devices should be comprehensively considered based on specific fluid conditions, measurement accuracy requirements, and installation space.
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