Circular orifice meter

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ZW - LGH seriesCircular orifice meterIs on the basis of the standard orifice throttling flow sensor,…

Products overview:
ZW - LGH seriesCircular orifice meterIs on the basis of the standard orifice throttling flow sensor, annular orifice ring because it USES a single structure, make measurements in all kinds of dirt medium through the orifice plate with a circular seam between pipe can easily pass.Not only can measure the general fluid flow, and also can be applied dry of all kinds of impurities (such as dust, floating, precipitation, etc.) of the fluid.Such as all kinds of hot gas, flue gas, natural gas, cooling circulating water, etc.Circular orifice in saturated vapor measurement can avoid stop steam formation during superheated steam condensate accumulation.When gas again, orifice can quickly enter the accurate measurement.Circular orifice another instrument ontology has a straight measuring tube.On-site installation, the installation error (such as eccentric, sealing gasket into pipe) has no effect on meter almost.

Second, the working principle:
ZW - LGH seriesCircular orifice flowmeter is based on the basic principle as well as the standard orifice plate, suitable for the fluid continuity equation and hard equation, the difference is fluid into the measurement section, small flow area is different, the standard orifice small flow area is circular, annular orifice small flow area is circular, the circular flow surface circulation of equivalent circular cross section, the equivalent aperture for d, equivalent aperture than beta = d/d.
When full of pipeline fluid, when they flow through the pipe orifice flow, velocity of flow in forming local contraction flow orifice throttling, accelerated to flow, static pressure is reduced, so the standard orifice plate before and after the pressure drop is produced or differential pressure, the greater the flow medium traffic, the flow orifice of the greater the pressure difference before and after, so can be measured by a pressure difference to measure the size of the fluid flow.This kind of measurement method based on flow continuity equation (conservation of mass) and the Bernoulli equation (energy conservation) based on the principle of.Under the condition of known related parameters, according to the principle of flow continuity and Bernoulli's equation can be deduced the relationship between the pressure and flow rate and flow rate are obtained.The basic formula is as follows:

C - outflow coefficient of dimensionless
D - working conditions or throat diameter of throttle orifice
Upstream pipe diameter D - working conditions
Qm - mass flow Kg/s
Qv - volume flow m3 / s
To decide- diameter ratio d/d dimensionless
The density of fluid Kg/m3
Dimensionless expansiveness coefficient

Applications:
ZW - LGH seriesCircular orifice flowmeter is the orifice differential pressure transmitter with multiple parameters (or differential pressure transmitter, temperature transmitter and pressure transmitter) form a complete set of high contrast range pressure flow device, can measure the rate of flow of gas, steam, liquid and gas, widely used in petroleum, chemical industry, metallurgy, electricity, heating, water supply in areas such as process control and measurement.
1, liquid: hot and cold water, chemical liquid, light body oil.
2, gas, blast furnace gas, coke oven gas, all kinds of single-component multicomponent gas.
3, superheated steam and saturated steam.
4, compressed air.
5, natural gas, the torch gas, liquefied petroleum gas.