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with the pipe upstream pressure by throttling pieces of the downstream pressure after the throttle pressure difference between a positive and negative pressure, with selecting pressure and pressure in the pipe upstream pressure, in the end, the mouth cone by measuring the pressure difference, between the equation can be calculated according to the flow of the pipeline, pipe center, located in cone to optimize the curve of the medium velocity, high precision measurement instrument, downstream of straight section of low requirements. Third, features Improved significantly by the use of traditional differential flowmeter, improve precision and repeatability, installation, and almost no straight from the cleaning function, suitable for easy scaling smudgy medium, gas-liquid two measuring. Is a kind of close to ideal of throttle device.
1 and after straight demanding shorter, usually only 0-3D upstream and downstream only 0 to 1D. 2, high precision, and can realize differential output value of ± 0.1% of repeatability.
3, pressure loss of small, only for the orifice plates, 1/2-1/3.
4, V trailing vortex cone produces little, differential output stability, fluctuation little.
5, V, by the cone fluid retention without sundry. Four, the main technical parameters 1, precision grades: 0.5, 1.0 2, the pressure of work: 16MPa acuities 3, working temperature: - 30-45 degrees 4 and environmental temperature: - 30-70 degrees 5 and pipe diameter: 15-3000mm 6 and output signal: 4-20mA Seven, the power supply voltage 24V DC. 8 and applicable medium: almost applies to all gas (including dirty gas), the liquid medium.
accurate Intelligent V of v-cone flowmeter