『Calculation formula for V-cone flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. What are the types of mass flow meters?
2. Instrument calibration of differential pressure flow meters.
The calibration of a pair of differential pressure flow meters includes: ⑴ geometric inspection method and ⑵ coefficient calibration. For the introduction of geometric inspection method, please refer to the calibration regulations, which will not be repeated here. The following is a brief introduction to the relevant calculation formulas and methods involved in the coefficient verification method. The second calculation formula is v=aA √ 2/j (p-q) v - volume j - liquid density a - flow coefficient, which is related to the pressure measurement method and flow rate of the channel size. A - orifice plate opening area p-q - pressure difference orifice plate calculation outflow coefficient C formula (compiled by the author) Reynolds number can be calculated according to the relevant formula, such as the commonly used calculation formula for Reynolds number eDR. 9. The basic error limits of the sensor should comply with the provisions of Table 8. Measurement accuracy: ± 0.2% ± 0.5% ± 1.0% Repetitive accuracy: ± 0.2% Sensor error requirements. The above calibration information is provided for reference by users with calibration devices. If there is any calibration related to JJG640-1994, please refer to it. In case of any violation of regulations, the regulations shall prevail. There are many types of differential pressure flow meters, and currently the commonly used differential pressure flow meters in the market include Bitoba flow meter, orifice plate flow meter, V-cone flow meter, Annubar flow meter, Widiba flow meter, Diamond bar flow meter, Delta bar flow meter, porous Pingqin travel balance flow m
3. Working principle of V-cone flowmeter
The V-cone flowmeter (SKV cone flowmeter) works based on the principle of differential pressure. It changes the fluid flow velocity distribution through the cone flow blocking element, forming a stable differential pressure in the pipeline, and then calculates the flow rate by measuring the differential pressure value.
. The specific working principle is as follows: differential pressure principle and energy conversion. The core of V-cone flowmeter is based on the energy conversion principle in sealed pipelines. For stable fluids, the flow rate is proportional to the square root of the velocity of the medium in the pipeline. When the fluid approaches the cone, the pressure is P1; when passing through the cone interception zone, the flow velocity increases and the pressure decreases to P2. P1 and P2 are led to the differential pressure transmitter through the pressure tap, and when the flow velocity changes, the differential pressure value (Δ P=P1-P2) increases or decreases accordingly, reflecting the change in flow rate. The unique design of the conical flow control element ensures uniform flow velocity: the flow velocity distribution of the conventional differential pressure flowmeter is affected by pipe wall friction, with high central flow velocity and low near wall flow velocity. The cone of the V-cone flowmeter is suspended at the center of the pipeline and directly contacts the high-speed fluid, forcing the high-speed zone to mix with the low-speed zone near the wall, resulting in a more uniform distribution of flow velocity. Even at low flow rates, it is still possible to ensure continuous interaction between the fluid and the highest central fl
Hot Blog
Related AD
