Current position > Product detail
『Metal tube rotor flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. What are the effects of medium changes on the accuracy of rotor flow meters?
The impact of medium changes on the accuracy of rotor flow meters is mainly reflected in three aspects: density, viscosity, and corrosiveness, which can directly lead to measurement errors and even equipment damage. 1. Density affects the force balance of the float when the density of the medium changes. When the density increases, buoyancy increases, and the float position is higher at the same flow rate, indicating that the flow rate is greater than the actual value; When the density decreases, the buoyancy decreases and the displayed flow rate is lower than the actual value. It is necessary to recalibrate according to the actual medium density or select a model with density compensation. 2. Viscosity affects high viscosity media, which will increase the resistance of the floats resistance to movement, causing the float to rise slowly and display a significantly lower flow rate. When measuring media with viscosity greater than 30mPa · s using a regular metal tube rotor flowmeter, the error may exceed 5%, and it is necessary to replace it with a low viscosity sensitive design cone tube or a specially coated float. Corrosive and wear-resistant media can corrode the surface of the float/cone tube, changing the geometry of the flow channel and the weight of the float; The medium containing jujube wood particles will wear down key components. Both will permanently damage the accuracy, and corrosion-resistant materials such as Hastelloy, PTFE lining, or ceramics must be selected according to the properties of the medium. Temperature and pressure have a joint effect, and changes in the medium are often accompanied by changes in temperat
2. Common faults and solutions of metal tube rotor flowmeter
The common faults and solutions of metal tube rotor flowmeter are as follows:
1. Large measurement error. Gas medium is affected by temperature and pressure. Reason: Gas density changes significantly with temperature and pressure, and uncompensation can lead to errors.
. Solution: Adopting temperature and pressure compensation function, real-time correction of flow value through sensors. Reason for loosening of moving parts: Long term use or pipeline vibration can cause displacement of magnetic steel, pointers, counterweights, and other components. Solution: Verify by manually pushing the pointer: Press the pointer to the