Metal rotor flow meter

The metal rotor flowmeter is suitable for measuring the flow of liquid, gas and steam. It is especially suitable for the measurement of medium flow with low flow rate. It gives full play to its advantages in small diameter and low flow rate medium flow measurement and is widely used in chemical, food and pharmaceutical industries. It has the characteristics of simple structure, reliable operation, wide application range, accurate measurement and convenient installation. It has the characteristics of high temperature and high pressure resistance. This product has ordinary type and anti-corrosion type. The above two types are divided into on-site indication type and electric remote transmission type. The ordinary type flow sensor instrument material is anti-corrosion type and is lined. If the medium measured by the metal rotor flowmeter contains ferromagnetic particles, A magnetic filter should be installed at the flowmeter inlet. Its material should be the same as the corresponding flow meter.
Working principle of metal rotameter
The flowmeter consists of two parts. The rotameter is a tapered tube that gradually expands from bottom to top. The other is placed in a tapered tube and A rotor that can move freely up and down along the centerline of the tube. When the rotameter measures the flow of a fluid, the measured fluid flows from the lower end of the tapered tube and the flow of the fluid impacts the rotor and exerts a force on it (the size of this force changes with the flow rate). When the flow rate is large enough, The force lifts the rotor and raises it. At the same time, the measured fluid flows through the annular section between the rotor and the tapered tube wall and flows out from the upper end. When the measured fluid flows and the force exerted on the rotor is exactly equal to the weight of the rotor in the fluid (called the displayed weight), the rotor is in a balanced state and stays at a certain height. Analysis shows that there is a corresponding relationship between the position and height of the rotor in the tapered tube and the flow rate passing through it. Therefore, the corresponding flow value can be obtained by observing the position and height of the rotor in the tapered tube. In order to prevent the rotor from touching the pipe wall when moving up and down on the center line of the tapered tube, two methods are usually used. One is to install a guide mandrel in the center of the rotor to keep the rotor moving up and down on the center line of the tapered tube. The other is to One is that there are chute grooves on the edge of the rotor disk. When the fluid flows through the rotor from bottom to top, it bypasses the rotor and at the same time passes through the chute to generate a reverse thrust to make the rotor rotate around the center line continuously, thus keeping the rotor in place. Do not touch the pipe wall when working. The rotor material of the rotameter can be made of stainless steel, aluminum bronze, etc.
Technical Parameters of Metal Rotameter
Basic
Measuring Range Water/Air
Range Ratio
Accuracy/
Working Pressure
Working Temperature ~ ( Fluorine plastic lining~ )
Ambient temperature ~ Medium viscosity, pipe body material, lining, etc.
Process connection flange or as provided by the user
Steam best sleeve flange/or as provided by the user
Remote transmission device
①Angular displacement transmitter
Basic error
Output signal~ Load impedance
Power supply voltage
Ambient temperature~ Explosion-proof mark at outlet
② Transmitter
Power supply influence (excluding digital resolution [)
Load influence (excluding digital resolution [)
Current consumption~ Relative to the measured value
Load impedance~ Working voltage two-wire system [] (power supply [])
Output signal ~ Ambient temperature ~ Explosion-proof mark at the outlet