Corrosion resistant gas rotor flowmeterNowadays, it is widely used in industries such as petroleum, chemical, metallurgy, power, light industry, building materials, environmental protection, pharmaceuticals, food, gas, tap water, building automation, etc. Corrosion resistant gas rotor flowmeter is the most commonly used flowmeter in industry and laboratory. The anti-corrosion gas rotor flowmeter has the characteristics of simple structure, intuitive design, low pressure loss, and easy maintenance. The anti-corrosion gas rotor flowmeter is suitable for measuring small flow rates through pipelines with a diameter D<150mm, and can also measure the flow rate of corrosive media. When in use, the flowmeter must be installed on a vertically oriented pipe section, and the fluid medium passes from bottom to top through a corrosion-resistant gas rotor flowmeter.

The anti-corrosion gas rotor flowmeter is a major contributor to sales due to its easy installation, simple use, and affordable price. Corrosion resistant gas rotor flow meters all have a measurement accuracy, which is commonly referred to as the range of measurement errors. So what are the reasons that can cause measurement errors in anti-corrosion gas rotor flow meters to increase?

1. Installation does not meet the requirements

Generally, anti-corrosion gas rotor flow meters are installed vertically. When installingCorrosion resistant gas rotor flowmeterThe inclination angle cannot exceed 20 degrees. Of course, some anti-corrosion gas rotor flow meters are installed horizontally. For horizontal installation of anti-corrosion gas rotor flow meters, they should be kept horizontal and the inclination angle should not exceed 20 degrees. There should be no ferromagnetic objects in the 100mm space around the anti-corrosion gas rotor flowmeter. The installation position of anti-corrosion gas rotor flowmeter should be far away from valve reducers, pump outlets, process pipeline bends, etc. Maintain the requirement of a straight pipe section of 250mm after the first 5D.

2. Gas media are greatly affected by temperature and pressure

The anti-corrosion gas rotor flowmeter is calibrated before leaving the factory, and the flow scale is calibrated according to the temperature and density of the medium provided by the user. The gas medium is greatly affected by temperature and pressure, so the user needs to provide accurate and commonly used temperature values.

3. The density of liquid medium varies greatly

Before calibrating the anti-corrosion gas rotor flowmeter, the medium is converted to the density given by the user and calibrated to the flow rate of water in the calibrated state. Therefore, if the medium density changes greatly, it will cause significant measurement errors. The solution is to input the changed medium density into the formula, convert it into an error correction factor, and thenCorrosion resistant gas rotor flowmeterMultiply the measured flow by a coefficient to obtain the actual flow.

4. Long term use and pipeline vibration

Multiple factors have caused the loosening of moving parts such as sensing magnets, pointers, counterweights, and rotating magnets in the corrosion-resistant gas rotor flowmeter, resulting in significant errors. Solution: You can first verify by manually pushing the pointer. Firstly, press the pointer at the RP position to check if the output is 4mA and if the flow display is 0%. Then, verify according to the scale in sequence. If any discrepancies are found, the position of the components can be adjusted. Generally, professional personnel are required to adjust the anti-corrosion gas rotor flowmeter, otherwise it may cause position loss and need to be returned to the anti-corrosion gas rotor flowmeter manufacturer for calibration.