A gas mass flow controller is an instrument that measures gas flow

The gas mass flow controller is an instrument for measuring gas flow. Its measured value is not inaccurate due to fluctuations in temperature or pressure. It does not require temperature and pressure compensation. It can set the flow rate according to needs and automatically keep the flow rate constant at the set value. Even if the system pressure fluctuates or the ambient temperature changes, it will not deviate from the set value. Gas mass flowmeters are widely used in steel plants, coking plants, petroleum, chemical, thermal power, thermal power plants, environmental protection and other industries. The gas mass flowmeter has high accuracy, high reliability, simple installation and convenient operation. The flow measurement and control of the gas mass flow controller will not be affected by temperature and pressure. Compared with traditional equipment, it does not need to configure temperature and pressure transmitters, and does not need temperature and pressure compensation. The mass flowmeter can be directly measured. Today we will explain what factors affect the gas mass flow controller? The following editor will talk about it for you; 1. The pressure of the gas measured by the CMF used in the gas dispenser is not low. At 20MPa, the pressure is far greater than atmospheric pressure. The high pressure changes the internal stress of the vibrating tube and increases the equivalent stiffness of the elastic tube, thereby increasing the vibration frequency of the vibrating tube and reducing the phase difference between the two tubes; when the gas flows through the vibrating tube, there is a pressure drop, which makes the vibrating tube The force is asymmetrical, which also affects the phase difference. 2. Temperature influence The working temperature of the CMF used in the dispenser is much lower than the room temperature, and the temperature influence must be considered; the change of the medium temperature or the ambient temperature will change the Young's modulus of the measuring vibrating tube and affect the structure of the zero drift and other factors. 3. Flow rate problem Compressed gas has low density and fast flow rate, and its influence cannot be ignored. Ideally, as the flow rate increases, the vibration frequency of the vibrating tube decreases. Generally, the change of fluid density is small, and it can be considered that the flow rate is proportional to the mass flow rate of the fluid. Therefore, the compensation of flow rate can be converted into a nonlinear factor of flow rate change for compensation.

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