Model of miniature mass flowmeter for experiment

Gas mass flowmeter main channel middle layer. Small pressure drop caused by flow components, which accounts for a small total flow based on by-pass (controller tube) driver and flow rate, 2 connections on the precise measurement bridge heating resistors suffer from stainless steel tube hazards.& have spentIn the case of zero total flow, the bridge is balanced, but with the increase in total flow, the calorific value along the flow direction, the bridge is more and more unbalanced.The precise measurement of dynamics is subject to a limit as the thickness of the thermal barrier.& have spentBy fitting the phone software in the control panel, the appropriate sound time (within a few seconds) can be obtained.It is proposed to install the filtration device components in the upstream and downstream for the steam polluted by the environment.& have spentThat prevents the proportional transition between the main total flow and the controller pipe and the heat transfer transition caused by the alluvial material on the controller wall thickness

The basic theory of the total flow transformation index of a vapor body is the relative density and specific heat of the vapor body at the thermodynamic temperature, and the molecular structure composition index of the vapor body.For common single and two-component vapors, the transformation index can be found in the technical instructions of the manufacturer's commodity.If understand the relative density of this vapor body and specific heat of constant pressure, still can use the basic calculation formula below go out.

Model of miniature mass flowmeter for experiment

Vapor mass flowmeter can accurately measure vapor types: Air, He, Ar, N2, O2, H2, NO, CO, CH4, NH3, N2O, NO2, CO2

Total flow test gas mass flowmeter which is strong performance parameters of the measuring range categories: 5 SLM quasi accuracy of SCCM - 500: traffic: plus or minus 1% F.S repeatedly precision: plus or minus 0.2% F.S response time: quasi 2 s or less modules: DC 0 ~ 5 v, 4 ~ 20 ma can choose power supply system: DC \ # + 15 v / 24 v can choose, steam flowmeter < 400 ma, panel < 600 ma operating temperature: 0 ~ 70 ℃ stress: work pressure difference: 0.03 ~ 0.5 MPa working medium pressure drop:Material: 316L stainless steel plate rubber seals: fluoroprene, neoprene, butane rubber

Because the relative density of the system software is low, the working pressure and water flow must be very high.The machine divided by the quality water content of the two components in the aqueous solution and the slurry must prevent the precipitation from sticking to the accurately measured wall thickness, or the floating of solid particles.According to the installation equipment azimuth, two inflow flow index is not the same, must be according to the quality flow controller manufacturer factory when the inflow to install, the installation azimuth lies in the place.Under the condition of continuous force change, the machine equipment will not accept zero drift, and the controller needs to be supported by various piping system software.When the water content of foamy vapor body exceeds 1% ~ 5% volume water content, the bubble attenuation coefficient will cause the total flow tube vibration of the generator coriolis force, and the vapor body will be placed in front of the controller.

The quality flow controller is capable of outputting flow measurements to standard electronic signals.It is very easy to maintain the large number of the total flow display information, the accumulation of total flow automatic metrology verification, information automatic preservation, computer management and so on.For a quality flow controller, an automatic control system that maintains total flow.Generally, the simulated MFC/MFMI/O data signal is 0~+5V or 4~20mA, and the digital MFC/MFM is also equipped with RS232 or RS485 large digital serial communication port, which can be very convenient to connect with the electronic computer to carry out automatic control system.

Quality Flow Controller, the Mass Flow Controller (MFC), not only has the role of the Mass flowmeter, crucially, it can automatic control system for gas pressure, the customer can be set up according to must carry out traffic, MFC automatic traffic to stable on default values, even if the system software work stress has ups and downs or working temperature change, is not easy to make its migration default value.

The customer shall apply mass flow timing. Regardless of whether the customer is working in a reaction room with a vacuum pump or at high pressure, the pressure difference between the two sides of the air in and out of the MFC shall be maintained within the specified pressure difference and the standard pressure shall be stable.If left and right three points are guaranteed, MFC can work smoothly under high pressure standards.The quality flow controller can be used to operate a wide variety of vapors, including corroded vapors and unique vapors. However, it is important to note that appropriate models, specifications and rubber seals must be selected for the application of corroded vapors and unique vapors.

This means that, under different application standards, the total flow rate indicated on such dashboards is the total flow rate at thermodynamic temperature.The thermodynamic temperature requirements are as follows: standard air pressure -- 101325Pa (760mm Hg);Temperature -- 0℃ (273.15k).It is the key difference between this type of gauge and other steam flowmeters, where SCCM and SLM differ from mL/min and L/min.

When purchasing mass flow timing, the customer must make a unique declaration to the delivery manufacturer to apply the steam body, in case the motor selection or selection of rubber seals is not correct, resulting in significant losses.Generally, the wet raw materials of steam mass flow controller are 316L stainless steel plate, polytetrafluoroethylene and rubber seals, etc. Rubber seals are divided into metal materials and sealing gaskets.

Porcelain city of all flowmeters, small to a screw hole, large to the case and gear are using Germany Siemens CNC machining center to complete, completely get rid of the current domestic mechanical and manual mixing operation of the manufacturing process, elliptical gear manufacturing process will produce a milestone change.