What are the advantages of metal tube float flow meter?
Metal tube float flowmeter is a kind of variable area flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small size, large detection range and easy use. It can be used to measure the flow of liquids, gases, and steam. It is especially suitable for measuring medium flow at low flow rates and small flows.
What are the advantages of metal tube float flow meters over other flow meter products?
1. High temperature resistance, high pressure resistance, corrosion resistance Measurable high temperature, high pressure fluid is the main advantage of the metal float flow meter. It can measure the flow rate of liquid and gas up to 400 °C and pressure up to 70 MPa. In this case, it is no longer possible to observe the floating position with the human eye, and the magnetic coupling sensing display system indicates the flow. The material of the flowmeter itself is often made of high-quality stainless steel, some of which are lined with engineering plastics to measure corrosive fluids.
2. A wide range of applications can be flexibly designed according to the flow process parameters. For example, if the medium tends to crystallize and solidify under low temperature conditions. Or to prevent cryogenic fluids from absorbing heat from the outside. Or when the temperature in the pipeline is higher than the temperature of the fluid flowing through the instrument, due to the temperature drop caused by poor float, or fluid viscosity has a significant impact on the measurement of special needs, can be designed with a jacket thermal insulation; flow rate fluctuation Large, optional flowmeter with damping measures; jacketed heat-preserving flowmeter can vacuum the sandwich to achieve the effect of heat insulation, and can also allow high-temperature steam to flow through the sandwich to achieve the purpose of warming and heat preservation; measuring high-temperature fluids Time. A heat sink is designed in front of the indicator.
3. The interface flexible metal tube float flow meter can easily meet the installation requirements of on-site pipelines. The inlet and outlet can be designed to have a vertical flow into the horizontal outflow structure, and can also be vertically flowed into the vertical outflow, horizontal flow in and out, but also different levels of height Flow into the horizontal flow back and so on.
4. Remote measurement and control, intelligent operation of metal float flow meter in many cases without auxiliary power measurement site, pointer display flow does not require external power supply, usually the display has a modular remote analog output interface (4mA ~ 20mA). The more advanced digital interface is also equipped with a HART communication protocol compatible, which can easily calibrate and test the linearity of the transmitter by means of manual operation or PC programming, or perform on-site parameter setting and joint with the computer to implement remote measurement and control.
Metal tube float flow meter advantages:
Rotary flowmeters are used for small diameters and low flow rates. The diameter of the commonly used instruments is 40-50mm and the minimum diameter is 1.5-4mm. Suitable for measuring low flow rate and small flow rate. Taking liquid as an example, the nominal diameter of full flow of glass tube rotor flowmeter with diameter of 10mm or less is only between 0.2-0.6m/s, even lower than 0.1m/s; metal Tube float flowmeters and glass tube rotometers with caliber greater than 15mm are slightly higher, with flow rates between 0.5-1.5m/s.
2. The rotameter can be used for low Reynolds number, and the float with viscosity-insensitive shape is selected. As long as the Reynolds number at the circulation annular gap is greater than 40 or 500, the Reynolds number variation flow coefficient is constant, ie, the fluid viscosity change does not affect the flow coefficient. . This value is much lower than the minimum Reynolds number of 104-105 for throttling differential pressure meters such as standard orifice plates.
3. Most rotameters do not have upstream pipe requirements, or they do not require high straight pipe sections.
Rotor flowmeter has a wide range of flow rate, generally 10:1, the minimum is 5:1, the highest is 25:1.
5. The output of the flow detection element is close to linear 6 and the pressure loss is low.
7, glass tube rotameter structure is simple and inexpensive.
8, as long as the traffic flow in the field is easy to use.
Disadvantages of metal tube float flowmeters:
1. When using fluid and factory calibration fluid is different, flow indication correction should be made. Rotor flowmeters for liquids are usually calibrated with water. The gas is calibrated with air. If the actual fluid density and viscosity are different, the flow rate should deviate from the original indexing value and must be converted for correction.
2. Glass Rotameters have the risk of fragile glass tubes, especially non-guided structure floats for gas.
3, most of the structure of the float flow meter can only be used for vertical flow from bottom to top installation.
4. The application of the rotameter is limited to small and medium diameters. The general full-flow rotameter cannot be used for large diameters. The maximum diameter of the glass tube rotameter is 150mm, and the metal rotameter is 200mm. The larger diameter can only be used for diversion. Type instrument.
Metal tube float flowmeter
What are the advantages of metal tube float flow meters over other flow meter products?
1. High temperature resistance, high pressure resistance, corrosion resistance Measurable high temperature, high pressure fluid is the main advantage of the metal float flow meter. It can measure the flow rate of liquid and gas up to 400 °C and pressure up to 70 MPa. In this case, it is no longer possible to observe the floating position with the human eye, and the magnetic coupling sensing display system indicates the flow. The material of the flowmeter itself is often made of high-quality stainless steel, some of which are lined with engineering plastics to measure corrosive fluids.
2. A wide range of applications can be flexibly designed according to the flow process parameters. For example, if the medium tends to crystallize and solidify under low temperature conditions. Or to prevent cryogenic fluids from absorbing heat from the outside. Or when the temperature in the pipeline is higher than the temperature of the fluid flowing through the instrument, due to the temperature drop caused by poor float, or fluid viscosity has a significant impact on the measurement of special needs, can be designed with a jacket thermal insulation; flow rate fluctuation Large, optional flowmeter with damping measures; jacketed heat-preserving flowmeter can vacuum the sandwich to achieve the effect of heat insulation, and can also allow high-temperature steam to flow through the sandwich to achieve the purpose of warming and heat preservation; measuring high-temperature fluids Time. A heat sink is designed in front of the indicator.
3. The interface flexible metal tube float flow meter can easily meet the installation requirements of on-site pipelines. The inlet and outlet can be designed to have a vertical flow into the horizontal outflow structure, and can also be vertically flowed into the vertical outflow, horizontal flow in and out, but also different levels of height Flow into the horizontal flow back and so on.
4. Remote measurement and control, intelligent operation of metal float flow meter in many cases without auxiliary power measurement site, pointer display flow does not require external power supply, usually the display has a modular remote analog output interface (4mA ~ 20mA). The more advanced digital interface is also equipped with a HART communication protocol compatible, which can easily calibrate and test the linearity of the transmitter by means of manual operation or PC programming, or perform on-site parameter setting and joint with the computer to implement remote measurement and control.
Metal tube float flow meter advantages:
Rotary flowmeters are used for small diameters and low flow rates. The diameter of the commonly used instruments is 40-50mm and the minimum diameter is 1.5-4mm. Suitable for measuring low flow rate and small flow rate. Taking liquid as an example, the nominal diameter of full flow of glass tube rotor flowmeter with diameter of 10mm or less is only between 0.2-0.6m/s, even lower than 0.1m/s; metal Tube float flowmeters and glass tube rotometers with caliber greater than 15mm are slightly higher, with flow rates between 0.5-1.5m/s.
2. The rotameter can be used for low Reynolds number, and the float with viscosity-insensitive shape is selected. As long as the Reynolds number at the circulation annular gap is greater than 40 or 500, the Reynolds number variation flow coefficient is constant, ie, the fluid viscosity change does not affect the flow coefficient. . This value is much lower than the minimum Reynolds number of 104-105 for throttling differential pressure meters such as standard orifice plates.
3. Most rotameters do not have upstream pipe requirements, or they do not require high straight pipe sections.
Rotor flowmeter has a wide range of flow rate, generally 10:1, the minimum is 5:1, the highest is 25:1.
5. The output of the flow detection element is close to linear 6 and the pressure loss is low.
7, glass tube rotameter structure is simple and inexpensive.
8, as long as the traffic flow in the field is easy to use.
Disadvantages of metal tube float flowmeters:
1. When using fluid and factory calibration fluid is different, flow indication correction should be made. Rotor flowmeters for liquids are usually calibrated with water. The gas is calibrated with air. If the actual fluid density and viscosity are different, the flow rate should deviate from the original indexing value and must be converted for correction.
2. Glass Rotameters have the risk of fragile glass tubes, especially non-guided structure floats for gas.
3, most of the structure of the float flow meter can only be used for vertical flow from bottom to top installation.
4. The application of the rotameter is limited to small and medium diameters. The general full-flow rotameter cannot be used for large diameters. The maximum diameter of the glass tube rotameter is 150mm, and the metal rotameter is 200mm. The larger diameter can only be used for diversion. Type instrument.
Metal tube float flowmeter
Isostatic Graphite Block,Graphite Block---Isostatic Graphite,Graphite Block For Edm Application,Artificial Isostatic Pressing Graphite Block
CARBONS TECH&CREATION(HENAN) INDUSTRY CO.,LTD , https://www.carbongraphitepart.com