Flow meter

A turbine flowmeter is a speed-type instrument. The change of density will increase or decrease the rotating torque acting on the impeller proportionally, thereby affecting the displayed volume flow. In the case of measuring liquid, because the density of the liquid changes little, and the bearing friction torque is as small as possible in the […]

There are two reasons for the pressure loss of the turbine flowmeter. One is part of the pressure loss caused by the mechanical resistance of the turbine rotor to the kinetic energy of the fluid. The greater the flow, the higher the speed of the turbine, the greater the mechanical resistance, and the greater the

The development of flow measurement technology and the application demand in the national economy are always interdependent. In a sense, application and demand are the driving force to promote the development of flow measurement technology. Although there are many types and specifications of flow meters so far, with the rapid development of social production, the

In order to ensure the measurement accuracy of the mass flowmeter and long-term stable and regular work, the mass flowmeter should be installed reasonably, used correctly, and strengthened daily maintenance and management. Among various types of flow meters, Coriolis mass flow meters are the most widely used. This chapter will discuss the daily maintenance and

If you want to measure the mass flow of the fluid, you need to use a mass flow meter. Due to the disadvantages of indirect mass flowmeters, such as many error factors, low accuracy grade, and complex structure, direct mass flowmeters should be considered when conditions permit. Coriolis, calorimetric, and impulse flow meters are the

According to the requirements of various objects, electromagnetic flowmeters have simple functions and complete functions, which are mainly reflected in the design of electromagnetic flow converters. When selecting, compare the functions of each model. They have the following different combinations, for example: The output signals are: DC current output, pulse output, status output; Range setting

When applied to pulsating flow places, attention should be paid to the response of the meter to step changes inflow. Transient response is often expressed in terms of time constant or response frequency. The time constant of the electromagnetic flowmeter varies with the excitation frequency, 50/8Hz is often ≥1s, and the time of the quotient

2 inch liquid turbine flowmeter, On-site display, 24V power supply, 4-20mA output, 304 stainless steel body, 2Cr13 impeller, National standard flange connection (not including matching flanges, bolts, and nuts), Pressure resistance 1.6MPa, Temperature resistance -20~ 150℃, Protection grade IP65, Measurement range: 4-40m3/h.

The excitation frequency of most electromagnetic flowmeters is determined by the manufacturer according to the selection and design of the meter caliber, measuring medium, and flow conditions. For example, small-diameter instruments use higher frequencies, large diameters use lower frequencies; single-phase liquids use lower frequencies, and slurries use higher frequencies. If you choose this type of

This is in line with the requirements of IP67 and IP68 in the standard of the enclosure protection level specified by the International Electrotechnical Commission IEC standard IEC529-76 and the equivalent national standard GB 4208-93. Immersion sensors are generally used for large-caliber flow meters for measuring water or sewage. The installation pipes of these flow