Flowmeter selection criteria
Flow measurement process, due to the complexity of the measured medium, method of measurement is also varied, which also appeared a variety of the flow measurement device based on different measuring principle. According to the measuring method and structure, can be divided into: electromagnetic flowmeter, differential pressure flowmeter (throttling device), float flowmeter, volumetric flowmeter, turbine flowmeter, ultrasonic flowmeter, etc.; According to the installation, can be divided into: plug-in, closed pipeline, open channel type. How to correctly choose flow meter? Under the share with you my experience.
Objective: to choose and buy
1, there are generally used for measuring trade settlement, like home electric meter, the meter accuracy requirement is generally high, and is used to control the accuracy requirement is not too high.
2, medium, medium shape, density, viscosity, conductivity, and chemical properties, whether there is corrosive, etc.
3, the precision of flowmeter level.
4, environmental factors: the scene of the temperature, pressure, temperature should be used in separation, the header access normal occasions; Live if there is a vibration is also a factor to consider, too much shaking of vortex flowmeters are not appropriate to choose, that from the working principle of vortex street; Straight pipe, enough straight pipe required for each flowmeter is different; Range, range should be used according to actual situation and decide, not too high or too low, the scale range is too large the accuracy will be lower, too low may be super range; Power supply mode, the scene with a 220 v ac power or 24 v dc power supply is also need to consider factors; The diameter of the pipe, I think everyone should know that.
5, operating cost, mainly refers to the late maintenance of instrument. Generally choose electromagnetic flowmeter measuring liquid, but must ensure measuring liquid conductivity, applicable to the measurement of acid, alkali, salt solution, mud pulp, pulp, waste water and other conductive medium volume measurement; Scope more extensive, differential pressure type flow sensor can measure all kinds of mixed gases (such as gas, methane gas, coal gas), all kinds of low temperature gas (liquid nitrogen, liquid oxygen, liquid, liquid argon, liquid ethylene, liquefied petroleum gas, etc.) is generally measuring steam vortex flowmeter, vortex flowmeter is volume flow measurement, the vapor density changes over temperature and pressure, so to form a complete set of temperature and pressure compensation system.
All in all, not a kind of universal meter can be suitable for all occasions, should choose the parameters according to the reasonable flow meter. Flow measurement process, due to the complexity of the measured medium, method of measurement is also varied, which also appeared a variety of the flow measurement device based on different measuring principle. According to the measuring method and structure, can be divided into: electromagnetic flowmeter, differential pressure flowmeter (throttling device), float flowmeter, volumetric flowmeter, turbine flowmeter, ultrasonic flowmeter, etc.; According to the installation, can be divided into: plug-in, closed pipeline, open channel type. How to correctly choose flow meter? Under the share with you my experience.