Abstract: how to correctly choose the scale turbine flow meter and the installation method of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.
Speed of turbine
flowmeter is a kind of instrument, it has high precision, good repeatability, no zero drift, high range ratio, simple structure, less moving parts, high pressure resistance, wide measuring range, small volume, light weight, small pressure loss, convenient maintenance,.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is how to correctly choose the turbine meter scale and installation method of the article details.
Speed of turbine flowmeter is a kind of instrument, it has high precision, good repeatability, no zero drift, high range ratio, simple structure, less moving parts, high pressure resistance, wide measuring range, small volume, light weight, small pressure loss, convenient maintenance, the turbine flowmeter has high quality bearings and special design of deflector, thus greatly reduce the wear and tear, is not sensitive to the peak, even under harsh conditions can be reliable measurement variables is given.
In petroleum, chemical industry, metallurgy, food, biological, chemical, city gas pipeline network and other industries has wide use value.
Choose suitable model selection of the turbine meter need to consider the following five aspects: 1, according to the request of measuring purpose: asked to choose with instantaneous flow and cumulative flow (
The cumulative flow)
, flow display units, measurement accuracy, repeatability, linearity and flow range and scope of degrees, measuring temperature, pressure, temperature, pressure loss compensation, output signal characteristics and the response time, etc.
Different objects have their respective measurement purposes, have different emphasis on its performance in the instrument.
2, measuring dielectric properties requirements: chemical corrosion and fouling, chemical sometimes become the fluid selection determinants of measurement and instrumentation.
Some fluids will cause corrosion instrument contact parts, surface precipitation scale or produce electrolytic metal surface crystal chemistry.
3, the measured medium group phase: according to the measured medium is single phase change medium or measuring multiphase and multicomponent flow should be treated with caution.
Turbine flowmeter to measure individual clean medium, the electromagnetic flowmeter can measure the solid liquid two phase mixture medium, etc.
Requirements: 4, compression system and other parameters measuring gas need to know the compression coefficient values, in order to calculate the working status of fluid density.
Component fixed fluid density by pressure, temperature and the compression coefficient calculation;
Composition changes of fluid and work towards (
Or in)
Supercritical zone, should consider online measuring density.
5, measurement accuracy requirements: it is necessary to define the measurement accuracy of the overall requirements and is in a particular flow, or in a * scope internal temperature and pressure changes and significant change, its value is generally low, and the differences between various kinds of gas is smaller.
Intelligent liquid turbine flow meter accuracy level commonly used level is 1.
Level 0 and 0.
Level 5, the accuracy level than the average turn a subclass flowmeter is high for high accuracy of the customer is a good choice.
Liquid turbine flow meter is used and the requirement to the installation environment: the ideal flowmeter measurement environment as the guarantee, but a lot of time using the scene of the complex environment also affects the accuracy of turbine flowmeter measurement, divided into velocity meter according to the measuring principle flowmeter and volumetric flowmeter, different measuring methods of installation requirements of the principle of difference is very big.
Speed is straight pipe flow meter is generally require a long enough in order to achieve the purpose of the full package and steady flow rate.
General displacement meter, such as oval gear flowmeter is requirement for straight pipe without too much.
Instrument instruction manual did not elaborate on the instrument, should consider installation position and direction of flow direction, installation, maintenance, space requirements and their effects.
1, security, safety is first flowmeter selection zui to consider factors, such as the requirement of explosion protection performance, used in explosive environment, according to the atmosphere adaptability, explosive mixture grading grouping, protective type electrical equipment as well as other safety rule or standard to choose the instrument.
2, compression strength, requirements of turbine flowmeter shell should be able to withstand test pressure of 1.
5 times zui big 5 minutes work under the pressure of compression strength test, without damage or leakage.
3 turbine flowmeter, environment temperature instrument of electronic components and some flow meter testing parts will be affected by environmental temperature change.
4, environment humidity, high humidity will accelerate atmospheric corrosion and electrochemical corrosion and electrical insulation, low humidity, easily induced electrostatic.
Turbine flowmeter environmental temperature or medium temperature sharp changes in humidity caused problems.
Users should be expected range, to verify whether can lead to a problem in the choice of instrument operation.
5, electrical interference power cables, motors and electrical switch will produce electromagnetic interference, become a source of errors.
So should pay attention to prevention or reasonable effective grounding or shielding interference sources.
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