Installation and use: how to correctly choose the glass rotor flow meter: the glass rotor FLOW METER is a simple use, convenient reading, a very wide use of the instantaneous flow measurement instrument. In the category of environmental protection equipment and instruments, more than 30,000 sets per year are used. Therefore, it is very important to choose and use this instrument well.
Glass ROTA METER varieties and selection of glass rotor flow meter: glass rotor flow meter according to its use and adaptation scope can be divided into: ordinary, reinforced vascular type, small flow and small shape, rot resistant, laboratory, thermal insulation, alarm and high pressure resistant eight series. According to the national instrument series type spectrum, no matter which series, includes up to from 1 mm to 100 mm a total of 12 caliber number, the measurable flow range is: liquid (water) 0.1 ml / minute ~40 cubic meters / hour, gas (air) 1 ml / minute ~1000 cubic meters / hour. The glass rotor flow meter used for environmental protection instruments generally does not exceed 10 mm in diameter, and the measured flow rate is in a small flow range.
Scale correction of glass rotor flow meter: The scale of glass PANEL FLOW METER is obtained by the use of nearly ideal fluid water and dry air as medium calibration by the manufacturer under the factory conditions. But in the use of the flow meter site, there are two situations can not directly use its scale value: one is the measurement medium is not water and air, the other is to measure and although the medium is water and air, but its state (temperature. Pressure) is different from the scale state. In this way, when using the flow meter, you need to correct the correct measurement. Therefore, solving the glass rotor flow meter scale correction, is the key to well use this instrument.
Considering the large amount of the rotor flow meter, only the density correction of the gas medium measurement is discussed below. Because the viscosity of the gas medium is very small, the viscosity influence is omitted from the discussion. Practice has proved that this does not affect the corrected accuracy.
Main features: small pressure loss; reliable performance; simple structure, easy installation and use; cheap price.
The main measuring element of the glass GAS FLOW METER is a vertically mounted conical glass tube and a float, movable up and down inside. The cone tube goes up at the end, and when the fluid passes from the bottom up through the cone glass tube, the pressure difference occurs between the float, and the float rises under the differential pressure. When the rising force of the float is equal to the resultant force of the gravity, the float and the viscosity force of the float, the float is in the equilibrium position. Therefore, there is a certain proportional relationship between the fluid flow through the glass rotor meter and the rising height of the float, that is, and the flow meter area of the glass rotor meter, and the position height of the float can be regarded as the flow measure. Corruption-resistant series glass rotor is mainly composed of conical glass tube, float, upper and lower base and support parts connection and combination.
According to the use and adaptation scope of the glass rotor flow meter can be divided into: ordinary type, band band vascular type, small flow rate and small shape type, rot resistance type, laboratory type, thermal insulation type, alarm type and high pressure resistance type eight series.