LZ500 metal tube rotameter Overview: 1, LZ500 metal tube variable area flowmeter using the measuring principle, suitable for measuring liquids, gases. All-metal structure, indicating type, electric remote type, corrosion-resistant type, high-pressure type, dips, explosion-proof. With a standard analog signal output and on-site instruction 0-10mA, 4-20mA's. Cumulative, digital communications, on-site measurement parameters modify, different power supply function with magnetic filters and special varieties. Widely used in petroleum, chemical, power generation, pharmaceutical, food, water and so on. Complex, harsh environmental conditions, and flow measurement conditions during various media. 2, LZ500 metal tube rotameter is commonly used in industrial automation and process control a variable area flow measurement instruments. It has a small, large detection range, easy to use features. It can be used to measure liquid, gas and steam flow, particularly suitable for medium flow measurement of small flow of low velocity. LZ500 metal tube variable area flowmeter some of the features: a rugged all-metal design type rotameter 2, using an independent indicator of the conceptual design of the measuring tube 3, available in stainless steel, Hastelloy, Titanium, PTFE material measurement system 4, low pressure loss design 5, short stroke, compact design, the total height of 2506 meter, magnetic coupling structure ensures data transmission, the signal is more stable 7, insulation or heating jacket 8, vertical, horizontal, various installation more 9 for different occasions, for small caliber and low velocity flow measurement medium 10, reliable, low maintenance, long life and 11, do not ask for a straight pipe 12, a wide flow ratio of 10: 113, two-line large LCD, optional on-site instantaneous / accumulated flow display, backlit 14, uniaxial sensitive instructions 15, 16 non-contact magnetic coupling drive, all-metal construction, suitable for high temperature, high pressure and corrosive media 17 can be used for flammable and explosive hazardous locations 18, the election wire, battery, AC power supply 19, 20 multi-parameter calibration function with data recovery, data backup and power-down protection LZ500 metal tube rotameter main technical parameters: ◇ Measuring range: water (20 ℃) ??1-200000 L / h air (20 ℃, 0.1013MPa) 0.03-4000m3 / h; see flow meter, flow can be ordered ◇ special turndown ratio: Standard 10: 1 ◇ Accuracy: Standard 1.0 ; special type 0.5 ◇ pressure levels: Standard: DN15-DN50 4.0MPa DN80-DN200 1.6MPa special type: DN15-DN50 25MPa DN80-DN200 16MPa pressure rating jacket 1.6MPa; former special type in the selection and ordering shall consult with the factory ◇ pressure loss: 7kPa-70kP ◇ medium temperature: Standard: -80 ℃ - + 200 ℃: PTFE: 0 ℃ -85 degrees high temperature: up to 300 ℃ ◇ medium viscosity: DN15: η <5mPa. s (F15.1-F15.3) / η <30mPa.s (F15.4-F15.8) DN25: η <250mPFa.sDN50-DN150: η <300mPa.s ◇ ambient temperature: pointer type -40 ℃ - + 120 ℃ ◇ Connection: Standard: DIN2501 standard flange special type: specified by the user to any standard flange or threaded ◇ Cable Interface: M20 * 1.5 ◇ Power supply: Standard: 24VDC wire 4-20mA (10. 8VDC-36VDC) ◇ Alarm output: upper or lower instantaneous flow alarm, open collector output (100mA @ 30VDC maximum internal impedance of 100 ohms) relay output (contact capacity 1A @ 30VDC or 0.25A@250VAC or 0.5A@125VAC) ◇ Pulse output: Cumulative pulse output, the minimum interval of 50 milliseconds ◇ LCD: display instantaneous flow value range: 0-50000 cumulative flow display range of values: 0-99999999 ◇ protection (available with a decimal point): IP65 ◇ proof mark: intrinsically safe iaⅡCT5;? structure flameproof dⅡBT6 LZ500 of a metal tube rotameter, high-temperature structure (G-type) high-temperature structural type (G-type) is used for medium temperature is too high or too low and needs to be taken to the measuring tube insulation flow measurement media initiatives. High temperature structure is to increase the distance between the measuring tube and the pointer to increase the cooling, increasing the thickness of the insulating material, to ensure the indicator is in the allowable ambient temperature range. Selection for the "G" type. G-type metal tube can measure the temperature of -80 ℃ - + 300 ℃ flow of media. 2, with the structure of the damper device (Z type) damper structure type flowmeter for measuring the flow medium inlet flow (pressure) is unstable, in particular for measuring gases. Its structure is shown in Figure 3, the jacketed structure (T-type) dips structure required for heating or cooling (such as high viscosity and ease of crystallization) of medium flow measurement. By heating the jacket or cooling medium, the low-boiling point, low freezing point fluid is not vaporized and does not crystallize. Importing and exporting heating medium connection, use HG20594-97 DN15 PN1.6 standard flange, the other flange connection specification may be marked with the manufacturer, the jacket pressure rating of 1.6MPa. 4, the high-pressure type structure ( M-type) structure for high-pressure measured media pressure is greater than the standard pressure rating of flow measurement. Currently LZ500 series of maximum pressure can reach 32MPa. Another high-pressure type flowmeter offers built magnetic filter type, installation height are 350mm. M, ME and MC-type maximum pressure of 10MPa LZ500 installation considerations metal tube rotameter metal tube in order to allow normal operation and can achieve a certain accuracy, when installing the meter to note the following: 1. , metal tube must be mounted vertically on the free vibration of the pipe. Bottom-up flow of fluid through the meter, and the vertical better than 2 °, horizontal installation horizontal angle than 2 °; 2, in order to facilitate maintenance and replacement meter, cleaning of the measuring pipe, mounted on the process line of the metal tube rotameter should install bypass piping and bypass valve; 3, metal tube entrance should be straight pipe length of more than five times the diameter, 250mm straight pipe exports due; 4, if the medium contains ferromagnetic substances, magnetic filter should be installed; if the medium contains solid impurities should be considered between the valve and the straight pipe installation filter; 5, when used in gas measurement, should ensure that the pressure pipe pressure is not less than 5 times the flowmeter loss, so that the stable operation of the float; 6, in order to avoid deformation caused by the flowmeter pipe, process piping flanges must be parallel to each other and coaxial with the flange of the flow meter, tube support and to prevent pipe vibrations reduced flowmeter Axial load measurement system control valve should be installed downstream of the meter: 7, when the measurement of gas, if the gas meter outlet in direct atmospheric emissions, should be installed in the meter outlet valve, otherwise it will produce in the float at pressure drop caused by the data distortion. 8, the installation of PTFE lining of the instrument, not arbitrarily asymmetrical flange nuts tighten avoid PTEF lining deformation; 9, with the meter's LCD, the display should try to avoid direct sunlight, so as not to reduce the life of the LCD; with lithium battery-powered instruments, to avoid direct sunlight, high temperature environment (≥65 ℃) in order to avoid reducing the lithium battery capacity and lifetime.