I. Product Overview:
Wherein: f- vortex separation frequency (HZ); U (this amount, brine flowmeter, the flowmeter paste, ink flow meter, coolant flow meters, ethylene / DIV)
within u- line fluid average velocity (m / s); f = `Sr
d- vortex generating body facing the flow width; (1-1.25d / D)
D- inner diameter of the sensor housing;
Sr- Strouhal number, a dimensionless number. For certain cylindrical vortex body occurs within a certain flow range is a function of the Reynolds number in the range of the normal flow can be considered constant.
From the above equation, the flow in the vortex generator welcome width d and Strouhal number Sr is known conditions, it can be determined the average velocity of the fluid in the pipe and volume flow Qv U by measuring the vortex shedding frequency
Qv = 3600`Uπ (D / 2) 2
Fluid sensor is the number of pulses per unit volume of traffic generated by n Qv sensor meter factor called K:
K = (N / m3)
Alternating force generated by the swirl on the detection probe, so that the internal embedded piezoelectric element generates a charge frequency signal detected by the pre-conversion processing electrical amplification, the output is proportional to the volume flow of the pulse signal, or replace the standard signal output connected with flow indicator and temperature, the pressure sensor, calculates various parameters, display and cumulative like.
three, Liling regulator flowmeter Features:
Jing Chuan LDC type Liling regulator flowmeter It has the following characteristics:
? Delicate and firm structure, no moving parts, long-term stable operation;
? Installation is simple and flexible, easy to maintain;
? May cumulative traffic down protection, protection time up to 10 years;
? High accuracy, the measurement accuracy is typically liquid is ± 1.0%, the measurement accuracy of the gas is ± 1.5%;
? Wide measuring range, in the Reynolds number range 2X104-7X106, up to 1:20;
? Pressure loss is small, low operating costs, meaning more energy-efficient;
? Low power consumption, battery durability, strong seismic performance;
? The output signal is pulse frequency signal, high precision, zero drift;
? Structure forms, there is ducted and plug-in, split and one-to choose from;
( Liling regulator flowmeter Features)
• Use high-tech micro-power, battery-powered field display type flowmeter, do not run off more than two years;
• temperature and pressure compensation integrated design;
• Using split signal converter, cable up to 10 meters.
• wide turndown ratio of 20: 1
• Meter overall structure is reasonable design, wide dynamic measuring range, small pressure loss
• Body made of stainless steel, suitable for measuring corrosive media;
• Field LCD, pulse, 4 ~ 20mA output or 485 communication can be connected with industrial automation systems;
• Simultaneous display flow value and cumulative flow value, do not turn switch.
• Use anti-vibration sensor, the effective elimination of external vibration.
• circuit using surface mount technology, compact structure, high reliability.
• Current outputs are electrically isolated, with good common-mode interference suppression;
• can accurately measure the flow of gas, liquid and steam over a wide range of flow rates without being influenced by the physical properties of the fluid.
• independent of temperature, pressure, and at the same time easy to block, easy card, easy scaling, high temperature, high pressure.
• safety explosion-proof for harsh environments
• No moving parts, no holes slit design, product no wear, dirt-resistant, no mechanical maintenance, long life
( Liling regulator flowmeter Technical Parameters)
Pressure rating: PN25, PN40 (high pressure can be specially manufactured)
Connection: clamp-DN15-DN300; Flange DN15-DN300; plug-DN200-DN2000
Proof in the form: flameproof ExdIIBT4 intrinsically safe ExiaIICT4
Converter housing: die-cast aluminum, painted
Output signal: two-wire 4-20mA current output
Site display: programmable display instantaneous flow, cumulative flow
Communication: RS485 communication; pulse; HART communication
product name: Liling regulator flowmeter
Measuring media: liquid, gas, steam
Medium viscosity: less than 10cp
Medium temperature: -50 ℃ - + 400 ℃
Body Material: 1Cr18Ni9Ti (other material supply agreement)
Sensor seal: graphite gasket (special request)
Ambient temperature: -30 ℃ - + 80 ℃ (special request)
Accuracy: ± 0.5% of measured value (special); gas:: Liquid ± 0.5% of measured value
Supply voltage: 12-36VDC or 3.6V battery
Turndown ratio: 10: 1
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