Product Description:
Application:
The SK-HLUG series integrated vortex flowmeter with temperature and pressure compensation is mainly used for flow measurement of industrial pipeline media fluids, such as gases, liquids, vapors, and other media. Its characteristics are small pressure loss, large range, good accuracy, and almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volumetric flow rate under working conditions. No movable mechanical parts. The instrument parameters can remain stable for a long time. This instrument adopts a piezoelectric stress sensor and can operate within a working temperature range of -20 ℃ to+250 ℃. There are analog standard signals and digital pulse signal outputs, which are easy to use in conjunction with digital systems such as computers.
As can be seen from the above equation, the pulse frequency signal output by VSF is not affected by fluid properties and composition changes, that is, the instrument coefficient is only related to the shape and size of the vortex generator and pipeline within a certain Reynolds number range. However, as a flowmeter in material balance and energy measurement, it is necessary to detect mass flow rate. At this time, the output signal of the flowmeter should simultaneously monitor volume flow rate and fluid density. Fluid properties and components still have a direct impact on flow measurement.
The vortex flowmeter is a new type of flowmeter that measures fluid flow in closed pipelines based on the Karman vortex principle. Due to its excellent medium adaptability, it can directly measure the volumetric flow rate of steam, air, gas, water, and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure the volumetric flow rate and mass flow rate under standard conditions.
In order to improve the high temperature resistance and vibration resistance of the vortex flowmeter, an improved vortex flow sensor has been developed. Due to its structure and material selection, the sensor can be used in harsh working conditions such as high temperature (350 ℃) and strong vibration (≤ 1g).
In practical applications, the maximum flow rate is often much lower than the upper limit value of the instrument, and with changes in load, the minimum flow rate is often lower than the lower limit value of the instrument. The instrument does not work in its working section. To solve this problem, it is usually used to reduce the diameter at the measuring point to increase the flow rate at the measuring point, and smaller diameter instruments are selected to facilitate the measurement of the instrument. However, this diameter changing method requires a straight pipe section with a length of 15D or more between the reducer and the instrument for rectification, which makes processing and installation inconvenient. The LGZ variable diameter rectifier with a curved longitudinal section has multiple functions such as rectification, increasing flow velocity, and changing flow velocity distribution. Its structural size is small, only one-third of the inner diameter of the process pipe, and it is integrated with the vortex flowmeter. It not only does not require an additional straight pipe section, but also reduces the requirements for the straight pipe section of the process pipe, making installation very convenient.
For the convenience of use, the battery powered local display vortex flowmeter adopts micro power consumption technology. It can operate continuously for more than a year with lithium battery power supply, saving the procurement and installation costs of cables and display instruments. It can display instantaneous flow, cumulative flow, etc. on site. The temperature compensated integrated vortex flowmeter also comes with a temperature sensor, which can directly measure the temperature of saturated steam and calculate the pressure, thereby displaying the mass flow rate of saturated steam. The temperature pressure compensation integrated type is equipped with temperature and pressure sensors, which can directly measure the temperature and pressure of the gas medium for gas flow measurement, thereby displaying the standard volume flow rate of the gas.
Measurement medium: gas, liquid, vapor
◆ Caliber specifications: Flange card mounted caliber selection: 25, 32, 50, 80, 100
◆ Flange connection type with a diameter selection of 100, 150, 200
◆ Flow measurement range Normal measurement flow velocity range Reynolds number 1.5 × 104~4 × 106; Gas velocity of 5-50m/s; Liquid 0.5-7m/s
The normal measurement range for liquid and gas flow is shown in Table 2; The steam flow range is shown in Table 3
Measurement accuracy level 1.0 and 1.5
◆ Temperature of the tested medium: normal temperature -25 ℃~100 ℃
◆ High temperature -25 ℃~150 ℃ -25 ℃~250 ℃
Output signal pulse voltage output signal high level 8-10V low level 0.7-1.3V
The pulse duty cycle is about 50%, and the transmission distance is 100m
Pulse current remote transmission signal 4-20 mA, transmission distance of 1000m
◆ Instrument operating environment temperature: -25 ℃~+55 ℃ humidity: 5-90% RH50 ℃
◆ Material: Stainless steel, aluminum alloy
◆ Power supply DC24V or lithium battery 3.6V
Explosion proof grade: EXdbIICT6Gb
Protection level IP65
The vortex flowmeter series products include: plug-in vortex flowmeter; Gas vortex flowmeter; Steam vortex flowmeter; Integrated vortex flowmeter with temperature and pressure compensation
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