Nozzle flowmeterProduct features:A nozzle flowmeter is a differential pressure generating device for measuring flow rate, which can be used in conjunction with various differential pressure gauges or transmitters to measure the flow rate of various fluids in pipelines. The standard nozzle throttling device is used in conjunction with differential pressure transmitters to measure the flow rates of liquids, vapors, and gases, and is widely used in sectors such as petroleum, chemical, metallurgical, power, and light industry.
The nozzle flowmeter includes two types: standard nozzle (ISA1932 nozzle) and long neck nozzle. Its design and manufacturing comply with the provisions of ISO 5167 or GB/T2624 standards.
Installation of nozzle flowmeter:The integrated installation consists of an intelligent display instrument (multi angle transmitter) and a nozzle device to form a nozzle flowmeter. It comes with * * differential pressure sensor, pressure sensor, and thermistor temperature sensor. The AW2003 intelligent display instrument (multi angle transmitter) not only automatically adapts within the range of the differential pressure sensor, but also calculates various compensation coefficients such as the outflow coefficient C and the beam expansion coefficient ε online, truly achieving the expansion of the range while ensuring the accuracy of measurement. Using a large LCD screen to display cumulative flow, instantaneous flow, instantaneous pressure, and instantaneous temperature values on the same screen, without the need for manual switching. 4-20mA two-wire instantaneous flow output. Divided into two categories: intrinsic safety explosion-proof products and ordinary products. The split type installation is composed of a vertical nozzle device, differential pressure, pressure, temperature transmitters, flow meters, globe valves, and other components. The connection combination between each part is completed by the user themselves.
Structure of nozzle flowmeter:·The standard nozzle consists of an inlet plane portion A perpendicular to the axis, an inlet contraction portion composed of arc-shaped curved surfaces B and C, a cylindrical throat E, and a protective groove F required to prevent edge damage. Its pressure tapping method is to use an angle joint for the upstream pressure tapping port, and a corner joint for the downstream pressure tapping port, which can be set according to the angle joint or located further downstream. Total length of nozzle
·When 0.30 ≤ β ≤ 2/3, nozzle length=0.6041d
·When 2/3 ≤ β ≤ 0.80, nozzle length=d
·The ISA 1932 nozzle is composed of a contraction section, a cylindrical throat, and a groove on the upstream surface determined by a plane perpendicular to the axis and two circular arcs. The pressure tapping method of ISA 1932 nozzle is only corner tapping.
·The upstream surface of a long diameter nozzle is composed of a plane perpendicular to the axis, a contraction section with a 1/4 elliptical shape, a cylindrical throat, and possibly grooves or oblique angles. The pressure measurement method for long diameter nozzles is only D-D/2.