Product
FLOW NOZZLE
Flow nozzle is to be installed in a pipe line. While a fluid is flowing through this pipe line due to the nozzle a pressure difference is generated. From the value of this pressure difference, which can be measured by a differential pressure transmitter, the flow rate can be calculated.
Flow nozzles are designed to work with high pressure and high temperature applications. Their construction is more rugged than orifices. They allow the flow of more than 60 percent greater volume than orifices do. They are less sensible against solid particles in the fluid. Also, they are applicable for high-speed flowing fluids.
Types:
- Long Radius Flow Nozzle: This type of flow nozzle is mainly used when low permanent pressure loss is desired and high operating pressure and high operating temperatures are involved. There are two types of long radius nozzles: High Beta nozzles (0,25 ≤ β ≤ 0,8) and Low-Beta nozzles (0,20 ≤ β ≤ 0,5). Long Radius Nozzles have a smooth elliptical inlet leading to a throat section with sharp outlet. The length of the Long Radius Nozzle depends on the Beta-Ratio. The Long Radius Nozzle is achieved as complete meter run with a weld-in unit or pin type which depend on the design pressure and temperature. The Long Radius Flow Nozzle upstream & downstream tap are manufactured according to relevant standards. the end connection of it can be supplied both in flange or butt-welded type.
The special features of this product include long service life, Impact resistance, small pressure loss, large measurement range.
- ISA 1932 Flow Nozzle: ISA 1932 nozzles are generally used for the measurement of liquid or gas flows including steam, erosive, high-velocity and non-viscous media. They do not rely on a sharp edge (which can deteriorate over time) to maintain accuracy and therefore offer excellent long-term accuracy with less wear, reducing the possibility of distortion. They are often used for high accuracy flow measurement in power plant applications. The ISA 1932 flow Nozzle is precision machined flow element as per various International Standards have a smooth centrical inlet leading to a throat section with sharp outlet. The length of the ISA Nozzle depends on the Beta-Ratio. Typically, nozzles have a large capacity and well accuracy with high velocity flows. The required straight inlet section is much less than an orifice and the discharge coefficient of the nozzle is such that a nozzle can measure approximately 55% higher flow rates than an orifice plate with a similar beta ratio and design differential pressure.
The special features of this product include extended product life with no moving parts, Lower susceptibility to erosion, widely used for high pressure and/or high temperature steam and water flow, Useful for flow measurement at high velocities Turndown ratio of 10:1, 20:1, 50:1 and greater can be achieved depending on the specific model and design of the meter as well as the type of secondary instrumentation system utilized, Repeatability of ± 0.1%
-Venturi Nozzle: The Venturi Nozzle is a hybrid device having an inlet, convergent section identical to the ISA 1932 nozzle and an outlet, divergent section similar to a Venturi tube flowmeter. This results in a unique location for the low pressure tap in the throat. This design has a lower pressure loss than the ISA 1932 nozzle and the long radius nozzle.
They are generally used for the measurement of liquid or gas flows including steam, erosive, high-velocity and non-viscous media. They do not rely on a sharp edge (which can deteriorate over time) to maintain accuracy and therefore offer excellent long-term accuracy with less wear, reducing the possibility of distortion. They are often used for high accuracy flow measurement in power plant applications.
The special features of this product include suitability for liquid, gas and steam flow measurement, Optimum solution for measuring the flow of steam, Accuracy ≤ ±0.1 % of actual flow rate, Repeatability of measurement 0.1 %, Lowest pressure loss in the family of primary flow elements.
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