Nozzle Flow Sensor

The nozzle adopts the structure of circular arc contour,  so its pressure loss is small, the straight pipe length that nozzle installation requires is short, and the accuracy is high.

Product Description

Principle:

The design of nozzle is based on throttling principle of fluid dynamics. When the fluid pass the nozzle, the flow beam will contract, which make the flow velocity quicken, static pressure reduce, hence, the pressure difference is produced between the upstream and the downstream of the nozzle. The larger the flow rate is, the larger the produced pressure difference is. And the square root of the pressure difference is in direct proportion to the flow rate.

Structure Diagram:

 

structure diagram

Product Features:

● Simple structure,  stable and reliable performance
● Low pressure loss
● International standard adopted to calculate and process, test based on JJG640-94.
● High accuracy, good repeatability, stable outflow coefficient
● Flow measurement of liquid, gas or steam
● High temperature resistance, high pressure resistance and impact resistance

 

Technical Parameters:
Standard Nozzle
Applicable medium Steam with high temperature or high pressure, water, liquid, gas
Nominal diameter DN50 ~ DN500
Working pressure ≤ 42 Mpa
Working temperature -50 ~ 650℃
Pressure tapping Angle tapping
Mounting Flanged type, wafer type, welding type
Executive standard ISO 5167: GB / T2624
Accuracy ± 1.0%
Meter tube material Carbon steel,  Stainless steel
Nozzle material SS304, SS316

 

Long Neck Nozzle

Applicable medium Steam with high temperature or high pressure, water, liquid, gas
Nominal diameter DN50 ~ DN500
Working pressure ≤ 42 Mpa
Working temperature -50 ~ 650℃
Pressure tapping D-D/2 tapping
Mounting Flanged type, wafer type, welding type
Executive standard ISO 5167: GB / T2624
Accuracy ± 2.0%
Meter tube material Carbon steel,  Stainless steel
Nozzle material SS304, SS316

 

Installation and Using

1) Avoid the process pressure becoming negative pressure.
2) Prevent the nozzle’s flow field from the large motor, transformer.
3) Select the installation position which has no or slight vibration.
4) The location shall be easy grounding for the flow sensor.
5) Avoid the direct sunlight.
6) Avoid the environment where there is high concentrations of corrosive gas.
7) The requirement to the upstream / downstream straight pipe length specified in the calculation sheet shall be met.
8) The flow sensor can be installed on horizontal pipe, vertical pipe or inclined pipe, but the pipeline must be fully filled with the fluid.
9) The upstream / downstream straight pipe must be circular, the inner wall of pipeline shall be clean, no pits and deposit substance.
10) The installation of pressure tapping tube  shall be comply with the industry standard.
11) Installation diagram of nozzle flow sensor for gas fluid and steam fluid as follow:

installation diagram

 

Diagram of straight pipe length at upstream / downstream:

 

straight pipe requirement

 

 

 

FAQ

Answer : Please send your question or enquiry to our email: sales@hginstrument.com, we will forward the questions to the related engineer.

Answer :  Please communicate with the sales about the return procedure before returning product.

Answer :  The delivery time depends on the order quantity and product specification.  If the product’s specification is conventional ( not special ),  delivery time is 5 or 7 working days for order quantity ≤ 10 pieces;  delivery time is 2 or 3 working weeks for order quantity 15 ~ 30 pieces. 

Answer :  by Courier,  by Sea or by Air

Answer :  Yes,  Generally warranty is one year.

Answer :  From year 2015  to year 2021,  average annual sales is RMB 350 million ( about USD 54.7 million )

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