Robust Structure Pitot Tube Flowmeter Stainless Steel Differential Pressure Flow

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Measurement Principle	Differential Pressure
Applicable Fluids	Liquids, Gases, Steam
Response Time	Instantaneous
Material	Stainless Steel
Pressure Rating	Class 150 to Class 2500
Standards Compliance	ISO 5167, ASME MFC-3M
Installation Orientation	Horizontal or Vertical
Operating Temperature	-40°C to 400°C
Accuracy	±1.5%
Output Signal	Differential Pressure
Name	Orifice Plate Flowmeter
Payment Terms	T/T,D/P,D/A,L/C
Supply Ability	100PCS/Month
Delivery Time	5-8 work days
Packaging Details	Carton
Brand Name	QINWEIYB
Model Number	QWLU-GB111
Place of Origin	China

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Product Specification


Measurement Principle	Differential Pressure	Applicable Fluids	Liquids, Gases, Steam
Response Time	Instantaneous	Material	Stainless Steel
Pressure Rating	Class 150 to Class 2500	Standards Compliance	ISO 5167, ASME MFC-3M
Installation Orientation	Horizontal or Vertical	Operating Temperature	-40°C to 400°C
Accuracy	±1.5%	Output Signal	Differential Pressure
Name	Orifice Plate Flowmeter	Payment Terms	T/T,D/P,D/A,L/C
Supply Ability	100PCS/Month	Delivery Time	5-8 work days
Packaging Details	Carton	Brand Name	QINWEIYB
Model Number	QWLU-GB111	Place of Origin	China
High Light	Robust Structure Pitot Tube Flowmeter ，SS Differential Pressure Flowmeter ，Stainless Steel Differential Pressure Flow Meter

Permanent Pressure Loss Minimal Average Velocity Tube Flowmeter

The permanent pressure loss of the constant velocity tube flowmeter is extremely small. By using a detection rod (constant velocity tube) inserted transversely into the pipeline, the fluid pressure at multiple points on the cross-section of the pipeline is measured simultaneously, thereby obtaining the average flow velocity of that cross-section and subsequently calculating the flow rate.

Outstanding Advantages

Minimal Permanent Pressure Loss (Energy Saving King): This is its most prominent feature. Due to the small cross-section of the detection rod, it offers minimal resistance to the fluid, resulting in a permanent pressure loss of only 2% to 5% of the differential pressure value, which is far lower than the 40% to 80% of orifice plates. The long-term energy-saving effect is significant.
Easy Installation: Only a hole needs to be drilled in the pipe, and then it can be inserted for welding or flange connection. No pipe cutting is required, making it particularly suitable for the installation and renovation of large-diameter pipes (DN200 and above) at a very low cost.
Robust Structure, Maintenance-Free: With no moving parts and a streamlined design, it is less prone to fouling and clogging (compared to orifice plates), ensuring high reliability.
Wide Rangeability: Typically, it can reach 10:1, which is superior to the 3:1 of orifice plates, making it suitable for applications with significant flow variations.
Wide Applicability: It can measure gases, liquids, and steam, and is especially suitable for large air volumes, large pipe diameters, and low-pressure gases (such as flue gas, air conditioning supply air).

Typical application scenarios:

Energy industry: Airflow measurement for power plant supply air, primary air, secondary air, and flue gas.
HVAC: Airflow measurement in supply and return air ducts of large air conditioning systems.
Petrochemical industry: Measurement of circulating water, air, and low-pressure gas in large-scale facilities.
Metallurgical industry: Measurement of blast furnace gas, coke oven gas, and combustion-supporting air.

Summary of Comparison with Orifice Flowmeters

Characteristics	Annubar Flowmeter	Standard Orifice Flowmeter
Principle	Multi-point velocity measurement, average pressure tapping	Central throttling, edge pressure tapping
Structure	One rod, insertable	One plate, flange clamping
Pressure loss	Very low (~3% ΔP)	High (40%-80% ΔP)
Installation	Simple (single-point opening), suitable for large diameters	Complex (requires paired flanges, pipe cutting)
Straight pipe section requirement	Very long (20D upstream and 5D downstream)	Relatively long (10D upstream and 5D downstream)
Accuracy	Moderate (±1% to 2%)	Higher (±0.5% to 1%)
Range ratio	Relatively wide (10:1)	Relatively narrow (3:1)
Cost (for large diameters)	Low	High (high cost of flanges and plates)
Low flow performance	Poor (signal too weak)	Better

The Pitot tube flowmeter is a representative of the differential pressure flowmeter family that "wins by ingenuity".

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Manufacturer,Distributor/Wholesaler,Exporter 
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5 million-10 million
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Xi 'an Qinwei Instrument Factory (General Partnership Enterprise)
No. 143, Sanqiao Street, Xi'an City, Shaanxi Province, China
https://www.radarlevelgauges.com/

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