Pitot tube flowmeter

NegotiableUpdate on 11/19

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Overview

Introduction: Pitot tube flowmeter Overview: Pitot tube flowmeter, also known as flute shaped averaging tube flowmeter and Toba tube flowmeter, belongs to differential pressure flowmeter. Used for measuring media such as air volume, water, steam, coal gas, flue gas, oxygen, nitrogen, hydrogen, etc. Accuracy: 1% FS

Product Details

Overview of Pitot Tube Flow Meter:

Pitot tube flowmeter, also known as flute shaped averaging tube flowmeter and toba tube flowmeter, belongs to differential pressure flowmeter. Used for measuring media such as air volume, water, steam, coal gas, flue gas, oxygen, nitrogen, hydrogen, etc

Accuracy: 1% FS, 0.5% F.

Characteristics of Pitot Tube Flow Meter

PitotTube, also known as PitotTube in English, is a tubular device used to measure the total and static pressure of a gas to determine its velocity. It was first invented by H. Pitot of France and was primarily used for measuring aircraft speed in its early days

The series of pitot tube flow meters based on the Long March instrument are a type of flow meter that calculates the velocity of gas by measuring the pressure at the sampling point, applying the Bernoulli theorem, and multiplying it by the cross-sectional area to calculate the flow rate

Measurement device. Suitable for measuring the wind speed of large-diameter ducts, it determines the flow rate by measuring the wind speed of the pipeline and the airflow velocity in the furnace flue through conversion. Used for scientific research, production, teaching, and environmental protection

As well as purification rooms, mine ventilation, and energy management departments, it has the characteristics of simple principles, simple structure, and low cost.

2、 Composition of Pitot Tube Flow Meter

Pitot tubes are generally composed of a primary flow blocking element (sensor), a transmitter, and a valve group. In special cases, they are also equipped with ball valves, online plug-in devices, purge valves, etc.

3、 Principle of Pitot Tube Flow Meter

The pitot tube flowmeter consists of a double layered metal tube bent at a right angle, with a full pressure hole facing the flow at the top and static pressure holes around the side walls. The sensor is inserted into the center of the pipeline,

Align the total pressure hole upstream of the fluid, and the difference between the total pressure and static pressure is the measured differential pressure at the center of the pipeline. The differential pressure transmitter is connected to the total pressure pipe and static pressure pipe at both ends, and the measured data is fitted according to the mathematical model

Curve, provide the corresponding flow value, and convert the corresponding flow signal into a standard 4-20mA signal through a differential pressure transmitter.

4、 Main characteristics of pitot tube flowmeter

1. Can measure multiple media

Suitable for measuring the pipe velocity of media such as steam, liquid, air, and gas, especially for measuring the wind speed of large-diameter air ducts. It has the characteristics of reliable principle, simple structure, and low cost, and is an ideal flow detection supporting instrument for industrial boiler gas emission online monitoring system.

2. Optional online installation of plug-in, cleaning, and blowback devices

For some measuring points that cannot be stopped for installation, online plug-in devices can be used for online installation without stopping production; For media with excessive impurities or dirt, in order to prevent blockage of the pressure tapping hole, online plugging and unplugging devices can also be used for regular cleaning or online blowback devices can be used for blowback

3. Central pressure measurement, intrinsic anti blocking

The sensor is located at the center of the pipeline for pressure measurement, which is inherently anti blocking. It can be equipped with a cleaning rod to achieve online automatic cleaning, and the anti blocking effect is better.

4. Low installation cost, basically maintenance free

The plug-in installation method is simple to install, and with the unique wear-resistant coating on the top of the sensor, the shape of the sensor can remain unchanged for a long time, thus ensuring long-term stability.