Target Flow Meter, Air/ Liquid, DN20-DN100

Good price DN20-DN100 target flow meter for air/liquid flow measurement, the use of chip-level capacitive force sensor, efficient anti-overload structure design, high viscosity, dirty media, easy to condense and easy to block, high temperature, low temperature, strong corrosion and other flow measurement difficulties in the working conditions have a good adaptability, widely used in petroleum, chemical industry, metallurgy, electric power, pharmaceutical, environmental protection, food and other fields. It is widely used in petroleum, chemical, metallurgy, power, pharmaceutical, environmental protection, food and other fields.

Specification

Flow Meter Flow Range

Dimension (unit: mm)

Display Details

Wiring Diagram

Installation

Note:

1. Normal temperature type, low temperature type, high temperature type flowmeter depending on the different conditions of horizontal, vertical or inverted installation (to the factory calibration sheet shall prevail).
2. Medium working temperature of +300 degrees above, the user should target flowmeter shell to take thermal insulation measures to prevent heat radiation damage to the head (head working temperature of -30 to +70 degrees), the same working temperature -100 degrees below the medium, but also to take anti-freezing measures.
3. In order to ensure accurate measurement of the flow meter, the requirement to set up before and after the straight section.
4. In order to ensure that the flow meter in the inspection and replacement does not affect the work of the system, should try to set up a bypass valve (3) and cut-off valve (1, 2).
5. Vertical installation can be used due to process requirements, the measured medium flow direction can be from the bottom to the top, or from the top to the bottom.
6. Flow meter caliber and the connected pipe caliber size as much as possible, in order to reduce the flow interference, resulting in measurement error.
7. Target flow meter shell must be reliably grounded, if no grounding conditions should be explained to the factory. 1, 2, 3 for the front and rear valves and bypass valves, respectively. 4 for the flowmeter, L>10D and L>5D for the front and rear of the length of the straight section, respectively, D is the nominal diameter of the pipe.

Application

Tips: Target flow meter working principle

When the medium in the measuring tube flow, because of its own kinetic energy through the flow stopper (target) when the size of the force is proportional to the square of the flow rate of the medium, the mathematical expression is as follows.

F = C_dAp · V²/2

In the formula:

• F -- flow resistance by the force (kg)
• C_d -- coefficient of resistance of the object
• A -- flow stopper on the measuring tube axial projection area (mm²)
• p -- the working condition of the medium density (kg/m²)
• V -- the average flow rate of the medium in the measuring tube (m/s)

The force F accepted by the flow stopper (target) is transmitted to the capacitive force sensor through the rigidly connected transfer member (measuring rod), and the capacitive force sensor generates a voltage signal output.

V=KF

In the formula:

• K -- constant of proportionality
• F -- resistor (target) by the force (kg)
• V -- capacitive force sensor output voltage (mV)

The voltage signal is amplified by the preamplifier, converted to AD and processed by the computer to obtain the corresponding instantaneous flow rate and cumulative total.