Thread link target flowmeter

Products overview:

ZW series of BSL type screw thread connection target flowmeter is based on the traditional target flowmeter isolation diaphragm, the new strain sensor is applied to the target flowmeter, at the same time, using the latest digital technology and microelectronic technology, the sensor will detect the signal processing into is proportional to the flow rate of 4 ~ 20 ma output signal, and through the double row big liquid crystal display instantaneous flow and cumulative flow at the same time, the traditional target flowmeter no matter on the structure and performance has improved significantly.

Second, the structure and working principle:

1, structure,

ZW series of BSL type screw thread connection target flowmeter is mainly composed of measuring tube (shell), new sensors (including choke element), integrating display and output parts.According to the different medium and condition, must choose appropriate sensors, therefore, provide accurate object and parameter measurement, and manufacturers to choose appropriate sensor is the key of the products can be accurate measurement.

2, working principle

ZW - BSL series type screw thread connection target flowmeter is when the media in the measurement of pipe flow, because of its kinetic energy and target plate pressure difference, and produce on the target plate force, make the target board of trace amounts of displacement, the force is proportional to the square of the velocity with the media, the size of the target plate force of the target bar transfer, make the sensor elastomer produces trace changes, thereby breaking patches of capacitance bridge balance.Generation and corresponding voltage signal flow force on the target board: by the fluid flow characteristics, the influence of flow rate and is proportional to the square of the voltage produced by the bridge.Its mathematical expression is as follows:

CdA rho/V2 / F = 2

Type: F choke a force (kg) of

Drag coefficient Cd object

A choke pieces on the measuring tube axial projection area (was)

Rho conditions of medium density (kg/m3)

V medium in the measuring tube average flow velocity (m/s)

Choke (target) accept force F, the rigid connection of transfer (rod) to the sensor, the sensor produces voltage signal output: V = KF

Type: V - sensor output voltage (mV), K - proportionality constant, F - choke piece (target) by force (kg),

The voltage signal after preamplifier, AD conversion and computer treatment, obtains the corresponding instantaneous flow and cumulative total.

Three, the application of medium:

1, gas:

Gas, air, hydrogen, natural gas, nitrogen gas, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine, etc.

2, liquid class:

Heavy fuel oil, paraffin, asphalt, sulfuric acid, edible oil, residue, acetone, diesel oil, mine water, detergent, soy sauce, gasoline, silicone oil, syrup, solvents, perfume, the water of the sea, aviation kerosene, ketone of soap water, glucose, oleic acid, salt water, paste, ink, coolant, ethylene glycol, mineral oil, liquid sugar, hydrochloric acid, auto paint, resin, butter, canola oil, liquid oxygen, shampoo, toothpaste, gel, fuel oil, milk, bleach, regulator, soda, additives, detergent, alkali, ammonia, bunker oil, chemical reagents, kerosene, glycerin, dyes, water, nitrate, high boiling point of organic solution, lard, additives, alcohol, oil, ethylene, polypropylene, such as a stupid.

Four, the main features:

1, have no moving parts, in the design of the whole station instrument in the insert structure, convenient disassembly;

2, can choose a variety of corrosion and high temperature resistant material (such as alloy, titanium, etc.);

3, the machine can make the whole sealing no dead Angle (welding), no leak, resistant to 42 mpa pressure;

4, instrument with self-checking program, failure phenomenon be clear at a glance;

5, sensors, not contact with the measured medium, there is no parts wear, use secure and reliable;

6, can be used on-site dry calibration method, hang heavy weights method is adopted.A single bond operation can complete calibration;

Select 7, has many installation modes, such as choosing the online plug-in installation cost is low;

8, with the integration of temperature and pressure compensation, direct output quality or the party;

9, with optional small signal excision, nonlinear correction, filtering time can choose;

10, can accurately measure all kinds of room temperature, working condition of high temperature, low temperature of 500 degrees - 200 degrees, the gas and liquid flow;

11, accurate measurement, the accuracy can reach 0.2%;

12, good repeatability, average of 0.05 ~ 0.08%, and quickly;

13, the pressure loss is small, only about 1/2 delta P standard orifice plate;

14, anti-interference, impurity resistance strong;

15, can according to the actual need to replace choke (target) and change the flow range;

16, low-power battery field shows that can direct reading online, value for display can be read at the same time instantaneous and cumulative flow rate and the percentage of stick figure;

17, simple and convenient installation, easy to maintenance;

18, multiple output form, can remote transmission parameters;

19, seismic resistance is strong, measurable pulsating flow within a certain range;

Five, the technical parameters:

1, the mouth diameter: DN6 ~ DN50mm target flowmeter available diameter (threaded);

2, nominal pressure: 0.6 ~ 42 mpa;

3, working temperature: 500 ℃ ~ + 200 ℃.

4, fine degree: + / - 0.2 ~ + / - 2.5% FS.

5, the amount than: ";

6, the shell body: carbon steel, 304 stainless steel (or consultation according to the requirements of customers;

7, mode of power supply: 3.6 VDC built-in lithium battery (two years in one, with no signal output);Outside for 24 VDC (with signal output);

8, the output signal: 4 ~ 20 ma two wire;Pulse 0 ~ 1000 hz;Hart communication;RS232 / RS485 (or consultation according to the requirements of customers;

9, protection level: IP65;IP67.

10, explosion-proof marks: this Ann model ExiallCT4;Flameproof ExdllCT4;

11, header display: cumulative flow;The instantaneous flow rate;Working temperature;Pressure working conditions (temperature, pressure compensation is);Stick full scale percentage;Breakdown self check.