Pointer type metal tube rotameter

Productoverview:

ZW-LZ series Pointer type metal tube rotameter Is a commonly used flow measuring instrument in the industrial automation process control, it has low pressure loss, large detection range (range 10:1), easy to use, it can be used to measure the liquid, gas and steam flow, especially suitable for medium and small flow and low velocity flow measurement. Metal rotameter has local display and intelligent remote type, with a pointer display, instantaneous flow, cumulative flow, liquid crystal display, alarm output, pulse output, standard two-wire 4-20mA current output and other forms, provides a very broad space for the user to choose.

Second, working principle:

ZW-LZ series of pointer type metal tube rotameter is the medium to be measured through a conical measuring tube float from upper and lower ends of the differential pressure generated form the upward force, when the float was immersed in a fluid on the lift is greater than the weight of the float, the float will rise, annulus area increases, the annulus fluid velocity decreased immediately float the lower end of the differential pressure is reduced, to float upward force also decreases with, until the lift is equal to the weight of the float when immersed in a fluid, the float will stabilize at a certain height. The float position that corresponds to the size of the measured medium flow. A built-in magnet, the float with the medium moves up and down, with the movement of the float magnetic field changes.

A, for in situ, by rotary magnetic float and the local indicator in the inner magnetic coupling, rotate, and drives the pointer, through the dial indicates the size of the flow.

B, the intelligent, by a solid state magnetic sensor intelligent indicator in the magnetic field will change into electrical signal output by A/D transform, D/A microprocessor, LCD liquid crystal display to show the size and cumulative flow flow.

Three, application:

ZW-LZ series of pointer type metal tube rotameter is suitable for small flow, low Reynolds number of medium flow measurement is widely used in food, chemical, petroleum, metallurgy, electric power, environmental protection, medicine and light industry and other departments of the liquid flow measurement and automatic control.

Four, main features:

1, suitable for small diameter and low flow velocity medium measurement;

2, reliable operation, low maintenance, long service life;

3, for the straight pipe is not high, wide flow ratio 10:1

4, two large LCD display, optional field instantaneous / total flow rate display, with backlight;

5, single axis sensitive indicator;

6, all metal structure, suitable for high temperature, high pressure and strong corrosive medium;

7, can be used in flammable and explosive occasions.

Five, technical parameters:

1, measuring range: water (20 C): 1-200000I/h; air (20 C) 0.1.13Mpa 0.03~4000m3/h;

2, range: Standard Type: 10:1; special type: 20:1;

3, accuracy: Standard Type: 1.5; special type: 1.0;

4, pressure rating:

Standard type: 4.0Mpa 1.6Mpa DN80DN200 DN15DN50;

Special type: 25Mpa 16Mpa DN80DN200 DN15DN50;

5, pressure loss: 7Kpa ~ 70Kpa;

6, medium temperature: Standard Type: -40 to 100 DEG C; high temperature: 100 to 450 DEG c;

7, medium viscosity:

DN15:n<5mPa.s (F15.1-F15.3) n<30mPa.s (F15.4-F15.8);

DN25:n<30mPa.s;

8, the ambient temperature: the remote type: 40 to 185 DEG C (LCD LCD is not damaged) work in -30 to 80 DEG c;

9, connection type: Standard Type: DN201 standard flange; special type: specified by the user in any standard flange or thread;

10, cable interface: flameproof type 1/2NPT internal thread, thread in the other M20`1.5;

11, power supply:

Standard type: 24VDC two-wire 4-20mA (12VCD-32VCD;

Alarm type: 24VDC three wire 4-20mA (18VCD-28VCD;

AC: 85-265VCD 50Hz;

Battery type: 3.6V, 7.5AH lithium battery, can be used continuously for three years;

12, load characteristics:

Two-wire system: Rlmax=50 (-12) =600,24V;

Alarm type: the load resistance is 200, AC type: the load resistance is 200;

13, alarm output: the lower or upper limit of instantaneous flow alarm switch; alarm relay output;

14, the liquid crystal display: instantaneous flow display value range: 0-50000 (with a decimal point);

15, protection grade: IP65.

Six, structure classification:

1, the high temperature structure (G type)

High temperature structure type (G type) is used for medium temperature is too high or too low and the need to take measures on the insulation of the measuring tube medium flow measurement. The high temperature structure is increased and the distance between the measuring tube indicator to increase heat dissipation and increase the insulation thickness, ensure the working environment temperature indicator in the allowable range. The selection of the "G" type.

The flow of G type metal tube flowmeter can measure the temperature of -80 DEG -+300 DEG medium.

The structure of 2, with a damper device (Z type)

Damper structure type flowmeter for entrance flow (pressure) medium flow measurement is unstable, especially for gas measurement.

3, jacket type structure (T type)

Jacket structure for heating or cooling of needs (such as high viscosity and flow measurement of the medium Yi Jiejing).In the jacket by heating or cooling medium, the fluid does not vaporize and crystallization.

Import and export with thermal medium connection standard to use HG20594-97 DN15 PN1.6 flange, flange connection and other specifications may be marked with production plant, pressure rating jacket for 1.6MPa.

4, high pressure type structure (Y type)

High pressure type structure for media pressure is greater than the standard pressure level measurement. At present, Z pressure can reach 32MPa. In addition high pressure type flowmeter can provide built-in magnetic filter type, installation height is 350mm. FA, FB and FC type pressure 10MPa.

Seven, the type of flow meter:

1, the metal tube flowmeter will 5 types of products according to the fluid into the entrance and exit direction: vertical type, horizontal type (including the level T, level of spring type), into the side of the bottom and side into the side, side in the type, and each type and standard type, high temperature type, jacket type etc..

2, the level of the installation type meter when the diameter is less than DN50 (inclusive), using T structure, when more than DN50, the spring structure.

3, specifications: standard type flowmeter is connected with GB/T9119-2000 standard flange, flange standard can be made according to customer demand; also can be used threaded connection, clamp connections.

Magnetic filter:

If there is a ferromagnetic particle medium, magnetic filter installed in the entrance before the flowmeter.

Eight, conversion indicator:

The converter is actually the height conversion taper pipe float into the corresponding volume scale. From the output signal: local display and remote signal output type:

1, local display type: by in situ indicator in the follow-up magnetic float and the inner magnetic coupling, and rotate, and the electric pointer by dial indicating the flow

2, intelligent remote type, by the intelligent indicator in the follow-up magnetic float and the inner magnetic coupling, rotate, and drives the magnet and the sensing pointer through a magnetic sensor magnetic field change into electrical signals by A/D conversion, digital filter, D/ microprocessor, A output, LCD liquid crystal display, to show the instantaneous flow and cumulative flow rate.

Nine, product maintenance:

1, in the process of long-term use, the pipeline inevitably there will be ferromagnetic impurity adsorption on the float, it will float stuck or affect the measurement accuracy, from time to time to clean the sensor float; if the installation of magnetic filters should be cleaned regularly.

2, the instrument indicator with electronic components, instrument wiring or demolition of housing, to housing screws, must ensure sealing, prevent impurities, or other material into the water, and also to ensure reliable earthing of the meter casing.

3, the instrument is installed, in use, should pay attention to:

When the valve is opened to avoid the formation of pressure shock makes the float slamming limiting device, causing damage to the instrument, slowly open the valve!

The measurement of gas meter is equipped with gas damper, Zui to decrease the float concussion; to ensure the stability of the float, a throttle valve can be installed in the instrument export.

4, for the remote type instrument, we must first ensure that the instrument wiring correctly, keeps power; for dangerous situations, must choose the explosion-proof, and the installation and use of proof required by the.

Ten, installation notes.

Remove the filler, 1 meter box after check, the meter should be installed vertically in the pipeline without vibration, such as to the level of the installation, the order should be additional instructions. The angle between the line and the plumb line flowmeter center should not exceed 5 degrees.

In 2, the newly installed pipeline flow meter should be installed before the new pipeline clean metal pipe, if the measured medium containing impurity particles or bubbles, you should install filtering device or exhaust in flowmeter installation, the fluid must be flowing from down to up, if the fluid from top to bottom, it can't work flow. If the measured medium is pulsating flow, it should be appropriate to the size of the buffer device is arranged in the downstream, such as surge tank to eliminate pulsation.

3, in order to check the meter zero and disassembly and maintenance and debugging, should stop valve and bypass valve installed in the upstream and downstream flow meter.

4, an instrument according to the provisions after installation, should close the flow meter on the downstream shut-off valve, check again with the two meter instrument wiring, error free, open the two meter power supply is the instantaneous flow rate should be zero. For normal use, you should first open the upstream valve is fully open, with a metal tube rotameter downstream valve from slowly adjust the flow, instantaneous flow should change. Stop working when they should close the valve, then close the upstream downstream of the valve.

Eleven, the measuring range and the pressure loss:

Twelve, the selection of encoding:

Thirteen, design selection and ordering information:

1, please provide the pipe size, wall thickness, material requirements and accuracy requirements;

2, please provide a liquid or gas, such as the name, commonly used commonly used temperature, working pressure, common flow, density, viscosity etc.;

3, choose anti-corrosion type, should indicate the measured corrosion and concentration etc.;

4, if there are special to show, please contact our sales department.

Customer service service commitment:

1, our series of metal tube flowmeter series product quality problems within twelve months, responsible for free maintenance.

2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.

3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.

4, after the warranty period of product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.

5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.