Micro metal tube rotameter

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ZW-LZZW series Micro metal tube rotameter Is a variable area flow meter based on float position meas…

Productoverview:

ZW-LZZW series Micro metal tube rotameter Is a variable area flow meter based on float position measurement. The new design of the small flow rate measurement is possible. Especially suitable for the measurement of liquid and gas micro flow. The metal structure, has the advantages of small volume, small pressure loss, large measuring range ratio (10:1), used in various industries complex, harsh environment, small volume and low velocity, a variety of harsh medium conditions of the flow measurement and process control, especially suitable for the measurement of turbidity, opaque or corrosive fluid. According to the needs of different users and different occasions, there are a variety of measurement for user selectable; according to the output form of a local indication, remote output type classification; according to the requirements of proof, and can be divided into common type, intrinsically safe type two.

Two, work principle:

ZW-LZZW series of micro 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-LZZW series of micro metal tube rotameter is widely used in petroleum, chemical, power, pharmaceutical, food, water treatment, etc.. The complex, harsh environmental conditions, the flow measurement process and various medium conditions in.

Four, main features:

1, all metal structure, strong stability, suitable for high temperature and high pressure, strong corrosive medium.

2, using the isolation design, imported relay output, to ensure reliable operation.

In 3, the industry measurement of gas and liquid, the measuring part can be using different materials to adapt to various medium conditions.

4, the vertical and horizontal installation, more suitable for different occasions.

5, the magnetic coupling structure to ensure data transmission, more stable signal.

6, magnetic filter, with thermal insulation or jacket design.

7, the vertical and horizontal installation, more suitable for different occasions.

8, can be used in flammable and explosive occasions.

Fifth, technical parameters:

1. measuring range: water (20 C) (0.3 ~ 100) L/h; air (20 degrees 101325Pa) (1.2 ~ 3400) L/h;

2. range: 10:1;

3. accuracy level: 4

4. working pressure: 2.5MPa (according to the need of increase)

5. medium temperature: -80 ~ +150 C

6. environment temperature: -25 ~ +65 C

7. connection: 1/4 "NPT thread or phi 6 (phi 8) sleeve connection / vertical connection according to the level of user requirements

8. limit alarm: 1~2 alarm switch (optional)

9. dimensions: overall size: 110mm; installation center distance: 90mm;

Six, 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.

Seven, the installation should follow the following steps:

1, before installing the instrument to process piping, should remove all installed and checked for any transport damage;

2, in order to prevent in transit, with a rubber band fixed pointer indicator, indicator should open the left cover it gently removed before connection, do not change the pointer position;

3, open the indicator of the right cover, cable through the cable introducing device, according to the wiring diagram wiring rotation transmitter, pressure screw nut, the cable is fixed, and then tighten the fastening screws around the cover, the indicator of waterproof and dustproof;

4, upstream and downstream piping and instrument instrument should be the same caliber, flange or threaded connection should be matched with the flange and screw instrument, instrument upstream straight pipe length should be 5 times the nominal diameter of the instrument, the downstream straight pipe length not less than H2 250mm;

5, the instrument measuring mechanism is magnetic transfer, so in order to ensure the performance of rotameter installed around the sensor, at least 100mm, the existence of ferromagnetic material is not allowed;

Before installation, 6 meter pipeline sweeping shall be carried out, to prevent the retention of ferromagnetic material in the pipeline is attached to the instrument, the instrument performance, or even damage the instrument. If unavoidable, should be installed at the entrance of the magnetic filter instrument;

7, the measurement of gas meter is calibrated in special pressure, if the gas meter in the outlet directly discharged into the atmosphere, will produce a pressure drop in the float, and lead to data distortion. If this is the working conditions, should install a valve in the instrument exports, so that the required flow value is set, when the float to maintain calibration pressure, gas expansion in valve;

The installation form 8, instrument installation for vertical and horizontal installation, if it is installed in a vertical straight form, should ensure that the instrument is better than 1%; if the level of installation form should ensure that the level of instrument is better than 1%;

9, installed in the pipeline in the instrument should not be subject to stresses, the instrument should be a proper entrance and exit pipe support, can make the instrument in z stress state;

10, product and computer related to calibration and other operations, must be in a safe place.

Eight, installation notes:

In 1, before the first installation flowmeter in the pipeline, dirt, impurities such as welding blowing clean, if the liquid contained solid impurities, should the corresponding filter is installed between the valve and the straight pipe.

2, shielding and grounding system: in order to ensure ideal electromagnetic compatibility, shielding and grounding is very important, especially the bus cable, cable as far as possible to make continuous shielding.

3, the safety zone, according to the requirements of conventional cable grounding as much as possible.

4, in dangerous places, to ensure that the whole range of bus safe places and dangerous enough, all the potential, in this case, multiple ground is very superior.

Nine, the measurement range and pressure loss:

Ten, the selection of encoding:

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.