Metal tube rotameter

Productoverview:

ZW-LZ series Metal tube rotameter Is a variable area flow meter based on float position measurement. The concept of full metal structure, Modular design, because of its small volume, small pressure loss, large measuring range ratio (10:1), easy installation and maintenance, it is widely used in various industries complex, harsh environment, small volume and low velocity, a variety of harsh medium conditions of traffic measurement and process control.

A series of products of metal tube flowmeter, 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 control alarm output type, type classification; according to the requirements of proof, and can be divided into common type, intrinsically safe explosion-proof type three, isolation.

Using magnetic sensor, magnetic field change detection angle without contact with the international advanced Motorola micro processing system, can realize the liquid crystal indicator, and cumulative output distance (4 ~ 20mA), pulse output, alarm output function, the intelligent signal transmitting apparatus and has a high accuracy and reliability, completely it can replace the imported same type instrument, and has high cost performance, multi parameter calibration, power down protection etc..

Design of metal tube flowmeter production also takes into account the user requirements process flows, vertical installation, upper lower mounted, side into the side mounted, the bottom side of the installation type, thread connection type, horizontal mounted installation optional.

Second, working principle:

ZW-LZ series of 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 flow velocities decreased immediately, float on the lower differential pressure 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, the type of flow meter:

According to the fluid entrance and exit direction will be divided into 5 types of products: 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 etc..

Horizontal mounting type flowmeter when the diameter is less than DN50 (inclusive), using T structure, when more than DN50, the spring structure.

Flow connection specification: LZ series metal tube type flowmeter standard 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.

Four, application:

ZW-LZ series of metal tube rotameter is the industrial automation process control used in a variable area flow meter. It has the advantages of small volume, large detection range, 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. Widely used in petroleum, chemical, power, pharmaceutical, food, water treatment and other complex, harsh environmental conditions, the flow measurement process and various medium conditions in.

Five, main features:

1, all metal structure design, strong, simple, high pressure resistance, high temperature resistance, corrosion resistance, long service life;

2, a short trip, the total height of 250mm, easy to install;

3, mechanical pointer instructions LCD liquid crystal display instantaneous flow, instantaneous flow, cumulative flow;

4, intelligent indicator, using foreign signal processing chip, modular design, no hysteresis;

5, data recovery, data backup, power down protection and fault self diagnosis function;

6, HART type indicator, two-wire 24VDC power supply, 4-20mA standard current signal output of HART protocol stack;

7, through the HART communication manipulator configuration and parameters can be adjusted;

8, with the PC serial connection, through the Windows program, to achieve on-site calibration of the instrument;

9, can be used in flammable and explosive occasions;

10, vertical and horizontal, upper lower, bottom side, side into the side such as the installation of a variety of forms, flange or threaded connection.

Six, technical parameters:

1, water measuring range: 2.5 ~ 100000l/h (20 C);

2, range: 10:1;

3, 1, 1.5, accuracy: 2.5

4, working pressure: DN15, DN25, DN50 PN4.0MPazui 10.0MPa, DN80 DN100, PN1.6MPazui 6.4MPa;

5, medium temperature: -40 to 300 DEG c;

6, medium viscosity: DN15: <5mPa - s eta (F15.1 ~ F15.3); s (F15.4 <30mPa F15.8);

DN25: <250mPa - s.

DN50: <300mPa - S - DN150;

7, the ambient temperature: LCD type: -40 to 85 DEG C; pointer type: -40 to 120 DEG c;

8, connection: flange (executive standard DIN2501 or as required by standard flange manufacturing)

9 meter height: 250mm

10, cable interface: M20*1.5

11, power supply: 24VDC two-wire 4 ~ 20mA or 85 ~ 265VAC 50/60Hz (remote type)

12, alarm output: alarm relay output lower or upper instantaneous flow (Zui contact capacity 5A-250VAC) or open collector output (Z 100mA-30VDC 100 internal impedance).

13, the cumulative output pulse: pulse output, Zui interval of every 10 seconds a pulse (AC) or a pulse every 50 milliseconds.

14, double liquid crystal display: LCD display, display the instantaneous flow and cumulative flow.

15: Exia II CT4, explosion-proof.

16, the measuring tube material: 316 stainless steel (common type) or Teflon liner (corrosion type).

Seventh, 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.

Eight, 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.

Jacket structure size FA standard flow meter, flange type flowmeter.

4, high pressure type structure (Y type)

High pressure type structure for media pressure is greater than the standard pressure level measurement. At present, Zui high 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 Zui high pressure 10MPa.

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, Z 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.

Troubleshooting ten fault:

1, check the alarm set value size SU.

2, check the deviation set D value can not be too large.

3, FUN function, logic function is correct. HA-A said the upper limit is logical. LA-A said the lower limit is.

4, circuit board failure, replace the board.

5, if the lcd barcode indicates the correct output, no action, the cathode can check the external power and external power supply is connected with the anode of instrument power supply.

If the wobble in use, according to the jitter amplitude to determine what kind of amplitude jitter. Divided into mild and moderate jitter jitter jitter and jitter.

1, a slight jitter due to fluctuations caused by the media. Can be used to increase the damping of the way to overcome.

2: general, moderate jitter caused by medium flow state. For general gas as the medium pressure instability caused by.The regulator or stabilizer to overcome or increase the damping of gas meter.

3, severe jitter: mainly due to medium gas pulsation, operation pressure instability or give users pressure, temperature, flow meter and the actual state does not have large differences over range instrument.

Eleven, the installation should follow the following steps:

1, before installation 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;

The upstream and downstream pipeline 4, instrument and 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 ensure that the instrument is 5 times the nominal diameter, downstream straight pipe length not less than H2 250mm;

5, due to the use of 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;

6 before installation, instrumentation, piping should be purged, 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.

Twelve, installation notes:

1. before installation, pipeline sweeping shall be carried out to prevent impurities, damage the instrument. In order to ensure the normal use of the instrument, the recommended magnetic filter installed in the instrument entrance;

2. measurement easily crystallized medium should be used with jacket type heat;

3. installed horizontally or vertically when the inclination angle of not more than 2 degrees;

4. measuring pipe is not allowed in a magnetic material;

5. on the downstream piping should be the same with the meter diameter, try to ensure the front 5 times diameter length, diameter 2 times the length of the back;

6. meter anticorrosive PTFE lining, the installation can not overexert, so as not to damage the PTFE lining;

To avoid the stress of the 7. meter is installed, pay attention to eliminating external interference;

8. meter with liquid crystal display to avoid direct sunlight, so as not to affect the service life of the flowmeter;

The float flowmeter in the pipeline at the end of the metal tube 9. for installation, should be installed in the valve flow back, to increase the pressure, to avoid the phenomenon of a low flow meter reading.

13, measuring range and pressure loss:

Fourteen, the selection of encoding:

Fifteen, design selection and ordering information:

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

2, please provide the 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.