Tiny flow tube flow meter

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ZW - LZZW seriesTiny flow tube flow meterTo measure small flow of liquid or gas, after a junior type…

ZW - LZZW seriesTiny flow tube flow meterTo measure small flow of liquid or gas, after a junior type, on the bottom into the type, can be threaded, card sleeve or flange connection, you can choose to take needle valve (also can be placed in export) can be placed in the entrance, indicator can be on-site instructions, also can take 4 ~ 20 ma output + HART signal remote transmission indicator, also can have a NURMUR limit alarm signal.With a solid, stable and reliable and the characteristics of wide application, can be used to measure gas and liquid.Solid metal design to ensure the high pressure, high temperature resistance, withstand extreme environmental conditions.The position of the float a simulated via induction indicator shows the measured value.
Second, the structure and working principle: 
1, the structure: 
Is mainly composed of three parts: 
A, indicator (intelligent indicator, on-site indicator); 
B, float; 
C, tapered measuring room. 
2, how it works: 
ZW - LZZW seriesSmall flow of metal tube float flowmeter bottom-up measured medium by the conical float to the top and bottom side of the differential pressure measurement of a tube formed upward force, when the float upward force is greater than the baptism by float weight in the fluid, float up, clearance area increase, immediately drop the gaps in the fluid flow, float up and down the differential pressure is reduced, acting on the float upward force as well as to reduce, until the upward force equal to the float weight immersed in the fluid, the float is stable at a certain level.The discretion of the float position that corresponds to the size of the measured medium flow.Move up and down in float float the built-in magnet steel, medium, magnetic field changes with the movement of the float. 
Type a, for in situ by in situ indicator of the rotating magnet steel and the float inside the magnetic coupling, and turning, drives the pointer at the same time, through the dial indicates the size of the flow at this time. 
B, for intelligence, an intelligent indicator in the solid state magnetic sensor to the change of the magnetic field into electrical signals, after A/D conversion, microprocessor, D/A output, LCD liquid crystal display (LCD), to show the size of the flow rate and cumulative flow. 
Applications:

ZW - LZZW seriesTiny flow tube flow meter adopts the theory of variable area type, measuring unit is composed of a conical tube and float measuring, suitable for the measurement of liquid and gas, has the characteristics of strong, stable and wide scope of application.Instrument can be horizontal or vertical connections, one or two options alarm switch, is widely used in petroleum, chemical industry, steel, food, pharmaceutical and other medium pressure of small flow measurement and process monitoring.

Four, the main features:
1, all metal structure, strong stability, suitable for high temperature and high pressure, strong corrosive medium.
2, adopts full isolation design, imported from relay output, to ensure reliable operation.
3, in various industries of gas and liquid measurement, measurement part can use different material to adapt to different conditions of medium.
4, vertical, horizontal, all kinds of installation method is more suitable for different occasions.
5, magnetic coupling structure to ensure that the data transmission, signal is more stable.
6, add the magnetic filter, can design with insulation or jacket.
7, vertical, horizontal, all kinds of installation method is more suitable for different occasions.
Eight, can be used in inflammable and explosive dangerous places.
Five, the technical parameters:
1. The measuring range: water (20 ℃) (0.3 ~ 100 L/h);Air (20 ℃ 101325 pa) (1.2 ~ 3400 L/h);
2. The range than: 10:1;
3. The level of accuracy: 4
4. Zui big working pressure: 2.5 MPa (according to the need can increase)
5. Medium temperature: 80 ~ + 150 ℃
6. The environment temperature: - 25 ~ + 65 ℃
7. Connection mode: 1/4 "NPT threaded or Φ 6 (8) Φ card set of connection or horizontal/vertical connections according to the requirements of customers
8. Limit alarm: 1 ~ 2 alarm switch (optional)
Overall size: 9. Size: 110 mm;Install the center distance: 90 mm;
Six, product maintenance:
1, in the long-term use process, the pipe will inevitably have a ferromagnetic impurity adsorption on the float, it would float jammed or affect measurement accuracy, need to clean them often float inside the sensor;If the installation of magnetic filter, also want to make regular cleaning.
2, instrument indicator is equipped with electronic components, instrumentation connection or remove the shell and the screw to tighten, must ensure that shell sealing, to prevent impurities, or other material into the water, but also ensure the reliable earthing of the instrument housing.
3, meters installed, in * times when using, should pay attention to:
Open valve to avoid pressure impact spacing device to float against, causes the damage of instrument, must open the valve slowly!
Measuring gas meter is equipped air damper, zui to large extent reduce the oscillation of the float;In order to ensure the stability of float, and can be installed in the export of instrument a throttle valve.
4, for remote transmission type instrument, first of all to ensure the instrument connection right after, can live;For the dangerous situation, must choose explosion-proof type, use and install according to the requirements of explosion-proof.
Seven, structure, classification:
1, high temperature structure type (G)
High temperature structural type (G) is used for medium temperature is too high or too low and need to measure the rate of flow of pipe heat preservation and heat insulation measures of medium measure.High temperature structure is increased the measuring tube and the distance between the indicator to increase heat dissipation, increasing the thickness of insulation material, ensure the indicator work in allow ambient temperature range.Type selection for the "G".
G type metal pipe flow meter can measure the temperature - 80 ℃ to + 300 ℃ medium flow.
2, the structure of the device with damper (Z)
Damper is structured for flow meter inlet flow (pressure) unstable when the medium flow measurement, especially for the measurement of the gas.
3, the structure of the clamp cover model (T)
Clip model structure used for heating or cooling, such as the high viscosity and crystallization medium flow measurement.In the jacketed by heating or cooling medium, make the low boiling point and low solidifying point fluid evaporation and crystallization.
Import and export of heating medium connection, the standard to use HG20594-97 DN15 PN1.6 flange, other connection flange specification can be indicated with factories, jacketed level of pressure is 1.6 MPa.
Clip model see FA standard flowmeter flowmeter structure flange, dimension drawing.
4, high pressure type structure (Y)
High pressure type structure used for pressure is greater than the standard level of measured medium flow measurement.High pressure type structure as shown in the figure below.The recent series of FFM64 zui high pressure can reach 32 mpa.Additional high pressure type flowmeter can provide built-in magnetic filter, the installation height is 350 mm.FA, FB and FC zui pressure to 10 mpa.
Eight, troubleshooting methods:
1, check alarm value set size in the SU.
2 d values cannot too big, check the deviation.
The logical function, FUN, whether it is right.HA - A said cap is logical.LA -a said the lower limit is logic
4, circuit board fault, replace the circuit board.
5, if the LCD bar code instructions correct output without action, can check whether the external power supply and external power of the cathode is connected to the instrument power supply of the cathode.
If metal pipe flow meter in use dithering, could be determined according to the extent of jitter is what range of jitter.Jitter is divided into slightly shaking, moderate jitter and violent shaking.
1, the slight shaking: generally caused by fluctuations in medium.Can be used to increase the damping ways to overcome.
2, moderate jitter: generally caused by medium flow state.Is often caused by unstable operating pressure of medium for gas.Can use voltage or current regulator devices to overcome or increase the instrument air damping.
3, intense shaking, mainly due to the medium pulse, pressure instability or users are given gas pressure, temperature and flow of the operating state of inconsistent with the actual state of instrument, have bigger difference meter range.
Metal pipe flow meter as long as the use method is correct, pay more attention to maintain at ordinary times, can ensure the normal use of it.

Nine,Installation note: 
1, appearance on the scene, before installation to process pipeline, should be out of the box to remove all the packaging and check carefully whether the instrument transportation damage. 
2, instrument, before installation to scavenging process pipeline should be clean, prevent the pipe with ferromagnetic impurities attached on the float of instrument, affect the normal measurement of the instrument, serious can cause damage to the instrument.If you can't avoid, magnetic filters should be installed at the entrance of instrument. 
3, as a result of the instrument measuring mechanism adopts magnetic relay and magnetoelectric signal processor, in order to guarantee the normal use of the instrument and performance, installation within the scope of at least 500 mm is not allowed to have a ferromagnetic material and strong electromagnetic field, strong magnetic field exists. 
4, installed in the instrument, should not be the role of stress, the inward and outward, pipe supports should be reasonable, make the instrument by zui little stress on the process piping. 
5, the installation of instrument is divided into horizontal and vertical installation, vertical installation of instrument, should guarantee the verticality, tilt error is not more than 3 degrees;Level instrumentation installation, shall ensure that the level of the instrument straight degree, tilt error is not more than 3 degrees. 
6, instrument installation, upstream and downstream of the pipe diameter should be the same as the instrument of caliber, connecting flange should match each other;In order to ensure the measurement precision and stability of the instrument and meter length of straight pipe upstream of the instrument as 5 times as the nominal diameter, the downstream straight pipe zui small length is 250 mm. 
7, the measuring gas meter, if direct emissions into the atmosphere, will cause the instrument data distortion or damage to the instrument.In this kind of working conditions, should be installed at the exit of the instrument throttle valve. 
8, the installation of PTFE lining instrument, be especially careful, under the condition of low temperature, PTFE are also deformation under the action of pressure, so don't tighten during installation. 
9, with a liquid crystal display instrument, avoid direct sunlight displays, so as not to reduce the service life of the liquid crystal;Instrument with lithium batteries, avoid direct sunlight, high temperature (65 ℃) or higher environment so as to avoid reducing the capacity and life of lithium-ion batteries.

Ten, measuring range:

Note: when used for measuring liquid, should guarantee the working pressure not less than two timeszuiLarge loss of pressure;When used to measure gas, should guarantee the working pressure not less than5timeszuiBig loss of pressure, stable work to make the flowmeter.

Eleven, parts material:

Twelve, selection of coding:

13, design selection and order items:

1, according to the measurement of fluid is a gas or liquid, correct choose ZW - LZ series metal tube flowmeter.

2, be no corrosive choose normal flow corrosive choose corrosion type.

3, when placing order, please indicate the name of the measured medium, flow rate, pipe size and working pressure, temperature, density, viscosity, and so on and so forth.According to density of scale revised by the user, making special flow scale.

4, according to the measuring range of the measurement of body, applications, and choose the right type of specification varieties.If you have any special requirement of the flowmeter, company or calls, please contact the sales department.

After-sales service commitment:

1, from the date of signing of the contract, I in the way provided for products of the company offers free maintenance and maintenance service, commitment to lifelong maintenance service;

2, jiangsu wei measurement and control instrument co., LTD. Sales manager will be in regular contact with customers, understand the usage of products, and solve the problems of the customers to use in the process of produce, free of charge to provide technical support;

3 the man-made damage is found, the warranty period, our company is responsible for the maintenance, and the resulting maintenance fee;

4, product quality problems or are not satisfied with product, the user can choose unconditional return, wei tt&c don't charge any fees, appear quality problem, bear the freight back and forth.