Pointer metal pipe flow meter

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ZW - LZ seriesPointer metal pipe flow meterSuitable for measuring the liquid and gas.All metal struc…

ZW - LZ seriesPointer metal pipe flow meterSuitable for measuring the liquid and gas.All metal structure, with 0 to 10 ma, standard 4-20 ma analog signal output and the instructions.Cumulative, digital communications, on-site measurement parameters, different ways of power supply function, with magnetic filter and special specifications varieties.Has the advantages of simple structure, reliable operation, wide applicable range, accurate measurement, installation is convenient wait for a characteristic, high temperature resistance, resistance to high pressure, with normal and anti-corrosion type, the above two types are divided into the scene and electricity far eastone, normal flow sensor, instrument materials for (1 cr18ni9ti), anti-corrosion type for lining PTEF (1 cr18ni9ti).If in the medium of metal tube float flowmeter measurement contains ferromagnetic particles, magnetic filters should be installed at the entrance of flowmeter.The material of it shall be the same in the corresponding flow meter.
LZ series on the design of the indicator can provide reliable and suitable for various applications function combination.Such as the pointer instructions, LCD display instantaneous and cumulative flow, etc., the power indicator selection with battery power supply, 24 VDC power supply, the 220 vac power supply, convenient user site condition.
Second, the structure and working principle: 
1, the structure: 
ZW - LZ series pointer type metal pipe flow meter is mainly composed of three parts: 
A, indicator (intelligent indicator, on-site indicator); 
B, float; 
C, tapered measuring room. 
2, how it works: 
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, 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 - LZ series pointer type metal pipe flow meter by its simple structure, long service life, the linear calibration, can be used to measure the liquid and gas, etc and is widely used, such as petroleum, chemical, power plants, food industry, pharmaceutical industry, water treatment and other industrial field.
Four, the main features: 
1, suitable for small diameter and low flow velocity; 
2, reliable operation, less maintenance, long service life; 
3, low requirements for downstream straight pipe; 
4, have a wide flow range now; 
5, in situ pointer indicates close to linear; 
6, intelligent indicator with LCD display, it can display instantaneous, accumulated flow, also can output pulse, the output alarm; 
7, with temperature compensation; 
8, on-site, remote transmission, clamp cover model, explosion, corrosion, and other forms; 
6, HART communication protocol. 
Five, the technical parameters: 
1, the measuring range: water (20 ℃) : 1-200000 I/h;Air (20 ℃) 0.1.13 Mpa 0.03 ~ 4000 m3 / h. 
2, range than: standard: 10:1;Special type: those days; 
3, accuracy: standard: 1.5 on the Richter scale;Special type: 1.0 on the Richter scale; 
4, pressure rating: 
Standard: DN15 - (4.0 Mpa;DN80-1.6 Mpa DN200; 
Special type: DN15 - (25 mpa DN80 - DN200 16 mpa; 
5, the pressure loss: 7 kpa to 70 kpa; 
6, medium temperature: standard: - 40 ℃ ~ 100 ℃;High temperature: 100 ℃ ~ 450 ℃; 
7, the medium viscosity: 
DN15：n<5mPa.s（F15.1-F15.3） n<30mPa.s（F15.4-F15.8）； 
DN25：n<30mPa.s； 
8, environment temperature, remote transmission type: 40 ℃ ~ 185 ℃ (LCD will not damage) LCD working in - 30 ℃ ~ 80 ℃; 
9, the connection form: the standard: DN201 standard flange;Special type: by the user to specify any standard flange or thread; 
10, cable interface: within the flameproof for 1/2 NPT threads, other M20 ` 1.5 internal thread; 
11, power supply: 
Standard: 24 VDC two wire 4-20 ma (12 VCD - 32 VCD; 
Alarm type: 24 VDC three-wire system 4-20 ma (18 VCD - 28 VCD; 
50 hz ac type: 85-265 (VCD; 
Battery type: 3.6 V, 7.5 AH lithium battery, can use continuously for three years; 
12, load characteristics: 
Two wire: Rlmax = 50 (12) = 600, 24 V. 
Alarm type: zui big load resistance is 200, ac type: zui big load resistance is 200; 
Transient flow alarm alarm output: the upper or lower limit;Switch quantity alarm;Relay output; 
Liquid crystal display: instantaneous flow display value range: 0-50000 (decimal); 
13, protection grade: IP65. 
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.
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. 
Nine, installation considerations. 
1, checked out after remove the filler of the flow meter, flow meter should be installed vertically on the no vibration of the pipeline, such as horizontal installation, should additional specifications when ordering.The center line of the flowmeter and the vertical Angle should not exceed 5 °. 
2, new pipelines in tube flow meter before installing a new pipeline should be rinsed clean, if the medium to be measured particle impurities or bubbles, filters should be installed in the upstream flow meters or set the outlet, fluid when installation must flow from the bottom up, if the fluid flow from the top down, the meter doesn't work.If measured medium is pulsating flow, should be in the downstream set appropriate size buffer device, such as buffer tank to eliminate pulsation. 
3, to facilitate the check meter zero and disassembling maintenance and debugging, the cut-off valve should be installed at upstream or downstream flow meter and the by-pass valve. 
4, a meter installed by the regulation, should be closed either upstream or downstream flow meter cut-off valve, check instrument and secondary instrument connection again, and, after open secondary instrument power the instantaneous flow shall display to zero.To normal use, should be open upstream first after the valve is fully open, with metal pipe float flowmeter downstream regulator from small to large, slow flow rate adjustment, the instantaneous flow rate should be changed.Stop working, the upstream downstream of the valve, then close the regulator should be shut down.

Ten, flow parameter list:

Eleven, selection of coding:

Twelve, 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.