Super was flowmeter

Products overview:

ZW - CLB seriesSuper was flowmeterIs to use the principle of differential pressure type design and production of a new type of plug flow measuring instrument, the super was sensor, differential pressure transmitter and integrating instrument of the flow measurement system, can also be used to control a system or computer networking, fluid flow measurement and control.Super sensor was centrally reflect the latest research results of velocity-equalizing tube flow sensor.Sensor shape such as warhead, in line with the principle of fluid dynamics, differential pressure signal can produce accurate and stable, high strength, no leakage, anti clogging.With high measurement precision, reliability, good stability, etc.Measured gas, liquid, steam and corrosive medium such as a variety of fluid, adapt to the size of the pipeline, applied in the occasion of high temperature and high pressure.

Second, the working principle:

ZW series of CLB super was meter when the fluid flows through the probe, a high pressure generated in the front of its distribution area, hydrostatic pressure slightly higher than the area of high pressure pipe.According to the principle of Bernoulli equation, to speed up the speed when the fluid flows through the probe, the probe at the back of the produce a low pressure area, the pressure is slightly lower than area of low pressure pipe of the static pressure.Fluid from the probe through the vacuum on the probe at the back of the part, and appear on both sides of the probe vortex.Average flow cross section shape of probe, the condition of surface roughness and low pressure hole location is the key to probe performance factors.Low voltage signal is stable and accurate, is crucial to average probe of precision and performance.Average flow probe can be detected accurately by the fluid produced by the average speed of the average differential pressure.Average flow probe in high and low pressure area according to certain criteria to take more pressure hole configuration, making it possible to accurately measure the average velocity.

Applications:

ZW series of CLB super was flowmeter differential pressure transmitter output for the differential signal, and the measurement of differential pressure instruments and meters, can be accurately measured, pipe, rectangular pipe in a variety of liquids, gases and steam (superheated steam and saturated steam).The size of the pipeline under test range from 20 mm - 3000 mm.In the power industry (including nuclear industry) chemical industry, petroleum chemical and metal smelting industry departments such as the bank of China to the use of success, it is suitable for:

1, gas and liquid transportation;

2, energy research, steam boiler heat rate, efficiency of pumps, gas compressor efficiency and fuel consumption.

3, process control, input and output, ratio and balance;The cooling water or air, steam heating;

4, material of chemical industry.

Four, the main features:

1, according to the principle of aerodynamics design of measuring profile, through special craft processing can make the fluid traction and vortex shedding force is very small and at the same time, the adoption of new air inlet and airfoil aerodynamic design, streamline sensor introduced the principle of resistance to surface wind shear turbulence, apply pressure in the flow field more smoothly, without vortex, and stable signal pulse.

Taking lateral static pressure in the hole, and the static pressure in the fluid and the sensor after the separation point, avoid installation direction deviation or flow static pressure deviation of deflection, etc.Characteristic of the differential pressure signal of multistage amplifier function, combined with the speciality of a variety of flow meter, with functions of traffic signal multistage ascension, at the same velocity of super was better than the other, similar to plug in the flow measurement device, the differential pressure signal amplification 1 to 10 times, still can obtain larger under ultra small velocity differential pressure signal, can be used in the low velocity of gas flow measurement.

3 there is no moving parts, structure, guaranteeing the high life of sensors, and ensure the long-term stability and accuracy of drift.

4, high accuracy (1.0%) or less, good repeatability (1.0%) or less.

5, energy saving: with more in line with the wing structure of flow field flow caused by pressure loss is extremely low, the energy consumption greatly reduced.Compared with other flowmeter zui low cost.Especially suitable for small liquid pipe flow measurement.In the application can quickly recover the instrument cost.

6, dust, static pressure hole take on both sides of the sensor, foreign bodies and insensitive to the medium, is a kind of ideal flow sensor.

7, velocity-equalizing tube (was) flow sensor has many special materials to choose, to meet is corrosive, ultra high temperature, super high pressure needs.

8, velocity-equalizing tube (was) flow sensor can work throughout the year, basic maintenance free.

9, installation is simple, the cost is very low.

Five, the technical parameters:

1, the accuracy of measurement: plus or minus 1% repeat accuracy: + / - 0.1%;

2, apply pressure: 0 ~ 40 mpa applicable temperature: 180 ℃ ~ + 550 ℃;

3, measurement limit: depends on the strength measurement probe floor: depends on measuring zui uninteresting facts pressure requirements;

4, range than: more than 10, 1;

5, suitable diameter: 38 mm to 9000 mm round tubes, square tubes;

6, suitable medium: tube, one-way flow, one-way gas, steam and not greater than 1 0 centipoise liquid viscosity range and its widely used, it is used for various kinds of gas, liquid and steam measurement, the following is a typical application of medium.

Six, operation and maintenance:

The preparing work before put into operation:

1, sensors installed correctly:

Complete sensors installed in the line, must carefully check before put into operation, require welding is firm, in the right direction, not leak, strictly proper insertion depth, etc.

2, instrument calibration:

Sensor matching instrument differential pressure transmitter and intelligent flow integrating instrument (there could be pressure transmitter and temperature transmitter), etc.Must be after inspection and calibration, can be put into use.The instrument measuring range to conform to the requirements of the sensors and the measured medium.Such as measured zui large air flow Qmax = 5000 m3 / h, the calculation to calculate differential zui big value of sensor

Delta Pmax = 0.6 Kpa, the measuring range of differential pressure transmitter should be set-up of 0 ~ 0.6 Kpa, the corresponding output 4 ~ 20 madc current signal.For universal, flow totalizer.especially should according to the real-time flow range, differential pressure range, medium density, temperature, pressure, flow operation requirements, etc., prior programming configuration, input totalizer.especially can correct operation and make sure totalizer.especially display traffic.

3, instrument wiring correct:

Sensor and differential pressure transmitter, flow integrating instrument of measuring system, such as supporting the power cord, signal output to the input line between instrument, control and alarm, etc., in various instrument wiring board (also known as terminal board) are clearly marked, is must confirm and don't choose to use, before the operation of the instrument connection to check again and again.In order to do the preparing work before put into operation, in addition to read the instruction for use, you should also read the differential pressure transmitter operation instruction handbook ", "operation instruction handbook" intelligent flow totalizer.especially etc, comply with the instruction manual for the guidance of work.

The flow operation of work:

1, the measurement system is closed:

Operation of preparatory work has been completed, the medium to be measured with flow process piping, sensor measuring system is temporarily closed, then should make three balancing valve is fully open valve group, high pressure valve Pl P2 and low pressure valve closed.Meter is in a state of power supply, preheating about 15 minutes.

2, open measurement systems:

Instrument after preheating, open measurement system.Open the Pl on three valve group and P2 valves, balance valve is still in the open.At this time, the differential pressure transmitter has filling the measured medium (gas or liquid), open the drain valve on the transmitter, quickly closed after discharge dirty liquid or gas.Then close three the balance valve on the valve group, transmitter that is entered into a state of differential pressure measurement.Output and the corresponding signal current differential delta P I delta P from the signal current value (m A) to calculate the pressure delta P values (KP) A.Also flow totalizer.especially into work state, show the measured medium flow.

If the above work all goes well, the flow meter works well, commissioning work is complete, delivery production use.

Eight, and blockage of the sensor design.

Probe flow probe's unique design thoroughly get rid of the past several average probe easily blocked, the characteristics of accuracy is not high, make a source of measurement accuracy, repeatability and reliability to a new height.

Just when switched on, the fluid in the pipeline under the action of static pressure, into the pipe bending, quickly formed a pressure balance state.When pressure balance formation fluid in high pressure pipe inlet, detour, no longer into the bend.

Probe type of flow sensor is high, low take pressure hole held in nature

In general, dust, sａnd and particles under the action of the vortex street force, concentrated in the very back of the probe.This is why the autumn leaves are always in the leeward behind the house.Held in the probe's unique design, coupled with the nature of gravity whereabouts, prevents the particles into, this design essentially prevent the congestion and can create a very stable low voltage signal.

Work continuously probe fundamentally eliminate the possibility of the wall, but in the following cases, still should pay attention to prevent:

1, when the pressure pipe leaking, probe high pressure balance to destruction of impurities in the diameter of the smaller particles are likely to enter the hole.

2, when the pipeline was shut down, because of the brown movement of molecules, small particles of impurities may enter the hole.

3, and frequent system key, formed in high, small particles of impurities may enter the hole, accumulate over a long period, it is possible to probe the jam.

4, medium contains a large number of biological species, or containing fibrous material, may also cause the probe of the jam.

Seven, the main parts:

1, super was according to pipe diameter custom, with flange installed on the pipe, made of stainless steel refined but become, according to the various parameters of the users in high precision wind tunnel laboratory simulation, will the characteristic curve and database, used for calculation.

2 is to display the measured results, flow totalizer.especially secondary instrument.Through wires connected to each transmitter and thermometer, the motherboard is equipped with advanced CPU and the application software, can use the display window and switch button to setup, calibration and the parameters display.

3, differential pressure transmitter will will convert the differential pressure signal of 4-20 madc analog current signal.

4, pressure transmitter in the gas flow measurement with pressure compensation.

5 in gas flow measurement, temperature transmitter temperature compensation.

6, dc power supply for pressure transmitter, differential pressure transmitter power and thermal resistance thermometer.

Eight, form a complete set of scheme selection:

1, is according to the measured medium, and the user use the pipe inner diameter, working temperature, working pressure and flow design and production.

2, ZW - 3051/1151 dp series differential pressure transmitter or other types of differential pressure transmitter.

3, ZW - 308 series pressure transmitter, or other type of pressure transmitter.

4, temperature transmitter, or other type of temperature transmitter.

5, ZW - XMJA series or other types of flow totalizer.especially flow integrating instrument.

6, of this intelligent velocity-equalizing tube flowmeter, pressure compensation can take temperature, and can show the instantaneous flow and cumulative flow medium medium temperature, the pipe, the pipe pressure and differential pressure equivalent, equipped with communication interface and 4 ~ 20 ma output.

Nine, equipment complete set:

1, velocity-equalizing tube flow sensor 1;

1 2, velocity-equalizing tube flow sensor operating instructions;

3, 1 certificate;

4, form a complete set of transmitter instrument and manual and certificate of approval (which can be ordered by the users themselves).

Ten, product maintenance instructions:

Super was flow sensor should be performed in the process piping overhaul regular cleaning, cleaning the way many, such as air blow test tube accumulated filth;Scrub with kerosene and soft silk net, make each hole to maintain patency.May produce the cause of the failure and remove methods: serial number of failure causes clear way.

1, differential pressure signal output: high and low pressure valve is not open, open the high and low pressure valve.

2, high and low pressure balance valves did not tighten, tighten balance valve.

3, differential pressure signal output is too small, pressure system has a leak phenomenon;Seriously looking for, eliminate the leakage.

4, improper secondary table range selection: uninteresting facts limit pressure transmitter.

5, differential pressure signal output is too large, secondary table range matching is undeserved, augmenting the upper limit, differential pressure transmitter back-pressure aperture jams, cleaning velocity-equalizing tube, eliminate congestion.

11, using a note:

1, the current body shall be full of pipe flow and stability.

2, the fluid being measured should be single phase, the phase constant, the composition of complex fluid must be similar to a single component of fluid can be used.

3, the current body under actual conditions of ReD should be greater than 3 x 104.

4, should guarantee the sensor before and after the straight pipe length requirements.

5, pipe diameter greater than 100 ㎜ as well.

6, 2 d in front of the sensor on the surface of the pipe, should be clean and smooth.

Twelve, selection of coding:

13, design selection and order notes:

1, the name of the measured medium;

2, the biggest, commonly used, flow range (m3 / h);

3, work pressure (Mpa), temperature (℃), the maximum pressure (Mpa), upper and lower temperature (℃);

4, medium density, viscosity,

5, pipe material, inner diameter, outside diameter;

6, the pipe laying and local resistance.

7, you need to display instrument of the measurement and control of form a complete set, please refer to the corresponding specifications, choose the right model or the information provided by our company technical personnel according to your designs for you selection.

8, if you have special want to, please contact our 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.