Stainless steel oval gear flowmeter

Products overview:

ZW - LC - B seriesIs one of the volumetric flowmeter in common.Volumetric flowmeter has a long history, belong to a kind of, in the flow meter is of high precision.Used for a variety of medium viscosity range measurement.Especially suitable for measuring the low viscosity of the medium.Has two kinds of mechanical counter and electronic counter.Outer shell is made of stainless steel;Bearing material have many options for: graphite, ceramic, hard alloy, bronze, stainless steel sealed bearing, etc., it has two kinds of mechanical, electronic counters, multiple output methods: pulse equivalent, 4-20 ma, RS485, Hart, etc.

Second, the working principle:

ZW - LC - B series of stainless steel oval gear flowmeter measurement part is mainly composed of two mutually meshing elliptical gear and shell (measuring room), elliptical gear turn every week the parallelism of the measured medium quality for half moon volume 4 times, by the elliptical gear meteor millions of volume flow rate Q: Q = 4 n nu 0

Type:

N - the rotation of the elliptical gear frequency (r/s);

Nu 0 - half moon part volume (Mr.).

So, in the half moon volume of the oval gear flowmeter nu 0 given conditions, as long as the measure of elliptic gear rotational speed n, can know the measured medium flow.

Oval gear flowmeter flow signals (that is, the elliptic gear rotating speed n) showed that has two kinds of on-site display and remote transmission.

In situ show that the gear rotation through a series of deceleration and adjust speed than institutions, directly connected to the instrument panel on the indicating needle, and the total amount after mechanical counter display.

Far eastone shows mainly through the reduction gear after * magnet rotates, making spring relay contact with * magnet synchronization to make or break the rotation of the same frequency, thus far to another display instrument issued by electrical impulses.

Applications:

ZW - LC - B series of stainless steel oval gear flowmeter used diesel, gasoline, jet fuel, lubricating oil metering, can cooperate to quantitatively control the flow totalizer.especially, mainly used in strong corrosive liquid medium, such as acid, alkali, salt and organic compound content measurement.

Four, the main features:

1, high measuring precision, a magnitude 0.2 and 0.5;

2, simple structure, strong, reliable operation;

3, especially suitable for measuring high viscosity medium, and is not sensitive to the change of measured liquid viscosity;

4, easy to install.Straight pipe before and after the meter does not need to, even if the flow near the valve, bent pipe, shrinkage pipe, expand, also need not add straight pipe;

5, to prevent the gear flowmeter was impurities card to death, in the flow meter must be installed upstream of the filter.

Five, the technical parameters:

1, safety explosion-proof: Exia Ⅱ CTSd Ⅱ BT4;

2, connection mode: flange connections: DN10 DN200 ~;

3, installation method: horizontal, vertical;

4, diameter series: DN10, 15,20,25,40,50,80,100;

5, loss of pressure: 0.1 MPa or less;

6, precision grade: normal 0.5 on the Richter scale, high accuracy 0.2 on the Richter scale;

7, medium pressure: regular 1.6 MPa, 3.2 MPa high-pressure type;

8, viscosity scope: ordinary: 0.6 ~ 200 mpa. S;

High viscosity of 200 ~ 1000 mpa. S;

9, medium temperature: regular < 120 ℃, high pressure type < 200 ℃;

10, table body material: cast iron, cast steel, stainless steel, etc.;

11, moving parts are: aluminum alloy, stainless steel, etc.

Six, instrument adjustment:

Instrument within the prescribed scope of traffic basic error is not more than plus or minus 0.5%.Error calculation method to meter the cumulative instructions flow Q refers to standard containers the difference between the real and actual flow Q Q solid percent, namely:

Error = (Q - Q solid)/Q x 99%

Instrument faster, error with "+";

Instrument is slow, error with "-" said.

In order to narrow the instrument and the difference between the actual flow, instrument equipped with transmission ratio control device, adjustment plate on the gear can be change.Instrument adjustment as appropriate when check gear 4, make the reading of the instrument and the actual flow as far as possible close to, instrument use after a period of time, or measuring the viscosity of the liquid or temperature changes its error value and check the error may not be consistent.To compensate for the error, can refer to adjust the gear list, choose the adjustment of the gear transmission ratio, to the factory purchase.

Seven, measurement requirements:

1, the flow measurement has nothing to do with the flow of the fluid, it is because the oval gear flowmeter is depend on the measured medium pressure head driving elliptical gear rotating and measure.

2, the greater the viscosity of the medium, from gear and measuring the less empty clearance leakage of the leak out, therefore the greater the nuclear medium sticky skin, the smaller the leakage error, to measure more advantage.

3, high measuring accuracy, suitable for high viscosity medium flow measurements, but not containing solid particles of fluid (solid particles will gear jammed, so that you can't measure traffic).If the mixed with gas in the liquid medium to be measured, can also cause measurement error.

Eight, install the main items:

1, the instrument before installation should clean pipeline.If the liquid containing solid particles, it must be in the pipes upstream filter;If the containing gas should install exhaust system.

2, the instrument is not certain requirements for straight pipe before and after.It can be installed in a horizontal or vertical.When installation, should make the oval gear flowmeter rotation axis parallel to the ground.Instrument will highlight the influence of the leakage error, can't guarantee enough accuracy of measurement.Therefore, different specifications of the elliptical gear flowmeter has a permitted to use the traffic, only when the actual measured flow is greater than the lower limit value, the measurement precision can be guaranteed.

3, using elliptical gear flowmeter should pay attention to the temperature of the measured medium cannot be too high, otherwise not only can increase the measurement error, and there are may be stuck in the gear.Therefore, oval gear flowmeter in the instrument by using temperature range.

Nine, appearance size:

Stainless steel type standard dimension: (unit: mm)

Ten, measuring range:
Ordinary cast iron type (AType), cast steel,EType), stainless steel,B）

Twelve, selection of coding:

Ten, design selection and order notes:

1, choose oval gear flow timing, it is suggested that according to the measured liquid flow control meter flow range of 30 ~ 70% choose specifications;According to the fluid temperature, and the size of the pipeline pressure, and corrosion properties of liquid viscosity, etc to select flowmeter types;

2, when ordering, please specify the model of flow meter, diameter (mm), whether to ask explosion-proof, name of the medium, flow range (m3 / h), work pressure (MPa), temperature (℃), medium viscosity (MPa) s), to measure the corrosion medium, the user must also specify the medium corrosion properties, medium concentration (%), medium temperature (℃);

3, this product can according to user requirements, within the header assembly electrical/current transmission device;

4, when ordering parts, please click and fill in the figure, the collapse of the list;

5, user, if you have special request, please put forward in order;

6, our company can provide filters, venting device with flow meter, intelligent flow integrating instrument.

After-sales service commitment:

1, our company sold by flow meter series products within twelve months appear quality problem, is responsible for free maintenance.