Intelligent gear flowmeter

Duoqin Instrument (Shanghai) Co., Ltd

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Intelligent gear flowmeterPerformance parameters:

★ Caliber: DN10-150

★ Material: Cast iron, cast steel, stainless steel

★ Display: Double row digital intelligent meter head, displaying instantaneous flow and cumulative flow, with remote transmission function

★ Interface: flange, thread

★ Power supply: lithium battery power supply, 12V, 24V

★ Pressure: 1.6MPa, 2.5MPa、4.0MPa、6.3MPa

★ Temperature: 0-60 ° C

Intelligent gear typeflow meterCommon models:

Required parameters for selection: fluid name, fluid viscosity, pipeline material and diameter, Z-high Z-low working pressure, medium temperature, flow range, and on-site operating conditions requirements.

Common models:LC-100A15

Model annotation:Elliptical gear flowmeterThe measuring medium is oil and the temperature is below 60 degrees, DN100， Rated pressure of 4.0MPa, body material of cast iron, precision0.5，intelligent typeDisplay instantaneous flow and cumulative flow, output 4-20mA, 24V power supply, flange connection.

The price of flow meters is affected by changes in selection specifications, caliber, and configuration. It is not a product and requires a quotation based on your operating conditions

Intelligent gear flowmeterWorking principle: (dual rotor gear meshing)

Intelligent gear flowmeterComplete specifications and diverse varieties

Intelligent elliptical gear flowmeterEasy to read, displaying instantaneous flow and cumulative flow:

Ensure accuracy measurement range:

Installation and Usage
1The installation direction of the instrument should be such that the arrow direction on the instrument housing is the same as the liquid direction, and the installation position should be convenient for reading.

2.Instruments should be installed at room temperature as much as possible, and should not be installed in environments with harmful gases or strong thermal radiation, which may cause damage to the counter part of the instrument.

3.The elliptical gear should be installed in a horizontal position as much as possible, that is, the dial should be installed in a vertical position (the index "0" should be on top), to reduce the friction between the two planes of the elliptical gear and the housing, and to reduce part wear.

4.The instrument is installed at the output end of the pump. If it is installed at the suction end, the pressure loss of the instrument filter increases the negative suction pressure of the pump, and the liquid outflow at the pump shaft also increases the error of the instrument. The flange at the suction end of the pump should also prevent air leakage, otherwise it will also increase the error of the instrument.

5.A filter should be installed in front of the instrument to prevent particles larger than 0.2 millimeters from passing through and to prevent blockage of the instrument due to particles. The filter should be easy to clean.

6.Install a check valve in front of the instrument to ensure that the liquid in the pipeline can only flow in one direction, preventing damage to the counter.

7.As shown in Figure 5, it is recommended to install a bypass and valve, which can be installed horizontally, vertically, or in other directions from top to top, from top to bottom, from left to right, or from right to left.

8.When using the instrument, it should be filled with liquid and there should be no gas mixed in the measured liquid, otherwise the measurement may be inaccurate. Liquid mixed with gas must be equipped with a gas separator in front of the instrument.

9.Before installing the instrument, the pipeline in front of the instrument should be carefully cleaned of debris. Only when the instrument is connected to the pipeline can the sealing plug on the instrument interface be removed to prevent debris from entering the instrument. When installing instruments, precautions should be taken to prevent debris from falling into the pipeline.

10.When the flow rate exceeds the specified Z large flow rate, the wear of the elliptical gear increases with the increase of rotation speed, and the pressure loss increases sharply. Therefore, it should be avoided from use. Although it can still calculate the flow rate below Z small flow rate, the error increases. When the liquid viscosity is 10 centipoise, the starting flow rate of the instrument is about 1% of the full range.

11.Each instrument is calibrated with a No. 7 mechanical oil gauge at room temperature before leaving the factory, and the viscosity of the oil varies with room temperature, with a viscosity of 13 centipedes per month at room temperature. In theory, the change in liquid viscosity measured by a volumetric flowmeter does not affect the measurement accuracy. However, in reality, due to the gap between the measuring chamber wall and the elliptical gear, the amount of leakage generated in the gap is affected by the viscosity of the liquid.

12.When used to measure highly viscous liquids, the liquid is generally heated to reduce viscosity, and then circulated in the pipeline. When the instrument is stopped, the liquid filled in the instrument cools down and becomes viscous. If it is to be activated, it is necessary to use steam to heat the liquid outside the title, and only use it after the viscosity of the liquid inside the instrument has decreased. Otherwise, the mucus will hold onto the transmission parts and cause damage. It is strictly prohibited to sweep steam through the meter body to avoid damaging the instrument.

13.The temperature of the tested liquid should not exceed the specified value. If exceeded, it may even get stuck and cause additional errors in viscosity due to changes in liquid temperature. In addition, the increase in temperature also leads to an increase in the volume of the crescent space, causing the instrument to "walk slowly". When the measuring chamber is made of cast iron and the elliptical gear is made of cast iron, the additional error is about 0.33%/100 ℃; when the measuring chamber is made of cast iron and the elliptical gear is made of cast aluminum, the additional error is 0.14%/100 ℃.

14.The flow rate in the pipeline should not increase or decrease dramatically in an emergency, and pipeline vibration, hydraulic shock, and rapid pressure fluctuations should be avoided, otherwise it will affect the normal operation of the instrument.

15.The pressure loss is proportional to the square of the liquid flow rate, and as the viscosity of the liquid increases, the pressure loss also increases.

Adjustment:

The basic error of the instrument within the specified range of Z small flow and Z large flow shall not exceed ± 0.5%. The calculation method of error is expressed as the difference between the cumulative indicated flow rate Q of the instrument and the actual flow rate Q of the standard container, expressed as a percentage of Q, that is:

Error=(Q refers to - Q real)/Q real x 100%

The instrument is fast, and the error is represented by "";

The instrument is slow, and the error is represented by "-".

In order to reduce the difference between the instrument and the actual flow rate, the instrument is equipped with a transmission ratio adjustment device (see Figure 7), and the adjustment gear on the adjustment plate can be interchanged. When calibrating the instrument, select appropriate adjustment gear 4 to make the reading as close as possible to the actual flow rate. After using the instrument for a period of time, or measuring the viscosity or temperature changes of the liquid, the error value may differ from the error value during calibration. To compensate for the errors that may occur, please refer to the gear adjustment list and choose gears with transmission ratios that can be purchased from our factory.

Selection reference:

All samples of elliptical gear flowmeter displayed:

Sample display of the same series:

(Zero return type cast iron material)

(Made of 304 stainless steel material)

(Internal thread connected elliptical gear flowmeter)

(Pure mechanical)

After sales and warranty

All products supplied by Duoqin Instrument (Shanghai) Co., Ltd.:

All products come with a 2-year warranty;

Provide free consultation, guidance on installation and debugging services;

Negotiate on-site guidance for installation, debugging, and other matters, and only charge reasonable travel expenses;

Large quantities can provide free on-site guidance for installation and debugging;

Service tenet: No matter how long the product is used, as long as you find us, we will solve all problems for you until you are satisfied. We believe that our over 10 years of experience in the flowmeter industry can provide you with satisfactory service.

Duoqin Instrument (Shanghai) Co., Ltd. Main products:Electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, ultrasonic flowmeterVCone flowmeter, metal rotor flowmeterGear flow meter、Ultrasonic heat and cold meters, as well as (explosion-proof) quantitative control systems and other products,Your needs and satisfaction will always be our pursuit. Please contact us for consultation and purchase