HKLC series of oval gear flowmeter, also known as displacement flow meter is a volumetric flowmeter one kind of flow meter is a high precision for precision continuous or intermittent measurement pipe liquid flow or transient flow oval gear flowmeter picture 
 Volume. It is particularly suitable for the traffic of heavy oil, polyvinyl alcohol, resins and other high viscosity media measurement. Use of mechanical measuring element fluid continuously split into individual known volume of successive measurement room, full emissions number of the volume part of the fluid to measure the total traffic volume. The oval gear flow meter can choose different materials (steel, stainless steel and 316) to manufacture, for flow measurement in the chemical, petroleum, pharmaceutical, electric power, metallurgy and food industry sector. 
 ● Suitable for wide diameter range: Φ10 ~ Φ200 to greater; 
 ● Suitable for a wide range; 
 Measurement of high temperature and high viscosity liquids such as crude oil, diesel, gasoline, etc.; 
 ● Easy to install, easy to operate; 
 ● high precision, stable performance. 

 Technical parameters of the oval gear flowmeter 
 Product Name: oval gear flowmeter 
 Nominal diameter: DN10 ~ of DN200 
 Instrument Material: cast iron, stainless steel, cast steel 
 Pressure levels: 1 .0, 1.6,2.5,4.0,6.3 MPa 
 Medium temperature: low temperature: high temperature of -10 ° C to +300 ° C temperature type -10 ° C to +200 ° C -10 ℃ ~ +80 ℃ -40 to +60 ° C room temperature. 
 Medium viscosity: 0.3 50000 (mPa.s) 
 Pipe connections: GB/T9118-2000 (Chinese standard flange); 
 Site: 99999,999 L, (cumulative flows) 9999,999.9 L (single flow) 9999,999.9 L (instantaneous flow) 
 Output signal: pulse signal 4 ~ 20mA, 1-5V, 4-20 mA + HART protocol MODBUS support RS232, RS485, communication (optional) 
 Explosion-proof the rating: EXiaIIBT5EXiaIICT5, protection class: IP65 
 Error range: ± 0.1% ~ ± 0.5% 

 Basic characteristics of the LCD oval gear flowmeter 
 Flow measurement and fluid flow status has nothing to do, this is because of the oval gear flow meter is to rely on measured media pressure head measured promote the oval gears rotate. 
 Viscosity, the greater the media, the smaller the leakage gap leak from the gear and measurement of space, nuclear measuring media sticky skin the greater the smaller the leak error, the more beneficial for measurement. 
 Oval gear flow meter measurement accuracy is high, the flow in high viscosity media measurement, but does not apply to the fluid contains solid particles (solid particles in the gear stuck, making it impossible to measure flow). If the measured liquid medium is mixed with gas, can also cause measurement error. 


 Oval gear flow meter installation and use 
 A. Installed in the direction of the oval gear flow meter instrument meter shell shown on the direction of the arrow is consistent with the direction of fluid flow, the installation location should be noted that the ease of reading. 
 Two. The oval gear flow meter instrument as far as possible occasions at room temperature, do not install in the occasions of harmful gases and strong thermal radiation to prevent the meter counter some damage. 
 3. Oval gear flow meter meter oval gear shaft installation as much as possible into the horizontal position, instantly dial should be installed into the vertical position (indexing "0" should be above), to reduce the friction between the oval gear and shell, reducing wear and tear of parts . Different installation location, in order to facilitate reading of the counter (table head) rotation 90 ° l80 °. 
 4. Before the installation of the oval gear flow meter instrumentation, piping must be thoroughly cleaned, the entire piping system, the absence of strict filtering device should be installed in the instrument before the filter to prevent impurities into the table. 
 5 The oval gear flow meter instrumentation should be installed downstream of the export side of the pump, flow control valve should be installed in the instrument. When you first open the upstream cut-off valve, then slowly open the downstream flow control valve or stop valve. Prohibited suddenly turned on or off. 
 6. Oval gear flow meter instrument, when used, should make a table full of liquid flow. Should not be mixed with gas within the fluid to be measured, or measured outlet and the mixed volume of the liquid so that measurements are not allowed to, mixed with liquid gas separator gas must be installed before the instrument. 
 7. The flow in the pipeline should not be a sharp increase or decrease, should avoid the phenomenon of pipe vibration, hydraulic shocks and sharp fluctuations in pressure, otherwise it will affect the instrument work. 
 8. When the flow exceeds the specified maximum flow, oval gear as the speed increases wear and tear increase, and the pressure loss increased dramatically, and should be avoided. Below the minimum flow rate, though still can be measured, but the error increases. Flowmeter start the flow of about 2% of the maximum flow of the normal work flow of the best 70% to 80% of the maximum flow. 
 9. Used to measure high-viscosity liquids, generally a liquid heated to reduce viscosity, and circulation in the pipeline. After the closure of the instrument, the instrument filled with liquid cooling becomes sticky if you want to enable steam heating the liquid red heat the outside of the meter body until the liquid viscosity is reduced within the instrument to use. Otherwise, the mucus will bite transmission parts, resulting in damage to the instrument. 
 10. The measured liquid temperature should not exceed the specified value, more than a meter or even stuck motionless. The liquid temperature can also cause additional error of viscosity. In addition, the temperature increase caused by an increase in the size of the crescent-shaped space, so that the instrument slowly, "the measurement chamber of cast iron, oval gear is cast aluminum, the additional error of +0.14% / l00. 
 11. Each oval gear flow meter instrument factory, machine oil on the 7th were calibrated at room temperature, room temperature, the viscosity of the oil is about l0 cps. If the user liquid viscosity and the large difference can be swapped double gear. 
 12. The sweeping lines of steam and water through the instrument is strictly prohibited.