An oval gear flowmeter is a type of flow meter commonly used in industrial settings to measure the flow rate and volume of high viscosity liquids such as chemicals and fuels. It is designed to provide accurate measurements and automated control. The flowmeter operates by discharging the fluid volume of four crescent-shaped cavities enclosed by the gear and the shell wall in one cycle. It offers advantages such as high measurement accuracy, simple structure, easy installation and cleaning, and the ability to rotate the flowmeter for easy reading. The technical data of an oval gear flowmeter includes information about materials used, accuracy, range ratio, repeatability, pressure, diameter range, viscosity, and temperature range. Companies interested in oval gear flowmeters can inquire about their capacities and applications from suppliers.
Oval Gear Flowmeter Fault Conditions and Handling Methods #
| Fault phenomenon | Possible causes | Exclusion method |
| No output signal after power on | 1. There is no medium flow in the pipeline or the flow is lower than the initiating flow; 2. The power supply and the output line are not connected correctly; 3. The preamplifier is damaged (the integrator does not count, and the instantaneous value is “0”); 4. The drive amplifier circuit is damaged (the integrator display is normal). | 1. increase the medium flow or replace the flowmeter with smaller diameter to meet the requirements of flow range; 2. correctly connect the wires; 3. replace the preamplifier; 4. replace the damaged components in the drive amplifier. |
| When there is no flow, the flowmeter has signal output | 1. The flowmeter is poorly grounded and the strong current and other ground wires are interfered; 2. The sensitivity of the amplifier is too high or self-excited; 3. The power supply is unstable, the filter is poor and other electrical interference. | 1. Properly connect the ground wire to eliminate interference; 2. Replace the preamplifier; 3. Repair and replace the power supply to eliminate interference. |
| The indication of instantaneous flow is unstable | 1. The medium flow is unstable; 2. The sensitivity of the amplifier is too high or too low, and there are multi meter and missing meter pulses; 3. There are sundries in the shell; 4. The grounding is poor; 5. The flow is lower than the lower limit value; 6. The rear sealing ring extends into the pipeline, forming a disturbance. | 1. Measure after the flow is stable; 2. Replace the preamplifier; 3. Remove dirt; 4. Check the grounding circuit to make it normal |
| The indication of accumulated flow is inconsistent with the actual accumulated amount | 1. The meter coefficient input of the flowmeter is incorrect; 2. The normal flow of the user is lower or higher than the normal flow range of the selected flowmeter; 3. The flowmeter itself is out of tolerance | 1. Input correct instrument coefficient after recalibration; 2. Adjust pipeline flow to make it normal or select flowmeter of appropriate specification; 3. Recalibrate. |
| Abnormal display | The converter key is in poor contact or locked. | Replace the display board. |
