Marine Oval Gear Fuel Flow Meter
The oval gear flowmeter is a volumetric flowmeter that determines the flow rate by measuring the rotational speed of a rotating turbine as the fluid passes through an oval cross-section pipe. The basic components include an oval pipe, a rotating turbine, a sensor and a display device. Oval gear flowmeter is a kind of volumetric flowmeter, which is used for precise continuous or intermittent measurement of the flow rate or instantaneous flow rate of the liquid in the pipeline. It is particularly suitable for heavy oil, polyvinyl alcohol, resin and other viscosity of the media flow measurement.
Overview
Key Points:
The oval gear shaft should be mounted as horizontally as possible, i.e. the dial should be mounted vertically (the index "0" should be on top), in order to reduce the friction between the oval gear and the casing, and to reduce the wear of the parts. Due to the different installation position, in order to facilitate the reading, the counter (head) can be rotated 90 ° or l80 °
The flow rate in the pipeline should not be increased or decreased drastically, pipeline vibration, hydraulic shock and sharp pressure fluctuations should be avoided, otherwise it will affect the normal operation of the meter.
When the flow rate exceeds the specified maximum flow rate, the oval gear wears out as the rotational speed increases, and the pressure loss increases sharply, so it should be avoided. Below the minimum flow rate, although still able to measure, but the error increases. The starting flow rate of the flowmeter is about 2% of the maximum flow rate, and the normal operating flow rate is preferably 70% to 80% of the maximum flow rate.
Used to measure the high viscosity liquid, generally will be heated to reduce the viscosity of the liquid, and then in the pipeline circulation. When the meter is out of service, the meter filled with liquid cooling and become sticky, such as to start again, must use steam in the table outside the body of the liquid heat flushing and other methods of heating, to be used after the meter to reduce the viscosity of the liquid. Otherwise, the viscous liquid will bite the transmission parts, resulting in damage to the meter.
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