The same quality of fuel at different temperatures when the volume is not the same, China's petrol station management system is currently ignoring this point. At present, the measurement results of the tanker on the market are mostly the value of the oil temperature at non-standard temperature, and the tanker has no volume temperature correction function technically. If the tanker does not consider the temperature change factor, the measured value is not the standard temperature of 20 ℃ volume, will inevitably affect the measurement of the value of the unity and accuracy, resulting in oil sales error. According to the International Recommendation OIML R117-1995 "Non-aqueous liquid measurement system", the gasoline flow meter can use the conversion device to modify the volume, the actual volume measurement results into the standard temperature (15 ℃ or 20 ℃) under the volume For our country, the standard temperature is 20 ℃).
Gas transmission pump is a gas can be inhaled and discharged continuously, so as to achieve the purpose of the vacuum pump exhaust. Gear pump is a rotary pump on the pump cylinder and the gear between the formation of the work of the volume change and move the transmission so that pressurized liquid or. Hydraulic piston pump or solid pump, driven by hydraulic power pack of hydraulic cylinder, hydraulic cylinder to promote the transport cylinder, conveying cylinder material output to pipeline.
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