Can a cast iron elliptical gear flowmeter | liquid turbine flowmeter measure high viscosity liquids

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1. Selection of Capacity Flow Meter Performance

The selection of capacity flow meter performance should mainly consider the following five factors in the selection of capacity flow meter performance: (1) flow range; ⑵ Physical properties of the tested medium; ⑶ Measurement accuracy; ⑷ Pressure resistance performance (working pressure) and pressure loss; ⑸ Purpose of use. The flow range of a volumetric flowmeter is related to factors such as the type of medium being measured (mainly determined by fluid viscosity), usage characteristics (continuous or intermittent operation), and measurement accuracy. When using the same volumetric flowmeter for fluids with higher viscosity, the flow range is larger for different types of media (mainly because the lower limit flow can be extended to lower values); For the usage characteristics, when used for intermittent measurement, its flow range is relatively large (mainly because the upper limit flow can be larger than that during continuous operation); For measurement accuracy, when used for low accuracy measurements, the flow range is larger, while when used for high accuracy measurements, the flow range is smaller. This can also be clearly seen from the characteristic curve of the flowmeter. In order to maintain the good performance and long service life of the instrument, the maximum flow rate during use should be selected at 70% -80% of the maximum flow rate of the instrument. Due to the large volume of conventional volumetric flow meters, significant noise is generated at high flow rates, making them generally suitable for measuring small and medium flow rates. Based on the performance of volumetric flow meters, when measuring large flow rates, a 45 degree combined wai

st wheel structure flow meter can be used; In situations where low-noise operation is required, a dual rotor flowmeter can be used. ⑵ The physical properties of the tested medium mainly consider the viscosity and corrosiveness of the fluid. Considering viscosity to choose the appropriate type of flow meter, while corrosiveness is one of the main factors in choosing flow meter materials. For example, flow meters made of cast steel or iron can be used to measure various petroleum products; Flowmeters made of copper alloy can be used for mildly corrosive chemical liquids and for cold and warm water; Stainless steel flow meters should be used for pure water, high-temperature water, crude oil, asphalt, high-temperature liquids, various chemical liquids, and food. In addition, for flow meters used in the food industry, except for parts that come into contact with fluids that must be made of stainless steel and meet hygiene requirements, the structure should be easy to disassemble and clean, and there should be no liquid storage area inside the flow meter, such as elliptical gear flow meters, rotary piston flow meters, etc. The volumetric flowmeter is currently one of the flow meters with the highest measurement accuracy. The measurement accuracy provided by the manufacturer on the product sample refers to the basic error obtained under laboratory reference conditions. However, in actual use, deviations from on-site conditions will inevitably bring additional errors, and the actual error should be the combination of basic error and additional error. So when selecting instruments, measures should be taken based on the possible problems that may occur on site. The on-site conditions have a significant impact on measurement accura

Can a cast iron elliptical gear flowmeter | liquid turbine flowmeter measure high viscosity liquids

1. Selection of Capacity Flow Meter Performance

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