HD-OGFM type oval gear flowmeter is a direct-reading cumulative liquid flowmeter, which is widely used in the measurement and automatic control of liquid flow (total) or instantaneous flow in pipelines.Because of its large measuring range, high precision and stable performance. It can measure high-temperature and high-viscosity liquids, and has many advantages such as easy installation and convenient operation. It is suitable for liquid measurement in industrial sectors such as petroleum exploration, oil refining, chemical industry, commerce, and oil storage depots.