Neptune metering pump company was founded in 1961, the research and development of mechanical driven diaphragm metering pump and hydraulic driven diaphragm metering pump in water/wastewater treatment, irrigation, chemical technology, power generation, oil and gas, petrochemical and other industrial markets chemical agent filling has been widely used.

Neptune is a manufacturer of stoichiometric pumps, chemical supply systems and chemical solution delivery accessories. Neptune's hydraulic diaphragm metering pumps and mechanical diaphragm metering pumps are known for their chemical filling applications in a variety of industries. Neptune's other products include a reduction system for preparing and activating liquid or dry polymers for refilling in water/wastewater treatment processes, and a series of portable mixers.