Manual Dosing System 30 LPH Manual Dosing System  Dosing generally applies to feeding chemicals or medicines when used in small quantities. For medicines the term dose is generally used. In the case of inanimate objects the word dosing is typical. dosing pump, which is a positive displacement pump, is designed to inject a chemical or another substance into a flow of water, gas, or steam. Dosing pumps, which are typically small, provide an extremely precise flow rate for maximum controlCompact modular design.1% accuracy dosing rate within 10-100% of the nominal flowrate.Check valve with double balls designed for easy maintenance.Easy parts replacement.Multiple layers diaphragm, ensure longer lifespan.