The GRACO A23004 is a positive displacement plunger-type chemical injection pump designed for reliable, continuous chemical dosing in industrial applications. It features a 3/8" Chromex coated plunger for enhanced durability and HNBR (Hydrogenated Nitrile) seals for chemical resistance. This pump is intended for use in systems requiring precise and robust chemical injection, such as oilfield, mining, and industrial process equipment.