Gear pumps are a type of positive displacement (PD) pump. They move a fluid by repeatedly enclosing a fixed volume using interlocking cogs or gears, transferring it mechanically using a cyclic pumping action. Gear pumps deliver a smooth, pulse-free flow proportional to the rotational speed of the internal gears.

Pump & Valve are New Zealand agents for Roper as well as Oberdorfer gear pumps, offering bare pumps as well as close coupled gear pumps.