Dual pumps is a mode of operating two pumps, together to achieve a fluid outcome.
Dual pumps are used to create some form of reciprocating pumping action of a fluid.
The pumps used are standard pumps and are configured in dual pump mode using either a serial connection cable or a ttl logic level cable.
For example. Infuse a fluid into a vessel with one pump. The the second member of the dual pump set withdraws some or all of the infused fluid depending on the application.