TOPSFLO micro diaphragm liquid  pumps are based on a simple principal, the circular power from the motor is converted into oscillating movement by an eccentric, which moves up and down its central point, this motion is then transfer redto a diaphragm by means of a connecting rod, an elastic diaphragm, which in conjunction with an inlet and outlet valve creates a pumping action.

TF 22 pumps can be mounted in any position and can deliver up to 300 ml/min depending on the model and will operate against pressures of up to 3 bar.