The straight guidance of the piston in the cylinder, between top dead centre and bottom dead centre, ensures that the piston sealing rings are evenly loaded all around. In contrast to tilting movements, this achieves a long service life for the piston sealing rings.
In the flange pump housing the drive shaft is supported on both sides of the linear drive. The force transfer with the drive motor is implemented by means of a slide-on coupling on the pump shaft and motor shaft. Oscillating weights and the counterbalance weight are integrated into the pump-side section of the coupling.
The interconnecting of the cylinder is implemented by means of VA tubes. Note: ML and KL pumps with linear drives can be constructed with 1, 2 and 4 cylinders and as double pumps with up to 8 cylinders.