Dairy Pulsators are one of the basic components of any milking machine. Pulsators can either be vacuum or electrically operated. As the pulsator operates, it causes the chamber between the shell and the liner to alternate regularly from vacuum to air source. The milking process then consists of opening (milk phase) and closing (massage phase) the teat-cup liner over and over again.  A variety of pulsators to fit your needs including vacuum pulsators, electronic pulsators, electric pulsators, alternating pulsators, pulsation controllers & pulsator repair kits can be found at Farm & Ranch Depot!