These pulsators are direct aftermarket replacement for the Delaval pulsators. There are two types of pulsators; model 100 uses a control box to operate all the pusators at the same time, rate & ratio are set in the controller for all pulsators. And model 200 which act independently and do not require a controller, these pulsators have an “On-Board” circuit board which sets the rate & ratio at the pulsator.
There are two mounting options:
B= Bayonet (mounts by turning 1/4 turn) and
SC= Stall Cock (mounts by pushing onto a DeLaval Stall Cock)