Rear ports with Viton seals and 1 .25 keyed shaft, left hand rotation

Ensures maximum pump flow until unit reaches preset control pressure setting then regulates output flow to match the requirements of the system while maintaining preset output pressure. Can be adjusted from 750 psi (52 bar) working pressure up to the maximum pressure rating of the applicable pump. 2500 psi maximum adjustment of compensator. STILL IN ORIGINAL BOX FROM FACTORY