ACS' replacement pressure regulator 406929 is set with a pressure rating of 100 psi direct from the factory. The pressure set screw on top of the valve housing allows you to manipulate the operating pressure of your air compressor. The minimal pressure rating on this particular valve is 75 psi. The maximum pressure rating for the 406929 valve is 175 psi. If you have any questions regarding the pressure adjustment, please call the experienced and knowledgeable Air Compressor Services' sales team.