A pan tilt zoom (PTZ) camera system implements a disc valve system to enhance the cooling of electronics. The disc valve system includes a static camera base and a rotating camera pan bearing. The static camera base has static base vent slots arranged along the perimeter of the static camera base. The rotating camera pan bearing includes at least one pan bearing vent slot that aligns with the static base vent slots. During rotation of the rotating camera pan bearing, the at least one pan bearing vent slot aligns with the static base vent slots enabling movement of air over electronics of the (PTZ) camera system.