The present invention is directed to the high pressure processing of food products after packaging in order to extend the shelf life and eliminate bacteria and microorganisms. At cold system start-up, hydrogen is introduced into the cathode inlet header to be mixed with air so that a chemical reaction is provided by the catalyst that generates heat to warm the cooling fluid in the non-active inlet area. The fabric patterns on each of the diaphragms are aligned one with another upon installation into a pneumatic actuator. In one aspect, selected ones of the pilot blades include thereon, longitudinally between the pilot blades and the reaming blades, a pilot hole conditioning section including gage faces. One of the source and drain regions may be disposed at the bottom surface of the trench, and the other may be disposed at the top surface of the semiconductor layer, or vice versa.