SINGLE STAGE, FOUR-PORT, CHROME-PLATED BRASS BARSTOCK, CYLINDER REGULATOR FOR ULTRA HIGH PURITY APPLICATIONS FEATURING A 316L STAINLESS STEEL DIAPHRAGM; MAXIMUM DELIVERY PRESSURE OF 50 PSIG (3.5 BAR); 1/4-INCH FPT PORT OUTLET; 1/4-INCH FPT INLET; 0-4000 PSI/0-28,000 KPA DUAL-SCALE INLET GAUGE; 30VAC-0-100 PSI/-100VAC-0-700 KPA DUAL-SCALE OUTLET GAUGE; MAXIMUM INLET PRESSURE OF 3000 PSIG (210 BAR); FULL FUNCTIONAL TEST AND SPECTROMETRIC HELIUM LEAK CHECK AS AN ASSEMBLY; COMPLIANCE WITH CGA E-4 (INCLUDING 10,000+ CYCLE LIFE); CLEANLINESS EXCEEDING CGA G-4.1; PROOF PRESSURE 1.5X MAXIMUM WORKING PRESSURE AND BURST PRESSURE AT LEAST 4X MAXIMUM WORKING PRESSURE (CRN-LISTED).