HF Series HF SeriesHPHF Series HPHF SeriesHPST-4 Series HPST-4 SeriesHIGH PRESSURE AIR OPERATED FOR 1/4” & 3/8” APPLICATIONSHPST-8 Series HPST-8 SeriesHIGH PRESSURE AIR OPERATED FOR 3/8” & 1/2” APPLICATIONSST-4 Series ST-4 SeriesROUND HANDLE MANUAL FOR 1/4" AD 3/8" APPLICATIONSST-8 Series ST-8 SeriesROUND HANDLE MANUAL FOR 3/8” & 1/2” APPLICATIONSSTA Series STA SeriesROUND HANDLE MANUAL ANGLE PATTERN Series Use Industry: specialty gas specialty chemical semiconductor medical instrumentation general purpose Process: regulator outlet valves gas/fluid control panels manifold systems general shut-off