Kunkle 363

Kunkle Model 363 heavy duty safety valves cover 50 to 1,000 psig, the lower band of the 189/363/389 cryogenic family — the companion 189 picks up from 1,000 to 2,500 psig and the all-stainless 389 spans the whole range. Bronze SB-62 housing with stainless steel nozzle and disc, a three-piece disc assembly with a PTFE seat and seal for leak-free performance across the full range, and a control ring for precise blowdown adjustment. ½” or ¾” FNPT inlet with a ¾” FNPT outlet, −320°F to 350°F, relieving 38 to 607 SCFM of air. ASME Sections VIII and XIII with the ‘UV’ designator, National Board certified. Built for cryogenic and liquefied air, oxygen and gas service on multi-stage compressors, intercoolers, aftercoolers and receivers. Three versions: the 363 with a plain lift lever, the 363C with a pressure-tight threaded cap for gas service only, and the 363P with a packed lift lever. The 363C and 363P are limited to 50 psig maximum back pressure.