CYLINDER VALVE AND BAYONET CHECK-FILTER WITH EXCESS-FLOW PROTECTION FEATURE

摘要

A valve apparatus 840) controlling flow between a high pressure zone (42 or43) and a low pressure zone (43 or 42), depending on whether the valve is usedfor discharge or filing, respectively, comprises a hollow body having athreaded handle engaging portion (19) and a main portion (20). Fluid flowbetween a first chamber (28 or 27) and a second chamber (27 or 28) iscontrolled by a stem (21) moving a seat (75) on the stem (21) into and out ofcontact with a nozzle (30). Rotation of handle (17) axially shifts the stem(21) without rotation thereof of move the seat (75) toward and away fromengagement with nozzle (30). The stem (21) includes a seal member (57) to sealthe threaded portion (19) from fluid contact with the controlled flow.