STAINLESS STEEL CHECK VALVE (NON-RETURN VALVES), USED FOR HIGH PURITY GASES IN THE SEMICONDUCTOR INDUSTRY. THESE VALVES HAVE AN EXTERNAL DIAMETER OF NOT MORE THAN 37MM AND AN OPENING PRESSURE OF NOT MORE THAN 800KpA.

GIR'S 1 AND 6 HSEN'S TO 8481 TEXT OF HEADING 8481