Gray cast iron valve used for nominal pressure PN 1 or less. 0 mpa, the working temperature of 10 ~ 200 ℃ water, steam, air, oil and oil products such as medium gray cast iron valve, the selection of the major parts material as shown in the table 1: major parts of the Industrial Valves 'table 1' gray cast iron parts material selection table name material name brand standards, valve body, valve cover, opening and closing parts, grey cast iron HT200, HT250GB/T - 12226 1989 ht300, 1 cr13 HT350 stem, chromium stainless steel shaft, 2 cr13, cr13gb/T 1220-3 Aluminum bronze QA19-1992 2、QA19- 4 gb / T 4423 - Manganese brass HMn58-1992 2 gb / T 4423 - 1992 sleeves cast aluminum bronze ZCuA19Mn2, ZCuA19Fe4Mn2GB/T - 1176 1987 manganese brass ZCuZn38Mn2Pb2 rocker carbon cast steel WCA, WCB, WCCGB/T - 12229 1989 quality carbon steel 20, 25, gb/T 699-35 Spring spring steel 50 crvagb/T 1222-1999 199260 60 si2mn, 1 cr18ni9 si2mna float austenitic stainless steel, cr18ni9tigb/T 1220-1 19920-1 cr18ni9ti, 1 cr18ni9 cr17ni3mo2ti screen pack, 1 cr18ni9ti seat, opening and closing the sealing surface of aluminum brass ZCuZn25A16Fe3Mn3GB/T - 1176 1987 aluminum bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 cast manganese brass ZCuZn38Mn2Pb2 1 cr13 stainless steel, 2 cr13, cr13gb/T 1220-3 19921 cr18ni9, 1 cr18ni9ti heap soldering tin brass wire - 221 Ptfe SFB - 1、SFB- 2、SFB- 3 hg2 - 534SFBN- 1、SFBN- 2、SFBN- 3 hg2 - 535 rubber - - Stem nut aluminum brass ZCrZn25A1Fe3Mn3GB/T - 1176 1987 aluminum bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 cast manganese brass ZCrZn38Mn2Pb2 filler ptfe SFT - 1平米, 2平米, 2平米, 4HG2- Corrosion asbestos - 538 - Rubber - - Ptfe asbestos rope - - Flexible graphite - - The handwheel malleable iron KTH330 - 08年,HTH350 - 10 gb / T 9440 - Nodular cast iron QT400-1988 15日,QT450 - 10 gb / T 12227 - Note: 1989 grey cast iron is generally used in nominal pressure PN 1 or less. 0 mpa, but for the DN 200 mm or less cut-off valve and lift check valves, also can be used in the nominal pressure PN = 1. 6MPa。
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