鍛鋼止回閥的結構設計和規范： 止回閥制造按MSS SP-118,BS5352,ANSI/ASME B16.34,試驗與驗收按API 598,標識按照MSS SP-25. 結構型式如下：
1.全通徑或縮徑；
2.立升式止回閥
3.球形止回閥
4.旋啟式止回閥
5.可按要求采用彈簧輔助復位
6.采用纏繞式墊片的螺栓型閥蓋、螺紋密封焊接型閥蓋，或自密封閥蓋
7.承插焊接ANSI/ASME B16.11
8.螺紋端(NPT端)按ANSI/ASME B1.20.1 材料表： 序號NO. | 名 稱 | 美標碳鋼CS to ASTM | 美標合金鋼AS to ASTM | 美標不銹鋼鋼SS to ASTM | Part Name | Type A 105 | Type F22 | Type F304(L) | Type F316(L) | 1 | 閥體 | Body | A105 | A182 F22 | A182 F304(L) | A182 F316(L) | 2 | 立升式閥瓣 | Piston Disc | A276 410 | A276 304 | A276 F304(L) | A276 F316(L) | 3 | 墊片 | Gasket | Corrugated SS+graphite | SS+PTFE | 4 | 閥蓋 | Bonnet | A105 | A182 F22 | A182 F304(L) | A182 F316(L) | 5 | 銘牌 | Nameplate | | 6 | 螺栓 | Bolt | A193 B7 | A193 B16 | A193 B8M | A193 B8M | 7 | 球 | Ball | A182 F304 | A182 F304 | A182 F304 | A182 F304 | | 適用介質 Suitable Medium | (水、油、氣等)W.O.G.etc | (酸類)HNO3,CH3OOH etc | 適用溫度Suitable Temperature | -29℃～425℃ | -29℃～550℃ | -29℃～180℃ |
注：可按要求采用其他材料 Note:Other materials are available upon request.
CS=碳鋼 AS=合金鋼 SS=不銹鋼 CS=Carbon Steel;AS=Alloy Steel;SS=Stainless Steel
尺寸和重量表 Dimensions(mm)and Weights(Kg) 通徑 | 縮徑RB | 3/8 | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | | NPS | 全徑FB | | 3/8 | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | L | 150～800Lb | 79 | 79 | 92 | 111 | 120 | 152 | 172 | 200 | | 111 | 111 | 111 | 130 | 152 | 172 | 220 | 220 | H(OPEN) | 150～800Lb | 61 | 61 | 65 | 79 | 95 | 103 | 118 | 132 | 900～1500Lb | 65 | 79 | 79 | 97 | 104 | 120 | 139 | 215 | Weights | Bolted | 150～800Lb | 1.4 | 1.2 | 1.5 | 3.1 | 3.9 | 5.6 | 8.9 | 12.5 | 900～1500Lb | 1.6 | 3.4 | 3.3 | 5.5 | 6.0 | 9.2 | 12.9 | 16.2 | Welded | 150～800Lb | 1.1 | 1.0 | 1.2 | 2.9 | 3.3 | 4.9 | 8.1 | 10.9 | 900～1500Lb | 1.3 | 3.2 | 3.1 | 4.8 | 5.4 | 8.5 | 11.2 | 14.3 |
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