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H11H锻钢止回阀是指依靠介质本身流动而自动开、闭阀瓣，用来防止介质倒流的阀门，又称逆止阀、单向阀、逆流阀、和背压阀。止回阀属于一种自动阀门，其主要作用是防止介质倒流、防止泵及驱动电动机反转，以及容器介质的泄放。止回阀还可用于给其中的压力可能升至超过系统压的辅助系统提供补给的管路上。止回阀主要可分为旋启式止回阀（依重心旋转）与升降式止回阀（沿轴线移动）。
mso-hansi-font-family:"Times New Roman"">二、H11H "Times New Roman"">锻钢止回阀主要零件材料：
|
mso-hansi-font-family:"Times New Roman"">序号 |
mso-hansi-font-family:"Times New Roman"">零件名称 |
CStoASTM |
AStoASTM |
SStoASTM |
|
|
A105 |
F22 |
F304（L mso-hansi-font-family:"Times New Roman"">） |
F316（L mso-hansi-font-family:"Times New Roman"">） |
||
|
1 |
mso-hansi-font-family:"Times New Roman"">阀体 |
A105 |
A182F22 |
A182F304（L mso-hansi-font-family:"Times New Roman"">） |
A182F316（L mso-hansi-font-family:"Times New Roman"">） |
|
2 |
mso-hansi-font-family:"Times New Roman"">阀瓣 |
A276420 |
A276304 |
A276304（L mso-hansi-font-family:"Times New Roman"">） |
A276316（L mso-hansi-font-family:"Times New Roman"">） |
|
3 |
mso-hansi-font-family:"Times New Roman"">密封螺母 |
316夹柔性石墨 |
316夹PTFE |
||
|
4 |
mso-hansi-font-family:"Times New Roman"">密封圈 |
A105 |
A182F22 |
A182F304（L mso-hansi-font-family:"Times New Roman"">） |
A193 B8（M mso-hansi-font-family:"Times New Roman"">） |
|
5 |
mso-hansi-font-family:"Times New Roman"">固定螺母 |
SS |
|||
|
6 |
mso-hansi-font-family:"Times New Roman"">提升螺栓 |
A193B7 |
A193B16 |
A193B8（M mso-hansi-font-family:"Times New Roman"">） |
A193B8（M mso-hansi-font-family:"Times New Roman"">） |
|
mso-hansi-font-family:"Times New Roman"">适用介质 |
mso-hansi-font-family:"Times New Roman"">水、蒸汽、油品等 |
mso-hansi-font-family:"Times New Roman"">水、蒸汽、油品等 |
mso-hansi-font-family:"Times New Roman"">硝酸、醋酸等 |
||
|
mso-hansi-font-family:"Times New Roman"">适用温度 |
—29℃～425℃ |
—29℃～550℃ |
—29℃～200℃ |
||
mso-hansi-font-family:"Times New Roman"">注意：客户需求的其他材质也可采用。密封面材料配对由客户指定内件代号决定。
CS=碳钢;AS= mso-hansi-font-family:"Times New Roman"">合金钢;SS= "Times New Roman"">不锈钢;
mso-hansi-font-family:"Times New Roman"">三、H11H "Times New Roman"">锻钢止回阀主要外形尺寸：
|
NPS |
mso-hansi-font-family:"Times New Roman"">缩径 |
3/8” |
1/2” |
3/4” |
1” |
11/4” |
11/2” |
2” |
|
|
mso-hansi-font-family:"Times New Roman"">全径 |
|
3/8” |
1/2” |
3/4” |
1” |
11/4” |
11/2” |
2” |
|
|
L |
79 |
79 |
92 |
111 |
120 |
152 |
172 |
200 |
|
|
W |
61 |
61 |
65 |
79 |
95 |
103 |
118 |
132 |
|
|
mso-hansi-font-family:"Times New Roman"">重量 |
mso-hansi-font-family:"Times New Roman"">螺栓式 |
1.4 |
1.2 |
1.5 |
3.1 |
3.9 |
5.6 |
8.9 |
12.5 |
|
mso-hansi-font-family:"Times New Roman"">焊接式 |
1.1 |
1.0 |
1.2 |
2.9 |
3.3 |
4.9 |
8.1 |
10.9 |
|