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mso-hansi-font-family:"Times New Roman"">锻钢止回阀有三种阀盖设计形式. "Times New Roman"">第一种是螺栓式阀盖, "Times New Roman"">按这种设计形式设计的阀门, "Times New Roman"">其阀体与阀盖用螺栓螺母连接, "Times New Roman"">缠绕式垫片(316 "Times New Roman"">夹柔性石墨制造) "Times New Roman"">密封.客户有特殊要求时也可采用金属环连接. mso-hansi-font-family:"Times New Roman"">第二种设计形式是焊接式阀盖, "Times New Roman"">按这种设计形式的阀门, "Times New Roman"">其阀体与阀盖用螺纹连接, "Times New Roman"">全焊密封.客户有特殊要求时也可采用透焊连接. mso-hansi-font-family:"Times New Roman"">第三种是压力自紧式阀盖, "Times New Roman"">按这种设计形式设计的阀门, "Times New Roman"">其阀体与阀盖用螺纹连接, "Times New Roman"">内压自密环密封.
mso-hansi-font-family:"Times New Roman"">止回阀存在三种不同的设计结构, "Times New Roman"">它们是升降式止回阀, "Times New Roman"">球式止回阀和旋启式止回阀.
mso-hansi-font-family:"Times New Roman"">止回阀制造标准
mso-hansi-font-family:"Times New Roman"">止回阀的设计与制造符合MSSP-118 "Times New Roman"">和ASME B16.34. "Times New Roman"">检验与测试按API 598, "Times New Roman"">标记按MSS-SP-25.
mso-hansi-font-family:"Times New Roman"">承插端符合ASME B16.11, mso-hansi-font-family:"Times New Roman"">螺纹连接端 (NPT) "Times New Roman"">符合ANSI/ASME B1.20.1
mso-hansi-font-family:"Times New Roman"">主要连接尺寸(MM) "Times New Roman"">和重量(KG) 800Lb
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mso-hansi-font-family:"Times New Roman"">规格 |
mso-hansi-font-family:"Times New Roman"">缩径 |
3/8" |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
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mso-hansi-font-family:"Times New Roman"">通径 |
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3/8" |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
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L |
79 |
79 |
92 |
111 |
120 |
152 |
172 |
200 |
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H |
61 |
61 |
65 |
79 |
95 |
103 |
118 |
132 |
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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 |
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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 |
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mso-hansi-font-family:"Times New Roman"">主要连接尺寸(MM) "Times New Roman"">和重量(KG) 900Lb~1500Lb
|
mso-hansi-font-family:"Times New Roman"">规格 |
mso-hansi-font-family:"Times New Roman"">缩径 |
3/8" |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
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|
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mso-hansi-font-family:"Times New Roman"">通径 |
|
3/8" |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
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|
L |
92 |
111 |
111 |
120 |
152 |
172 |
200 |
220 |
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H |
65 |
79 |
79 |
97 |
104 |
120 |
139 |
215 |
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mso-hansi-font-family:"Times New Roman"">重量 |
mso-hansi-font-family:"Times New Roman"">螺栓式 |
1.6 |
3.4 |
3.3 |
5.5 |
6.0 |
9.2 |
12.9 |
16.2 |
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mso-hansi-font-family:"Times New Roman"">焊接式 |
1.3 |
3.2 |
3.1 |
4.8 |
5.4 |
8.5 |
11.2 |
14.3 |
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