铸钢法兰闸阀广泛应用于石油化工、火力发电厂等油品、水蒸气管道上作开启或关闭管道中的介质之用。
特征：
1、结构紧凑、设计合理、阀门刚性好、通道顺畅、流量系数小
2、密封面采用不锈钢和硬质合金，寿命长
3、柔性石墨填料，密封可靠，操作轻便灵活
4、驱动方式有手动、气动、电动、齿轮传动。
5、结构形式有弹性楔式单闸板、刚性楔式单闸板、双闸板。
执行标准：
设计规范：GB/T 12234
结构长度：GB/T 12221
连接法兰：JB/T 79.1
试验检验：JB/T 9092
压力-温度：GB/T 9131
产品标识：GB/T 12220
性能参数：
|
公称压力PN（MPa) |
Case |
试验压力（MPa) |
密封 |
|
|
Sealed (liquid) |
Seal (gas) |
|||
|
1.6 |
2.4 |
1.8 |
0.6 |
1.8 |
|
2.5 |
3.8 |
2.8 |
0.6 |
2.8 |
|
4.0 |
6.0 |
4.4 |
0.6 |
4.4 |
|
6.4 |
9.6 |
7.0 |
0.6 |
7.0 |
|
10.0 |
15.0 |
11.0 |
0.6 |
11.0 |
|
16.0 |
24.0 |
18.0 |
0.6 |
18.0 |
适用介质及适用温度：
|
外壳材质 |
适用介质 |
适用温度 (℃) |
|
Carbon steel (C type) |
Water, steam, oil |
≤425 |
|
Chromium nickel titanium steel (P type) |
Nitric acids |
≤200 |
|
Chrome nickel molybdenum titanium steel (R type) |
Acetic acid |
≤200 |
|
Chrome-molybdenum steel (type I) |
Water, steam, oil |
≤550 |
主要零件材质：
|
Body, bonnet |
Valve plate, seat |
Valve stem |
Stem nut |
Filler |
Handwheel |
|
Carbon steel |
High-quality carbon steel + carbide or stainless steel |
Chrome stainless steel |
Aluminum bronze |
Graphite asbestos packing |
Malleable iron |
|
Chromium nickel titanium steel |
Stainless steel, stainless steel + cemented carbide |
Chrome nickel-titanium stainless steel |
Aluminum bronze |
Teflon |
Malleable iron |
|
Chromium nickel molybdenum titanium steel |
Stainless steel, stainless steel + cemented carbide |
Chrome nickel-titanium stainless steel |
Aluminum bronze |
Teflon |
Malleable iron |
|
Chrome-molybdenum steel |
Alloy steel + Carbide |
Chrome-molybdenum steel |
Aluminum bronze |
Flexible asbestos |
Malleable iron |
