4、阀杆防飞结构：阀杆为下装式，防止受压飞出，同时可在火灾后，与阀体形成金属接触，确保阀杆密封。
二、Q41H硬密封球阀主要材料：
|
序号 |
材料 |
材料牌号 |
|||
|
碳钢 |
不锈钢 |
||||
|
GB |
ASTM |
GB |
ASTM |
||
|
01 |
阀体 |
WCB |
A216-WCB |
ZG1Cr18Ni9Ti |
CF8/CF8M/ |
|
02 |
阀盖 |
WCB |
A216-WCB |
ZG1Cr18Ni9Ti |
CF8/CF8M/ |
|
03 |
双头螺柱 |
35CrMoA |
A193-B7 |
1Cr17Ni2 |
A193-B8M |
|
04 |
螺母 |
45 |
A194-2H |
0Cr18Ni |
A194-8M |
|
05 |
垫圈 |
金属夹石墨 |
|||
|
06 |
球体 |
2Cr13渗氮 |
A276-410渗氮 |
1Cr18Ni9Ti |
F304/F316 |
|
07 |
阀座 |
2Cr13渗氮 |
A276-410渗氮 |
1Cr18Ni9Ti |
F304/F316 |
|
08 |
阀座支承圈 |
2Cr13 |
A276-410 |
1Cr18Ni9Ti |
F304/F316 |
|
09 |
阀座弹簧 |
17-7PH |
17-7PH |
17-7PH |
17-7PH |
|
10 |
阀座密封圈 |
石墨 |
|||
|
11 |
阀杆 |
2Cr13 |
A276-410 |
1Cr18Ni9Ti |
F304/F316 |
|
12 |
止推轴承 |
金属夹PTFE |
|||
|
1, 3 |
阀杆填料 |
石墨 |
|||
|
14 |
填料压环 |
2Cr13 |
A276-410 |
1Cr18Ni9Ti |
F304/F316 |
|
15 |
填料压盖 |
WCB |
A216-WCB |
ZG1Cr18Ni9Ti |
CF8/CF8M/ |
|
16 |
螺钉 |
35CrMoA |
A193-B7 |
1Cr17Ni2 |
A193-B8M |
|
17 |
定位板 |
2Cr13 |
A276-410 |
1Cr18Ni9Ti |
304 |
