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截止阀是一种常用的截断阀，主要用来接通或截断管路中的介质，一般不用于调节流量。截止阀适用的压力、温度范围很大，但一般用于中、小口径的管道。
截止阀的主要优点：
1）与闸阀相比，截止阀的结构较简单，制造与维修都较方便。
2）密封面不易磨损、擦伤，密封性较好，寿命较长。
3）启闭时阀瓣行程较小，启闭时间较短，阀门高度较小。
主要零件材料及性能规范
|
主要零部件 |
阀体、阀盖 |
WCB |
ZG1Cr18Ni9Ti |
ZG1Cr18Ni12Mo2Ti |
ZG1Cr5Mo |
|
阀瓣 |
1Cr13 |
|
1Cr18Ni12Mo2Ti |
1Cr5Mo |
|
阀杆 |
1Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
1Cr5Mo |
|
阀杆螺母 |
ZguAL10Fe3/球墨铸铁 |
|
填料 |
柔性石墨、石墨石棉盘根 |
|
主要
参数 |
适用介质 |
蒸汽、油品、水等 |
硝酸类 |
醋酸类 |
蒸汽、油品、水等 |
|
适用温度℃ |
≤425 |
≤200 |
≤200 |
≤425 |
|
型号 |
公称 |
主要结构尺寸(mm) |
阀体材料 |
性能规范 |
|
通径DN(mm) |
压力
PN(MPa) |
D |
D0 |
L |
H |
适用温度(℃) |
适用介质 |
|
J941H-25 |
32 |
2.5 |
135 |
180 |
480 |
|
碳钢 |
≤425 |
蒸气、油品、水等 |
|
" |
40 |
" |
145 |
200 |
540 |
|
" |
" |
" |
|
" |
50 |
" |
160 |
230 |
645 |
|
" |
" |
" |
|
" |
65 |
" |
180 |
290 |
690 |
|
" |
" |
" |
|
" |
80 |
" |
195 |
310 |
715 |
|
" |
" |
" |
|
" |
100 |
" |
230 |
350 |
770 |
|
" |
" |
" |
|
" |
125 |
" |
270 |
400 |
782 |
|
" |
" |
" |
|
" |
150 |
" |
300 |
480 |
875 |
|
" |
" |
" |
|
" |
200 |
" |
360 |
600 |
968 |
|
" |
" |
" |
|
J941H-40 |
32 |
4.0 |
135 |
180 |
480 |
|
碳钢 |
≤425 |
蒸气、油品、水等 |
|
" |
40 |
" |
145 |
200 |
540 |
|
" |
" |
" |
|
" |
50 |
" |
160 |
230 |
645 |
|
" |
" |
" |
|
" |
65 |
" |
180 |
290 |
690 |
|
" |
" |
" |
|
" |
80 |
" |
195 |
310 |
715 |
|
" |
" |
" |
|
" |
100 |
" |
230 |
350 |
770 |
|
" |
" |
" |
|
" |
125 |
" |
270 |
400 |
782 |
|
" |
" |
" |
|
" |
150 |
" |
300 |
480 |
875 |
|
" |
" |
" |
|
" |
200 |
" |
375 |
600 |
968 |
|
" |
" |
" |
|
J941H-64 |
32 |
6.4 |
150 |
260 |
480 |
|
碳钢 |
≤425 |
蒸气、油品、水等 |
|
" |
40 |
" |
165 |
260 |
540 |
|
" |
" |
" |
|
" |
50 |
" |
175 |
300 |
710 |
|
" |
" |
" |
|
" |
65 |
" |
200 |
340 |
750 |
|
" |
" |
" |
|
" |
80 |
" |
210 |
380 |
785 |
|
" |
" |
" |
|
" |
100 |
" |
250 |
430 |
837 |
|
" |
" |
" |
|
" |
125 |
" |
295 |
|
|
|
" |
" |
" |
|
" |
150 |
" |
340 |
|
|
|
" |
" |
" |
|
" |
200 |
" |
405 |
|
|
|
" |
" |
" |
|
J941H-100 |
32 |
10.0 |
150 |
260 |
520 |
|
碳钢 |
≤425 |
蒸气、油品、水等 |
|
" |
40 |
" |
165 |
260 |
560 |
|
" |
" |
" |
|
" |
50 |
" |
195 |
300 |
710 |
|
" |
" |
" |
|
" |
65 |
" |
220 |
340 |
750 |
|
" |
" |
" |
|
" |
80 |
" |
230 |
380 |
785 |
|
" |
" |
" |
|
" |
100 |
" |
265 |
430 |
837 |
|
" |
" |
" |
|
" |
125 |
" |
310 |
|
|
|
" |
" |
" |
|
" |
150 |
" |
350 |
|
|
|
" |
" |
" |
|
" |
200 |
" |
430 |
|
|
|
" |
" |
" | |
