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闸阀是最常用的截断阀之一，主要用来接通或截断管路中的介质，不适用于调节介质流量。闸阀适用的压力、温度及口径范围很大，尤其适用于中、大口径的管道。
闸阀的主要优点：
1、流体阻力小。闸阀闸体内部介质通道是直通的，介质流经闸阀时不改变其流动方向，因而流动阻力较小。
2、启闭较省力。启闭时闸板运动方向与介质流动方向相垂直。与截止阀相比，闸阀的启闭较为省力。
3、介质流动方向一般不受限制。介质可从闸阀两侧任意方向流过，均能达到接通或截断的目的。便于安装，适用于介质的流动方向可能改变的管路中。
耐热钢楔式闸阀主要零件材料及性能规范：
|
主要零部件
|
阀体、阀盖、闸板
|
WCB
|
ZG1Cr18Ni9Ti
|
ZG1Cr18Ni12Mo2Ti
|
ZG2Cr5Mo
|
|
阀杆
|
1Cr13
|
1Cr18Ni9Ti
|
0Cr18Ni12Mo2Ti
|
20Cr1Mo1V1
|
|
阀杆螺母
|
ZguAL10Fe3/球墨铸铁
|
|
填料
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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
|
|
适用适用温度℃
|
≤425
|
≤200
|
≤200
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≤425
|
耐热钢楔式闸阀主要外形连接尺寸：
|
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
|
H1
|
H2
|
适用温度℃
|
适用介质
|
|
Z40Y、Z41Y-16I
|
50
|
1.6
|
160
|
200
|
250
|
185
|
240
|
ZGCr5Mo
|
≤550
|
蒸汽、油品、水
|
|
|
65
|
"
|
180
|
200
|
270
|
240
|
20
|
"
|
"
|
"
|
|
"
|
80
|
"
|
195
|
250
|
280
|
350
|
395
|
"
|
"
|
"
|
|
"
|
100
|
"
|
215
|
250
|
300
|
370
|
480
|
"
|
"
|
"
|
|
"
|
150
|
"
|
280
|
300
|
350
|
560
|
720
|
"
|
"
|
"
|
|
"
|
200
|
"
|
335
|
350
|
400
|
735
|
955
|
"
|
"
|
"
|
|
"
|
250
|
"
|
405
|
400
|
450
|
880
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1150
|
"
|
"
|
"
|
|
"
|
300
|
"
|
460
|
450
|
500
|
1050
|
1375
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"
|
"
|
"
|
|
"
|
350
|
"
|
520
|
500
|
550
|
1195
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1565
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"
|
"
|
"
|
|
"
|
400
|
"
|
580
|
550
|
600
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1335
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1760
|
"
|
"
|
"
|
|
"
|
500
|
"
|
705
|
600
|
700
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1720
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2270
|
"
|
"
|
"
|
|
"
|
600
|
"
|
840
|
650
|
800
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1830
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2480
|
"
|
"
|
"
|
|
"
|
700
|
"
|
910
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|
900
|
|
|
"
|
"
|
"
|
|
Z40Y、Z41Y-25I
|
50
|
2.5
|
160
|
200
|
250
|
185
|
240
|
ZGCr5Mo
|
≤550
|
蒸汽、油品、水
|
|
"
|
65
|
"
|
180
|
200
|
270
|
240
|
320
|
"
|
"
|
"
|
|
"
|
80
|
"
|
195
|
250
|
280
|
305
|
395
|
"
|
"
|
"
|
|
"
|
100
|
"
|
230
|
250
|
300
|
370
|
480
|
"
|
"
|
"
|
|
"
|
150
|
"
|
300
|
300
|
350
|
560
|
720
|
"
|
"
|
"
|
|
"
|
200
|
"
|
360
|
360
|
400
|
735
|
955
|
"
|
"
|
"
|
|
"
|
250
|
"
|
425
|
425
|
450
|
880
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1160
|
"
|
"
|
"
|
|
"
|
300
|
"
|
485
|
485
|
500
|
1080
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1405
|
"
|
"
|
"
|
|
"
|
350
|
"
|
550
|
550
|
550
|
1210
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1580
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"
|
"
|
"
|
|
"
|
400
|
"
|
610
|
610
|
600
|
1345
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1780
|
"
|
"
|
"
|
|
"
|
500
|
"
|
730
|
730
|
700
|
1740
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2290
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"
|
"
|
"
|
|
"
|
600
|
"
|
840
|
650
|
800
|
1850
|
2500
|
"
|
"
|
"
|
|
"
|
700
|
"
|
955
|
|
900
|
|
|
"
|
"
|
"
|
|
Z40Y、Z41Y-40I
|
50
|
4
|
160
|
250
|
250
|
220
|
295
|
ZGCr5Mo
|
≤550
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蒸汽、油品、水
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|
"
|
65
|
"
|
180
|
250
|
280
|
290
|
365
|
"
|
"
|
"
|
|
"
|
80
|
"
|
195
|
300
|
310
|
360
|
450
|
"
|
"
|
"
|
|
"
|
100
|
"
|
230
|
300
|
350
|
450
|
570
|
"
|
"
|
"
|
|
"
|
150
|
"
|
300
|
350
|
450
|
620
|
790
|
"
|
"
|
"
|
|
"
|
200
|
"
|
375
|
400
|
550
|
830
|
1050
|
"
|
"
|
"
|
|
"
|
250
|
"
|
445
|
450
|
650
|
950
|
1235
|
"
|
"
|
"
|
|
"
|
300
|
"
|
510
|
500
|
750
|
1120
|
1450
|
"
|
"
|
"
|
|
"
|
350
|
"
|
570
|
550
|
850
|
1560
|
1940
|
"
|
"
|
"
|
|
"
|
400
|
"
|
655
|
600
|
950
|
1770
|
2200
|
"
|
"
|
"
|
|
"
|
500
|
"
|
755
|
680
|
1050
|
1880
|
|
"
|
"
|
"
|
|
Z40Y、Z41Y-64I
|
50
|
6.4
|
175
|
300
|
250
|
240
|
320
|
ZGCr5Mo
|
≤550
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蒸汽、油品、水
|
|
"
|
65
|
"
|
200
|
300
|
280
|
310
|
390
|
"
|
"
|
"
|
|
"
|
80
|
"
|
210
|
350
|
310
|
380
|
470
|
"
|
"
|
"
|
|
"
|
100
|
"
|
250
|
350
|
350
|
470
|
590
|
"
|
"
|
"
|
|
"
|
150
|
"
|
340
|
400
|
450
|
640
|
810
|
"
|
"
|
"
|
|
"
|
200
|
"
|
405
|
450
|
550
|
850
|
1070
|
"
|
"
|
"
|
|
"
|
250
|
"
|
470
|
500
|
650
|
1000
|
1270
|
"
|
"
|
"
|
|
Z40Y、Z41Y-64I
|
300
|
6.4
|
530
|
550
|
750
|
1210
|
1550
|
ZGCr5Mo
|
≤550
|
蒸汽、油品、水
|
|
Z40Y-、Z41Y100I
|
50
|
10
|
195
|
300
|
250
|
260
|
340
|
ZGCr5Mo
|
≤550
|
蒸汽、油品、水
|
|
"
|
65
|
"
|
220
|
300
|
280
|
330
|
410
|
"
|
"
|
"
|
|
"
|
80
|
"
|
230
|
350
|
310
|
400
|
490
|
"
|
"
|
"
|
|
"
|
100
|
"
|
265
|
350
|
350
|
490
|
610
|
"
|
"
|
"
|
|
"
|
150
|
"
|
350
|
400
|
450
|
660
|
830
|
"
|
"
|
"
|
|
"
|
200
|
"
|
430
|
450
|
550
|
1100
|
1320
|
"
|
"
|
"
|
|
"
|
250
|
"
|
500
|
500
|
650
|
1300
|
1580
|
"
|
"
|
"
|
|
"
|
300
|
"
|
585
|
550
|
750
|
1480
|
1810
|
"
|
"
|
"
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注：法兰尺寸标准按JB/T79-1994。
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