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900X-10-DN20,900X-10-DN25,900X-16-DN32,900X-16-DN40,00X-25-DN50,900X-25-DN65,900X-25-DN400,紧急关闭阀
一、产品结构特点：
900X紧急关闭阀有主阀、针阀、导阀、压力表以及接管等其他管件组成是一种用于消防用水与生活用水并联的供水系统中，用来调配供水方向的阀门。
当火灾发生时，消防急需大量用水，900X紧急关闭阀立即切断生活用水，确保足够的消防用水：当消防停止用水压力减小时．阀门自动打开，呈常开状态，恢复生活供水。该阀使系统无须另设专门的消防单独供水管网，大大地节约了建设成本和用水量。阀门控制灵敏度高，安全可靠，调试简便，使用寿命长。
二、工作原理：
当主阀进出口压力低于导阀设定的压力时，导阀此时处于开通状态，主阀上盖腔内压力与主阀出口压力相等，进口与出口存在压差，水流经阀口由出口流出。当消防泵启动，或变频泵压力升高，超过导阀设定压力时，由主阀进口通向导阀控制管压力升高，作用在弹簧上的压力增大，向下压紧，带动阀芯下移，使导阀关闭，此时主阀进口压力通过节流阀不断补充到主阀阀盖上腔，因阀瓣受到向下的压力大于向上的推力，主阀关闭。
值得注意的是，进口压力小于设定压力该阀一直处于开启状态，进口压力大于设定压力，该阀处于关闭状态。
三、主要技术参数：
|
公称压力（Mpa）
|
壳体试验压力（MPa）
|
密封试验压力（MPa）
|
适用介质
|
介质温度（℃）
|
|
1.0
|
1.5
|
1.1
|
水
|
0-80
|
|
1.6
|
2.4
|
1.76
|
||
|
2.5
|
3.75
|
2.75
|
四、主要零部件材质：
|
零件名称
|
零件材料
|
|
阀体 阀盖
|
铸铁、碳钢、不锈钢
|
|
阀座 阀盘
|
铜合金
|
|
密封圈 O型圈
|
丁腈橡胶
|
|
阀杆
|
2Cr13
|
|
弹簧
|
50CrVA
|
|
针型阀
|
铜合金
|
|
球阀
|
铜合金
|
|
浮球阀
|
铜合金
|
|
微型过滤器
|
不锈钢
|
|
DN
|
L
|
A
|
A1
|
H
|
H1
|
F
|
D
mm |
D1
mm |
D2
mm |
n-Φd
|
||||||||
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
PN1.0
|
PN1.6 |
PN2.5
|
PN1.0
|
PN1.6 |
PN2.5
|
PN1.0
|
PN1.6 |
PN2.5
|
PN1.0
|
PN1.6 |
PN2.5
|
|
|
20
|
180
|
292
|
136
|
342
|
247
|
116
|
105
|
105
|
105
|
75
|
75
|
75
|
58
|
58
|
56
|
4-13.5
|
4-13.5
|
4-14
|
|
25
|
180
|
292
|
136
|
342
|
247
|
116
|
115
|
115
|
115
|
85
|
85
|
85
|
68
|
68
|
65
|
4-13.5
|
4-13.5
|
4-14
|
|
32
|
180 |
292
|
136
|
342
|
247
|
116
|
140
|
140
|
140
|
100
|
100
|
100
|
78
|
78
|
76
|
4-17.5
|
4-17.5
|
4-18
|
|
40
|
240
|
330
|
155
|
395
|
278
|
170
|
150
|
150
|
150
|
110
|
110
|
112
|
88
|
88
|
84
|
4-17.5
|
4-17.5
|
4-18
|
|
50
|
240
|
330
|
155
|
395
|
278
|
170
|
165
|
165
|
165
|
125
|
125
|
125
|
102
|
102
|
99
|
4-17.5
|
4-17.5
|
4-18
|
|
65
|
250
|
350
|
165
|
405
|
298
|
180
|
185
|
185
|
185
|
145
|
145
|
145
|
122
|
122
|
118
|
4-17.5
|
4-17.5
|
8-18
|
|
80
|
285
|
365
|
175
|
430
|
313
|
210
|
200
|
200
|
200
|
160
|
160
|
160
|
133
|
133
|
132
|
8-17.5
|
8-17.5
|
8-18
|
|
100
|
360
|
410
|
195
|
510
|
350
|
275
|
220
|
220
|
235
|
180
|
180
|
190
|
158
|
158
|
156
|
8-17.5
|
8-17.5
|
8-22
|
|
125
|
400
|
455
|
220
|
560
|
365
|
310
|
250
|
250
|
270
|
210
|
210
|
220
|
184
|
184
|
184
|
8-17.5
|
8-17.5
|
8-26
|
|
150
|
455
|
475
|
230
|
585
|
420
|
355
|
285
|
285
|
300
|
240
|
240
|
250
|
212
|
212
|
211
|
8-22
|
8-22
|
8-26
|
|
200
|
585
|
530
|
255
|
675
|
450
|
460
|
340
|
340
|
360
|
295
|
295
|
310
|
268
|
268
|
274
|
8-22
|
12-22
|
12-26
|
|
250
|
650
|
623
|
300
|
730
|
470
|
500
|
395
|
405
|
425
|
350
|
355
|
370
|
320
|
320
|
330
|
12-22
|
12-26
|
12-30
|
|
300
|
800
|
700
|
340
|
760
|
490
|
580
|
445
|
460
|
485
|
400
|
410
|
430
|
370
|
370
|
389
|
12-22
|
12-26
|
16-30
|
|
350
|
860
|
840
|
415
|
840
|
526
|
640
|
505
|
520
|
555
|
460
|
470
|
490
|
430
|
430
|
448
|
16-22
|
16-26
|
16-33
|
|
400
|
960
|
880
|
430
|
910
|
570
|
715
|
565
|
580
|
620
|
515
|
525
|
550
|
482
|
482
|
503
|
16-26
|
16-30
|
16-36
|
|
450
|
1075
|
930
|
460
|
1030
|
610
|
780
|
615
|
640
|
670
|
565
|
585
|
600
|
532
|
550
|
548
|
20-26
|
20-30
|
20-36
|
|
500
|
1075
|
980
|
490
|
1135
|
665
|
830
|
670
|
715
|
730
|
620
|
650
|
660
|
585
|
585
|
609
|
20-26
|
20-33
|
20-36
|
|
600
|
1230
|
1060
|
530
|
1270
|
725
|
920
|
780
|
840
|
845
|
725
|
770
|
770
|
685
|
685
|
720
|
20-30
|
20-36
|
20-39
|
|
700
|
1650
|
1130
|
560
|
1460
|
865
|
980
|
895
|
910
|
960
|
840
|
840
|
875
|
800
|
800
|
820
|
24-30
|
24-36
|
24-42
|
|
800
|
1750
|
1230
|
610
|
1640
|
975
|
1050
|
1015
|
1025
|
1085
|
950
|
950
|
990
|
905
|
905
|
928
|
24-33
|
24-39
|
24-48
|
900X-10-DN20,900X-10-DN25,900X-16-DN32,900X-16-DN40,00X-25-DN50,900X-25-DN65,900X-25-DN400,紧急关闭阀
900X-10-DN32,900X-10-DN40,900X-10-DN50,900X-10-DN65,900X-10-DN80,
900X-10-DN100,900X-10-DN125,900X-10-DN150,900X-10-DN200,900X-10-DN250,900X-10-DN300,900X-10-DN350,
900X-10-DN400,CCLAIR,900X-10-DN450,900X-10-DN500,900X-10-DN600,
900X-16-DN20,900X-16-DN25,900X-16-DN50,900X-16-DN65,900X-16-DN80,
900X-16-DN100,900X-16-DN125,900X-16-DN150,900X-16-DN200,900X-16-DN250,900X-16-DN300,900X-16-DN350,
900X-16-DN400,900X-16-DN450,900X-16-DN500,900X-16-DN600,
900X-25-DN20,900X-25-DN25,900X-25-DN32,900X-25-DN40,9900X-25-DN80,
900X-25-DN100,CCLAIR,900X-25-DN125,900X-25-DN150,900X-25-DN200,900X-25-DN250,900X-25-DN300,900X-25-DN350,900X-25-DN450,900X-25-DN500,900X-25-DN600,
