双闸板闸阀
平行式双闸板闸阀适用于介质为水、污水的管路上作闭路设备用,不允许作调节流量和排空使用。广泛适用于石油、化工、制药、电力等行业。在公称压力≤l.0MPa的蒸汽、水、油类等介质的管路上作启闭用。有平行式双闸板闸阀、平行式单闸板闸阀、明杆平行式双闸板闸阀、明杆平行式单闸板闸阀。
工作原理
平行双闸板闸阀是陶瓷闸阀的一种。故其结构与工作原理与闸阀一致,其启闭体(阀板)由阀杆带动阀座密封面作升降运动,可接通或截断流体的通道。当阀门部分开启时,在闸板背面产生涡流,易引起闸板的侵蚀和震动,也易损坏阀座密封面,修理困难,通常适用于不需要经常启闭,而且保持闸板全开或全闭的工况。
平行双闸板阀的工作原理:借助气缸或手轮提供的外动力,阀杆带动阀板上下移动实现阀门的启闭,阀门启闭过程中依靠双闸板之间设置弹簧的预紧力是阀板和阀座紧密接触,实现密封。
优点
1. 当系统正常工作时,闸板以1.0m/min匀速启、闭;而系统断电等事故状态时的关闭分为快、慢关两个阶段。100-20%开度为快关,时间10(S)。20-0%开度为慢关,时间为40(S)。
2. 用在水泵出口作截止、止回阀使用,该阀还具有阀杆锁定装置。保证运行安全。
3. Z943T型闸阀选用新型电动装置,可就地操作也可远控,并能满足计算机程控要求。控制准确、安全、可靠。
150Lb连接尺寸和外形尺寸(mm)
公称通径NPS |
单位Unit |
L |
D |
T |
G |
C |
n-Ф |
W |
H |
|
in |
mm |
|||||||||
1/2〞 |
15 |
mm |
108 |
89 |
12 |
35 |
60.5 |
4-15 |
90 |
188 |
in |
4.25 |
3.5 |
0.47 |
1.38 |
2.38 |
4-0.59 |
3.54 |
7.40 |
||
3/4〞 |
20 |
mm |
117 |
98 |
12 |
43 |
70 |
4-15 |
90 |
202 |
in |
4.61 |
3.86 |
0.47 |
1.69 |
2.76 |
4-0.59 |
3.54 |
7.95 |
||
1〞 |
25 |
mm |
127 |
108 |
12 |
51 |
79.5 |
4-15 |
100 |
225 |
in |
5 |
4.25 |
0.47 |
2 |
3.13 |
4-0.59 |
4 |
8.86 |
||
11/2〞 |
40 |
mm |
165 |
127 |
14.3 |
73 |
98.5 |
4-16 |
200 |
362 |
in |
6.5 |
5 |
0.56 |
2.88 |
3.88 |
4-0.62 |
8 |
14.25 |
||
2〞 |
50 |
mm |
178 |
152 |
15.9 |
92 |
120.5 |
4-19 |
200 |
409 |
in |
7 |
6.00 |
0.625 |
3.62 |
4.75 |
4-0.75 |
8 |
16.1 |
||
21/2〞 |
65 |
mm |
190 |
178 |
17.5 |
105 |
139.5 |
4-19 |
250 |
500 |
in |
7.5 |
7 |
0.69 |
4.12 |
5.50 |
4-0.75 |
10 |
19.68 |
||
3〞 |
80 |
mm |
203 |
190 |
19.1 |
127 |
152.4 |
4-19 |
250 |
570 |
in |
8 |
7.50 |
0.75 |
5 |
6 |
4-0.75 |
10 |
22.58 |
||
4〞 |
100 |
mm |
229 |
229 |
23.9 |
157 |
190.5 |
8-19 |
250 |
590 |
in |
9 |
9 |
0.94 |
6.19 |
7.5 |
8-0.75 |
10 |
23.6 |
||
6〞 |
150 |
mm |
267 |
279 |
25.4 |
216 |
241.5 |
8-22 |
300 |
630 |
in |
10.50 |
11 |
1 |
8.5 |
9.50 |
8-0.88 |
12 |
24.8 |
||
8〞 |
200 |
mm |
292 |
343 |
28.5 |
270 |
298.5 |
8-22 |
350 |
960 |
in |
11.5 |
13.50 |
1.12 |
10.62 |
11.75 |
8-0.88 |
13.88 |
37.8 |
||
10〞 |
250 |
mm |
330 |
406 |
30.2 |
342 |
362 |
12-25 |
400 |
1158 |
in |
13 |
16 |
1198 |
12.75 |
14.75 |
12-1 |
15.7 |
45.6 |
||
12〞 |
300 |
mm |
356 |
483 |
31.8 |
381 |
432 |
12-25 |
450 |
1378 |
in |
14 |
19 |
1.25 |
15 |
17 |
12-1 |
17.7 |
54.3 |
||
14〞 |
350 |
mm |
381 |
533 |
35 |
413 |
476 |
12-29 |
500 |
1543 |
in |
15 |
21 |
1.38 |
16.25 |
18.75 |
12-1.2 |
79.7 |
60.75 |
||
16〞 |
400 |
mm |
406 |
597 |
36.6 |
470 |
539.5 |
16-29 |
600 |
1738 |
in |
16 |
23.5 |
1.44 |
18.5 |
21.25 |
16-1.12 |
23.6 |
68.4 |
300Lb连接尺寸和外形尺寸(mm)
公称通径NPS |
单位 |
L |
D |
T |
G |
C |
n-Ф |
W |
H |
|
in |
mm |
|||||||||
1/2〞 |
15 |
mm- |
140 |
95 |
15 |
35 |
66.5 |
4-15 |
100 |
201 |
in |
5.51 |
3.74 |
0.59 |
1.38 |
2.62 |
4-0.59 |
4 |
7.91 |
||
3/4〞 |
20 |
mm |
152 |
117 |
16 |
43 |
82.5 |
4-19 |
100 |
212 |
in |
5.98 |
4.61 |
0.62 |
1.69 |
3.25 |
4-0.75 |
4 |
8.35 |
||
1〞 |
25 |
mm |
165 |
124 |
18 |
51 |
89 |
4-19 |
140 |
237 |
in |
6.5 |
4.9 |
0.71 |
2 |
3.5 |
4-0.75 |
5.51 |
9.33 |
||
11/2〞 |
40 |
mm |
190 |
156 |
20.7 |
73 |
114.5 |
4-22 |
200 |
407 |
in |
7.5 |
6.12 |
0.81 |
2.88 |
4.51 |
4-0.88 |
8 |
16.02 |
||
2〞 |
50 |
mm |
216 |
165 |
22.3 |
92 |
127 |
8-19 |
200 |
424 |
in |
8.5 |
6.5 |
0.88 |
3.62 |
5 |
8-0.75 |
8 |
16.7 |
||
21/2〞 |
65 |
mm |
241 |
190 |
25.4 |
105 |
149 |
8-22 |
250 |
265 |
in |
9.5 |
7.5 |
1 |
4.12 |
5.87 |
8-0.88 |
10 |
18.31 |
||
3〞 |
80 |
mm |
283 |
210 |
28.5 |
127 |
168.5 |
8-22 |
250 |
535 |
in |
11.25 |
8.25 |
1012 |
5 |
6.62 |
8-0.88 |
10 |
21 |
||
4〞 |
100 |
mm |
305 |
254 |
31.8 |
157 |
200 |
8-22 |
250 |
615 |
in |
12 |
10 |
1.25 |
6.19 |
7.88 |
8-0.88 |
10 |
24.2 |
||
6〞 |
150 |
mm |
403 |
318 |
36.6 |
216 |
270 |
12-22 |
350 |
795 |
in |
15.875 |
12.5 |
1.44 |
8.5 |
10.62 |
12-0.88 |
140 |
31.3 |
||
8〞 |
200 |
mm |
419 |
381 |
41.3 |
270 |
330 |
12-25 |
400 |
1012 |
in |
16.5 |
15 |
1.62 |
10.62 |
12.99 |
12-1 |
15.7 |
39.9 |
||
10〞 |
250 |
mm |
457 |
444 |
47.7 |
342 |
387.5 |
16-29 |
450 |
1231 |
in |
18 |
17.50 |
1.88 |
12.75 |
15.25 |
16-1.12 |
17.7 |
48.5 |