|
日标止回阀阀瓣绕转轴作旋转运动，其流体阻力一般小于升降式止回阀，它适用于较大口径的场合，安装位置不受限制，通常安装于水平管路，它适用与较大口径的场合。根据阀瓣的数目可分为单瓣旋启式、双瓣旋启式及多瓣旋启式三种。单瓣旋启式止回阀一般使用与中等口径的场合。大口径管路选用单瓣旋启式止回阀时，为减小水锤压力，最好采用能减小水锤压力的缓闭止回阀。双瓣旋启式止回阀适用与大中口径管路。对夹双瓣旋启式止回阀结构小、重量轻，是一种较快的止回阀；多瓣旋启式止回阀适用与大口径管路.
日标止回阀主要零件及材质
|
零件名称
|
Qty.
|
材料
|
NO.
|
零件名称
|
Qty.
|
材料
|
|
阀体
|
1
|
WCB
|
9
|
铭牌
|
1
|
304
|
|
阀座
|
2
|
A105+HF
|
10
|
垫片
|
1
|
304不锈钢+柔性石墨
|
|
闸瓣
|
1
|
WCB+F6
|
11
|
阀盖
|
1
|
WCB
|
|
阀杆
|
1
|
WCB
|
12
|
螺柱
|
|
A193B7
|
|
垫片
|
1
|
A276410
|
13
|
螺母
|
|
A1942H
|
|
螺母
|
1
|
A276410
|
14
|
吊环
|
1
|
A291035
|
|
销轴
|
1
|
A276410
|
15
|
垫片
|
1
|
1008
|
|
铆钉
|
2
|
304
|
16
|
螺塞
|
1
|
A276410
|
日标止回阀主要连接尺寸及重量
|
NPS
d
|
in
|
2
|
2-1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
16
|
18
|
20
|
|
mm
|
51
|
64
|
76
|
102
|
127
|
152
|
203
|
254
|
305
|
337
|
387
|
438
|
489
|
|
L-L1
(RF-BW)
|
in
|
8.00
|
8.50
|
9.50
|
11.50
|
13.00
|
14.00
|
19.50
|
24.50
|
27.50
|
31.00
|
34.00
|
38.50
|
38.50
|
|
mm
|
203
|
216
|
241
|
292
|
330
|
356
|
495
|
622
|
698
|
787
|
864
|
978
|
978
|
|
L2
(RTJ)
|
in
|
8.50
|
9.00
|
10.00
|
12.00
|
13.50
|
14.50
|
20.00
|
25.00
|
28.00
|
31.50
|
34.50
|
39.00
|
39.00
|
|
mm
|
216
|
229
|
254
|
305
|
343
|
368
|
508
|
635
|
711
|
800
|
876
|
991
|
991
|
|
d1
|
in
|
3.62
|
4.13
|
5.00
|
6.18
|
7.32
|
8.50
|
10.63
|
12.76
|
15.00
|
16.26
|
18.50
|
20.98
|
22.99
|
|
mm
|
92
|
105
|
127
|
157
|
186
|
216
|
270
|
324
|
381
|
413
|
470
|
533
|
584
|
|
d2
|
in
|
4.75
|
5.50
|
6.00
|
7.50
|
8.50
|
9.50
|
11.75
|
14.25
|
17.00
|
18.75
|
21.25
|
22.75
|
25.00
|
|
mm
|
120.5
|
139.5
|
152.5
|
190.5
|
216
|
241.5
|
298.5
|
362
|
432
|
476
|
540
|
578
|
635
|
|
D
|
in
|
6.00
|
7.00
|
7.50
|
9.00
|
10.00
|
11.00
|
13.50
|
16.00
|
19.00
|
21.00
|
23.50
|
25.00
|
27.50
|
|
mm
|
152
|
178
|
190
|
229
|
254
|
279
|
343
|
406
|
483
|
533
|
597
|
635
|
699
|
|
b
|
in
|
0.75
|
0.88
|
0.94
|
0.94
|
0.94
|
1.00
|
1.13
|
1.19
|
1.25
|
1.38
|
1.44
|
1.56
|
1.69
|
|
mm
|
16
|
17.5
|
19
|
24
|
25
|
26
|
29
|
31
|
32
|
35
|
37
|
40
|
43
|
|
n-Φd
|
in
|
4-0.75
|
4-0.75
|
4-0.75
|
8-0.75
|
80.87
|
-0.87
|
8-0.87
|
12-1.00
|
12-1.00
|
12-1.13
|
16-1.13
|
16-1.25
|
20-1.25
|
|
mm
|
4-19
|
4-19
|
4-19
|
8-19
|
8-22
|
8-22
|
8-22
|
12-25
|
12-25
|
12-29
|
16-29
|
16-32
|
20-32
|
|
H
(open)
|
in
|
5.31
|
6.10
|
6.61
|
9.37
|
9-80
|
10.91
|
13.35
|
15.67
|
20.67
|
21.77
|
22-99
|
26.30
|
28.03
|
|
mm
|
135
|
155
|
168
|
235
|
249
|
277
|
339
|
398
|
525
|
553
|
584
|
688
|
712
|
|
WT(kg)
|
BF
|
17
|
21
|
29
|
42
|
69
|
74
|
108
|
177
|
282
|
372
|
570
|
665
|
900
|
|
BW
|
13
|
17
|
24
|
36
|
57
|
62
|
96
|
158
|
238
|
324
|
483
|
48
|
782
|
|
