直流式柱塞閥概述：
主要直流式柱塞閥最大的優點是介質在內流動平衡轉彎拐角少。直通式流線為梯形角式流線為角形而直流式流線為波浪形，根據對三種截止閥，流阻系數的測定DN100mm，直通式截止閥流阻系數為4.1 ，DN100mm角式截止閥流阻系數為3.8，而DN100mm直流式截止閥流阻系數為0.5,阻力大大降低。
直流式柱塞閥連接、結構尺寸：
|
DN(mm)
尺寸（mm）
|
U45SM-16C、P、R U45H-16C、P、R
|
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
400
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
622
|
698
|
787
|
914
|
|
H
|
180
|
200
|
220
|
260
|
280
|
310
|
350
|
390
|
430
|
460
|
550
|
650
|
750
|
860
|
980
|
1110
|
|
W
|
100
|
100
|
120
|
140
|
160
|
180
|
200
|
240
|
270
|
310
|
340
|
400
|
520
|
640
|
760
|
900
|
|
D
|
95
|
105
|
115
|
135
|
145
|
160
|
180
|
195
|
215
|
245
|
280
|
335
|
405
|
460
|
520
|
580
|
|
K
|
65
|
75
|
85
|
100
|
110
|
125
|
145
|
160
|
180
|
210
|
240
|
295
|
355
|
410
|
470
|
525
|
|
T
|
12
|
12
|
12
|
12
|
13
|
13
|
12
|
17
|
17
|
19
|
21
|
23
|
27
|
28
|
30
|
32
|
|
n-φ
|
4-14
|
4-14
|
4-14
|
4-18
|
4-18
|
4-18
|
4-18
|
8-18
|
8-18
|
8-18
|
8-23
|
12-23
|
12-25
|
12-25
|
16-25
|
16-30
|
|
DN(mm)
尺寸（mm）
|
U45SM-25C、P、R U45H-25C、P、R
|
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
400
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
622
|
698
|
787
|
914
|
|
H
|
180
|
200
|
220
|
260
|
280
|
310
|
350
|
390
|
430
|
470
|
550
|
650
|
750
|
860
|
990
|
1110
|
|
W
|
100
|
100
|
120
|
140
|
160
|
180
|
200
|
240
|
280
|
310
|
340
|
400
|
520
|
640
|
760
|
900
|
|
D
|
95
|
105
|
115
|
135
|
145
|
160
|
180
|
195
|
230
|
270
|
300
|
360
|
425
|
485
|
550
|
610
|
|
K
|
65
|
75
|
85
|
100
|
110
|
125
|
145
|
160
|
190
|
220
|
250
|
310
|
370
|
430
|
490
|
550
|
|
T
|
14
|
14
|
14
|
15
|
15
|
17
|
19
|
19
|
21
|
25
|
27
|
31
|
33
|
36
|
40
|
44
|
|
n-φ
|
4-14
|
4-14
|
4-14
|
4-18
|
4-18
|
4-18
|
4-18
|
8-18
|
8-23
|
8-25
|
8-25
|
12-25
|
12-30
|
16-30
|
16-34
|
16-34
|
