襯膠止回閥概述：
止回閥是一種依靠介質(zhì)本身的流動而自動啟閉閥瓣用來阻止介質(zhì)逆向流動的自動閥門。
南氟的襯里止回閥基本類型有四種：H41型法蘭連接直通升降式止回閥和H42型升降立式止回閥、H44立式止回閥、H76旋啟式止回閥。
襯膠止回閥設(shè)計規(guī)范
遵循GB/T 12235，GB/T 12236，API 6D標(biāo)準(zhǔn)
襯膠止回閥主要零部件材料表：
|
序號
|
零件名稱
|
灰鑄鐵
|
鑄鋼
|
不銹耐酸鑄鋼
|
超低碳不銹耐酸鑄鋼
|
|
Z
|
C
|
P
|
R
|
PL
|
RL
|
|
1
|
閥體/閥蓋
|
HT250
|
WCB
|
CF8
|
CF8M
|
CF3
|
CF3M
|
|
2
|
閥瓣/閥桿
|
35
|
1Cr13
|
1Cr18Ni9
|
1Cr18Ni12Mo2Ti
|
00Cr18Ni10
|
00Cr17Ni14Mo2
|
|
3
|
襯里/閥座
|
PCTEF(F3),FEP(F46),PFA(可溶F4),PP,PO
|
|
4
|
緊固螺栓
|
WCB
|
1Cr17Ni2
|
1Cr18Ni9Ti
|
|
5
|
螺母
|
PTFE(F4)
|
CF8
|
CF8
|
|
公稱通經(jīng)
|
L
|
D
|
D1
|
D2
|
f
|
b
|
Z-φd
|
D
|
D1
|
D2
|
f
|
b
|
Z-φd
|
|
DN(mm)
|
NPS(inch)
|
PN1.0MPa
|
PN1.6MPa
|
|
15
|
1/2
|
130
|
95
|
65
|
45
|
2
|
14
|
4-φ14
|
130
|
95
|
65
|
2
|
14
|
4-φ14
|
|
20
|
3/4
|
150
|
105
|
75
|
55
|
2
|
16
|
4-φ14
|
150
|
105
|
75
|
2
|
16
|
4-φ14
|
|
25
|
1
|
160
|
115
|
85
|
65
|
2
|
16
|
4-φ14
|
160
|
115
|
85
|
2
|
16
|
4-φ14
|
|
32
|
5/4
|
180
|
135
|
100
|
78
|
2
|
18
|
4-φ18
|
180
|
135
|
100
|
2
|
18
|
4-φ18
|
|
40
|
3/2
|
200
|
145
|
110
|
85
|
3
|
18
|
4-φ18
|
200
|
145
|
110
|
3
|
18
|
4-φ18
|
|
50
|
2
|
230
|
160
|
125
|
100
|
3
|
20
|
4-φ18
|
230
|
160
|
125
|
3
|
20
|
4-φ18
|
|
65
|
5/2
|
290
|
180
|
145
|
120
|
3
|
20
|
4-φ18
|
290
|
180
|
145
|
3
|
20
|
4-φ18
|
|
80
|
3
|
310
|
195
|
160
|
135
|
3
|
22
|
4-φ18
|
310
|
195
|
160
|
3
|
22
|
4-φ18
|
|
100
|
4
|
350
|
215
|
180
|
155
|
3
|
22
|
8-φ18
|
350
|
215
|
180
|
3
|
24
|
8-φ18
|
|
125
|
5
|
400
|
245
|
210
|
185
|
3
|
24
|
8-φ18
|
400
|
245
|
210
|
3
|
26
|
8-φ18
|
|
150
|
6
|
480
|
280
|
240
|
210
|
3
|
24
|
8-φ23
|
480
|
280
|
240
|
3
|
28
|
8-φ23
|
|
200
|
8
|
600
|
335
|
295
|
265
|
3
|
26
|
8-φ23
|
495
|
335
|
295
|
3
|
30
|
12-φ23
|
|
250
|
10
|
622
|
390
|
350
|
320
|
3
|
28
|
12-φ23
|
622
|
405
|
355
|
3
|
32
|
12-φ25
|
|
300
|
12
|
698
|
440
|
400
|
368
|
4
|
28
|
12-φ23
|
698
|
460
|
410
|
4
|
34
|
12-φ25
|
|
350
|
14
|
787
|
500
|
460
|
428
|
4
|
30
|
16-φ23
|
787
|
520
|
470
|
4
|
38
|
16-φ25
|
|
400
|
16
|
914
|
565
|
515
|
482
|
4
|
32
|
16-φ25
|
914
|
580
|
525
|
4
|
40
|
16-φ30
|
|
450
|
18
|
978
|
615
|
565
|
532
|
4
|
32
|
20-φ25
|
|
|
|
|
|
|
|
500
|
20
|
978
|
670
|
620
|
585
|
4
|
34
|
20-φ25
|
|
|
|
|
|