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公司基本資料信息
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J41H/Y-16C~160鑄鋼截止閥的啟閉件是塞形的閥瓣,密封面呈平面或錐面,閥瓣沿流體的中心線作直線運(yùn)動(dòng)。閥桿的運(yùn)動(dòng)形式,有升降桿式(閥桿升降,手輪不升降),也有升降旋轉(zhuǎn)桿式(手輪與閥桿一起旋轉(zhuǎn)升降,螺母設(shè)在閥體上)。截止閥只適用于全開和全關(guān),不允許作調(diào)節(jié)和節(jié)流。
截止閥屬于強(qiáng)制密封式閥門,所以在閥門關(guān)閉時(shí),必須向閥瓣施加壓力,以強(qiáng)制密封面不泄漏。當(dāng)介質(zhì)由閥瓣下方進(jìn)入閥門時(shí),操作力所需要克服的阻力,是閥桿和填料的摩擦力與由介質(zhì)的壓力所產(chǎn)生的推力,關(guān)閥門的力比開閥門的力大,所以閥桿的直徑要大,否則會(huì)發(fā)生閥桿頂彎的故障。近年來(lái),從自密封的閥門出現(xiàn)后,截止閥的介質(zhì)流向就改由閥瓣上方進(jìn)入閥腔,這時(shí)在介質(zhì)壓力作用下,關(guān)閥門的力小,而開閥門的力大,閥桿的直徑可以相應(yīng)地減少。同時(shí),在介質(zhì)作用下,這種形式的閥門也較嚴(yán)密。我國(guó)閥門“三化給”曾規(guī)定,截止閥的流向,一律采用自上而下。
截止閥開啟時(shí),閥瓣的開啟高度,為公稱直徑的25%~30%時(shí),流量已達(dá)到最大,表示閥門已達(dá)全開位置。所以截止閥的全開位置,應(yīng)由閥瓣的行程來(lái)決定。
鑄鋼截止閥主要尺寸
2.5MPa |
DN |
L |
D |
D1 |
D2 |
B |
n-φd |
H |
D0 |
凸面法蘭 |
10 |
130 |
90 |
60 |
40 |
16 |
4-φ14 |
198 |
120 |
15 |
130 |
95 |
65 |
45 |
16 |
4-φ14 |
218 |
120 |
|
20 |
150 |
105 |
75 |
55 |
16 |
4-φ14 |
258 |
140 |
|
25 |
160 |
115 |
85 |
65 |
16 |
4-φ14 |
275 |
140 |
|
32 |
180 |
135 |
100 |
78 |
18 |
4-φ18 |
280 |
160 |
|
40 |
200 |
145 |
110 |
85 |
18 |
4-φ18 |
330 |
180 |
|
50 |
230 |
160 |
125 |
100 |
20 |
4-φ18 |
350 |
200 |
|
65 |
290 |
180 |
145 |
120 |
22 |
8-φ18 |
400 |
280 |
|
80 |
310 |
195 |
160 |
135 |
22 |
8-φ18 |
355 |
280 |
|
100 |
350 |
230 |
190 |
160 |
24 |
8-φ23 |
415 |
320 |
|
125 |
400 |
270 |
220 |
188 |
28 |
8-φ25 |
460 |
360 |
|
150 |
480 |
300 |
250 |
218 |
30 |
8-φ25 |
510 |
450 |
|
200 |
600 |
360 |
3lO |
278 |
34 |
12-φ25 |
710 |
500 |
|
250 |
650 |
425 |
370 |
332 |
36 |
12-φ30 |
786 |
550 |
|
300 |
750 |
485 |
430 |
390 |
40 |
16-φ30 |
925 |
600 |
|
350 |
850 |
550 |
490 |
448 |
44 |
16-φ34 |
1075 |
700 |
|
400 |
950 |
610 |
550 |
505 |
48 |
16-φ34 |
1235 |
800 |
|
450 |
1200 |
660 |
600 |
555 |
50 |
20-φ34 |
- |
1000 |
|
500 |
1250 |
730 |
660 |
61O |
52 |
20-φ41 |
- |
1000 |
4.OMPa
|
DN
|
L
|
D
|
Dl
|
D2
|
D6
|
b
|
n-φd
|
H
|
DO
|
凹凸法蘭
MFM J41H J41Y J41W J41F J41N 40 40P 40R 40I |
10
|
130
|
90
|
60
|
41
|
35
|
14
|
4-φ14
|
198
|
120
|
15
|
130
|
95
|
65
|
45
|
40
|
16
|
4-φ14
|
233
|
120
|
|
20
|
150
|
105
|
75
|
55
|
51
|
16
|
4-φ14
|
275
|
140
|
|
25
|
160
|
115
|
85
|
65
|
58
|
16
|
4-φ14
|
285
|
160
|
|
32
|
180
|
135
|
100
|
78
|
66
|
18
|
4-φ18
|
302
|
160
|
|
40
|
200
|
145
|
110
|
85
|
76
|
18
|
4-φ18
|
355
|
200
|
|
50
|
230
|
160
|
125
|
100
|
88
|
20
|
4-φ18
|
373
|
200
|
|
65
|
290
|
180
|
145
|
120
|
110
|
22
|
8-φ18
|
408
|
280
|
|
80
|
310
|
195
|
160
|
135
|
121
|
22
|
8-φ18
|
436
|
280
|
|
100
|
350
|
230
|
190
|
160
|
150
|
24
|
8-φ23
|
480
|
320
|
|
125
|
400
|
270
|
220
|
188
|
176
|
28
|
8-φ25
|
588
|
360
|
|
150
|
480
|
300
|
250
|
218
|
204
|
30
|
8-φ25
|
611
|
400
|
|
200
|
600
|
375
|
320
|
282
|
260
|
38
|
12-φ30
|
720
|
400
|
|
6.4MPa
|
15
|
170
|
105
|
75
|
55
|
40
|
18
|
4-φ14
|
195
|
400
|
凹凸法蘭
MFM J41H J41Y J41W J41F J41N 64 64P 64R 64I |
20
|
190
|
125
|
90
|
68
|
51
|
20
|
4-φ18
|
228
|
160
|
25
|
210
|
135
|
100
|
78
|
58
|
22
|
4-φ18
|
275
|
180
|
|
32
|
230
|
150
|
110
|
82
|
66
|
24
|
4-φ23
|
325
|
200
|
|
40
|
260
|
165
|
125
|
95
|
76
|
24
|
4-φ23
|
360
|
240
|
|
50
|
300
|
175
|
135
|
105
|
88
|
26
|
4-φ23
|
4lO
|
280
|
|
65
|
340
|
200
|
160
|
130
|
110
|
28
|
8-φ23
|
450
|
320
|
|
80
|
380
|
210
|
170
|
140
|
121
|
30
|
8-φ23
|
485
|
360
|
|
100
|
430
|
250
|
200
|
168
|
150
|
32
|
8-φ25
|
537
|
400
|
|
125
|
500
|
295
|
240
|
202
|
176
|
36
|
8-φ30
|
631
|
400
|
|
150
|
550
|
340
|
280
|
240
|
204
|
38
|
8-φ34
|
646
|
450
|
|
200
|
650
|
405
|
345
|
300
|
260
|
44
|
12-φ34
|
813
|
500
|
|
10.0MPa
|
10
|
170
|
100
|
70
|
50
|
35
|
20
|
4-φ14
|
198
|
140
|
凹凸法蘭
MFM J41H J41Y J41W 100 100P 100R 100I |
15
|
170
|
105
|
75
|
55
|
40
|
20
|
4-φ14
|
202
|
140
|
20
|
190
|
125
|
90
|
68
|
51
|
22
|
4-φ18
|
228
|
160
|
|
25
|
210
|
135
|
100
|
78
|
58
|
24
|
4-φ18
|
250
|
180
|
|
32
|
230
|
150
|
110
|
82
|
66
|
24
|
4-φ23
|
326
|
200
|
|
40
|
260
|
165
|
125
|
95
|
76
|
26
|
4-φ23
|
360
|
240
|
|
50
|
300
|
195
|
145
|
112
|
88
|
28
|
4-φ25
|
414
|
280
|
|
65
|
340
|
220
|
170
|
138
|
110
|
32
|
8-φ25
|
434
|
320
|
|
80
|
380
|
230
|
180
|
148
|
121
|
34
|
8-φ25
|
547
|
360
|
|
100
|
430
|
265
|
2lO
|
172
|
150
|
38
|
8-φ30
|
621
|
400
|
|
125
|
500
|
310
|
250
|
210
|
176
|
42
|
8-φ34
|
732
|
400
|
|
150
|
550
|
350
|
290
|
250
|
204
|
46
|
12-φ34
|
840
|
450
|
|
200
|
650
|
430
|
360
|
312
|
260
|
54
|
12-φ41
|
925
|
500
|
|
16.0MPa
|
15
|
170
|
110
|
75
|
52
|
40
|
24
|
4-φ18
|
148
|
140
|
凹凸法蘭
MFM J41H J41Y J41W 160 160P 160R 160I |
20
|
190
|
130
|
90
|
62
|
51
|
26
|
4-φ23
|
158
|
160
|
25
|
210
|
140
|
100
|
72
|
58
|
28
|
4-φ23
|
175
|
180
|
|
32
|
230
|
165
|
115
|
85
|
66
|
30
|
4-φ25
|
200
|
200
|
|
40
|
260
|
175
|
125
|
92
|
76
|
32
|
4-φ27
|
231
|
240
|
|
50
|
300
|
215
|
165
|
132
|
88
|
36
|
8-φ25
|
262
|
280
|
|
65
|
340
|
245
|
190
|
152
|
110
|
44
|
8-φ30
|
303
|
320
|
|
80
|
380
|
260
|
205
|
168
|
121
|
46
|
8-φ30
|
341
|
360
|
|
100
|
430
|
300
|
240
|
200
|
150
|
48
|
8-φ34
|
485
|
400
|