用途
先导式安全阀是一种新颖结构的安全阀。主要用于石油天然气、化工、电力、冶金和城市燃气等领域，是受压设备、容器或管路上的最佳超压保护装置。其主要优点是变弹簧直接作用为导阀间接作用，提高了动作的灵敏度，而且主阀采用套筒活塞式，双重密封阀座结构，动作精度高、重复性好、回座快、不泄漏、能带高背压排放、工作寿命长、工作稳定可靠，它还可在线调校，反复启跳排放后，仍然能自动回座，关闭严密，操作维护方便。
|
主要连接尺寸 |
|||||||||||||||||||
|
Type
|
(DN)
|
do
|
L
|
L1
|
L2
|
H
|
DN'
|
D
|
D1
|
D2
|
D6
|
b
|
Z- d
|
D'
|
D1'
|
D2'
|
D6'
|
b'
|
Z'- d'
|
|
(K)Ax46 F -16
Y AF46Y-16 |
25
|
15
|
110
|
95
|
150
|
365
|
32
|
115
|
85
|
65
|
16
|
4-14
|
140
|
100
|
78
|
18
|
4-18
|
||
|
32
|
20
|
115
|
100
|
150
|
375
|
40
|
140
|
100
|
78
|
18
|
4-18
|
150
|
110
|
85
|
18
|
4-18
|
|||
|
40
|
25
|
120
|
110
|
160
|
390
|
50
|
150
|
110
|
85
|
18
|
4-18
|
165
|
125
|
100
|
20
|
4-18
|
|||
|
50
|
32
|
135
|
120
|
160
|
410
|
65
|
165
|
125
|
100
|
20
|
4-18
|
185
|
145
|
120
|
20
|
4-18
|
|||
|
65
|
40
|
160
|
140
|
175
|
435
|
80
|
185
|
145
|
120
|
20
|
4-18
|
200
|
160
|
135
|
20
|
8-18
|
|||
|
80
|
50
|
170
|
135
|
175
|
451
|
100
|
200
|
160
|
135
|
20
|
8-18
|
220
|
180
|
155
|
22
|
8-18
|
|||
|
100
|
65
|
195
|
175
|
195
|
500
|
125
|
220
|
180
|
155
|
22
|
8-18
|
250
|
210
|
185
|
24
|
8-18
|
|||
|
125
|
80
|
210
|
190
|
220
|
526
|
150
|
250
|
210
|
185
|
22
|
8-18
|
285
|
240
|
210
|
24
|
8-23
|
|||
|
150
|
100
|
255
|
230
|
265
|
623
|
175
|
285
|
240
|
210
|
24
|
8-23
|
315
|
270
|
240
|
26
|
8-23
|
|||
|
200
|
125
|
300
|
260
|
300
|
690
|
250
|
340
|
295
|
265
|
26
|
12-23
|
405
|
355
|
320
|
30
|
12-26
|
|||
|
(K)Ax46 F -25
Y AF46Y-25 |
25
|
15
|
110
|
95
|
150
|
365
|
32
|
115
|
85
|
65
|
16
|
4-14
|
140
|
100
|
78
|
18
|
4-18
|
||
|
32
|
20
|
115
|
100
|
150
|
375
|
40
|
140
|
100
|
78
|
18
|
4-18
|
150
|
110
|
85
|
18
|
4-18
|
|||
|
40
|
25
|
120
|
110
|
160
|
390
|
50
|
150
|
110
|
85
|
18
|
4-18
|
165
|
125
|
100
|
20
|
4-18
|
|||
|
50
|
32
|
135
|
120
|
160
|
410
|
65
|
165
|
125
|
100
|
20
|
4-18
|
185
|
145
|
120
|
20
|
4-18
|
|||
|
65
|
40
|
160
|
140
|
175
|
435
|
80
|
185
|
145
|
120
|
22
|
8-18
|
200
|
160
|
135
|
20
|
8-18
|
|||
|
80
|
50
|
170
|
135
|
175
|
451
|
100
|
200
|
160
|
135
|
22
|
8-18
|
220
|
180
|
155
|
22
|
8-18
|
|||
|
100
|
65
|
195
|
175
|
195
|
500
|
125
|
230
|
190
|
160
|
24
|
8-23
|
250
|
210
|
185
|
22
|
8-18
|
|||
|
125
|
80
|
210
|
190
|
220
|
526
|
150
|
270
|
220
|
188
|
28
|
8-26
|
285
|
240
|
210
|
24
|
8-23
|
|||
|
150
|
100
|
255
|
230
|
265
|
623
|
175
|
300
|
250
|
218
|
30
|
8-26
|
310
|
270
|
240
|
26
|
8-23
|
|||
|
200
|
125
|
300
|
260
|
300
|
690
|
250
|
360
|
310
|
278
|
34
|
12-26
|
405
|
355
|
320
|
30
|
12-26
|
|||
|
(K)Ax46 F -40
Y AF46Y-40 |
25
|
15
|
110
|
95
|
150
|
365
|
32
|
115
|
85
|
65
|
58
|
16
|
4-14
|
140
|
100
|
78
|
18
|
4-18
|
|
|
32
|
20
|
115
|
100
|
150
|
375
|
40
|
140
|
100
|
78
|
66
|
18
|
4-18
|
150
|
110
|
85
|
18
|
4-18
|
||
|
40
|
25
|
120
|
110
|
160
|
390
|
50
|
150
|
110
|
85
|
76
|
18
|
4-18
|
165
|
125
|
100
|
20
|
4-18
|
||
|
50
|
32
|
135
|
120
|
160
|
410
|
65
|
165
|
125
|
100
|
88
|
20
|
4-18
|
185
|
145
|
120
|
20
|
4-18
|
||
|
65
|
40
|
160
|
140
|
175
|
435
|
80
|
185
|
145
|
120
|
110
|
22
|
8-18
|
200
|
160
|
135
|
20
|
8-18
|
||
|
80
|
50
|
170
|
135
|
175
|
451
|
100
|
200
|
160
|
135
|
121
|
22
|
8-18
|
220
|
180
|
155
|
22
|
8-18
|
||
|
100
|
65
|
195
|
175
|
195
|
500
|
125
|
235
|
190
|
160
|
150
|
24
|
8-23
|
250
|
210
|
185
|
22
|
8-18
|
||
|
125
|
80
|
210
|
190
|
220
|
526
|
150
|
270
|
220
|
188
|
176
|
28
|
8-26
|
285
|
240
|
210
|
24
|
8-23
|
||
|
150
|
100
|
255
|
230
|
265
|
623
|
175
|
300
|
250
|
218
|
204
|
30
|
8-26
|
310
|
270
|
240
|
26
|
8-23
|
||
|
200
|
125
|
300
|
260
|
300
|
690
|
250
|
375
|
320
|
282
|
260
|
38
|
12-30
|
405
|
355
|
320
|
30
|
12-26
|
||
900
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