安全閥是依靠彈簧的力量將閥芯壓緊在閥座上，使安全閥處于關(guān)閉狀態(tài)，閥芯的下面受蒸汽向上頂起的力。正常運(yùn)行時(shí)，彈簧向下的壓緊力大于蒸汽向上的推力，閥門(mén)處于關(guān)閉狀態(tài)。當(dāng)蒸汽壓力達(dá)到安全閥起座壓力時(shí)，蒸汽對(duì)閥芯的作用力大于彈簧的作用力，使閥芯頂起，安全閥排汽。通過(guò)閥桿上部的調(diào)節(jié)螺絲改變彈簧的松緊程度，就可調(diào)整安全閥的起座壓力。這種安全閥具有調(diào)節(jié)方便、體積和重量都較小、排汽能力大等優(yōu)點(diǎn)，適用于不同參數(shù)和不同容量的鍋爐。
安全閥是鍋爐、壓力容器和其他受壓力設(shè)備上重要的安全附件。其動(dòng)作可靠性和性能好壞直接關(guān)系到設(shè)備和人身的安全，并與節(jié)能和環(huán)境保護(hù)緊密相關(guān)。
全啟封閉式安全閥的作用：全啟封閉式安全閥適用于工作溫度≤300℃的空氣、石油氣等介質(zhì)的設(shè)備和管路上; A42Y-16P～40P型適用于工作溫度≤200℃有腐蝕性的氣體介質(zhì)的設(shè)備和管路上;作為超壓保妒裝置,當(dāng)設(shè)備和管路內(nèi)壓力超過(guò)允許值時(shí),閥門(mén)自動(dòng)開(kāi)啟,繼而全量排放:當(dāng)壓力降低到規(guī)定值時(shí),閥門(mén)自動(dòng)關(guān)閉,保證設(shè)備和管路的安全運(yùn)行。
|
A42Y-16C
|
A42Y-16P
|
A42Y-16R
|
|
KA42Y-16
|
DA42Y-16C/P
|
A42Y-25
|
|
A42Y-25P
|
A42Y-25R
|
KA42Y-25（P）
|
|
DA42Y-25P
|
A42Y-40
|
A42Y-40P
|
|
A42Y-40R
|
KA42Y-40
|
DA42Y-40P
|
|
A42Y-64
|
A42Y-64P
|
A42Y-64R
|
|
KA42Y-64
|
DA42Y-64P
|
A42Y-100
|
|
A42Y-100
|
PA42Y-100R
|
KA42Y-100
|
|
DA42Y-100P
|
|
|
主要零件材料
|
NO.
|
零件名稱(chēng)
|
A42Y-C/KA42Y-C材料
|
A42Y-P/KA42Y-P材料
|
A42Y-R材料
|
DA42Y-P材料
|
|
1
|
閥座
|
2Cr13/1Cr18Ni9Ti
|
ZG1Cr18Ni9Ti
|
ZG1Cr18Ni12Mo2Ti
|
ZG1Cr18Ni9Ti
|
|
2
|
閥體
|
WCB
|
ZG1Cr18Ni9Ti
|
ZG1Cr18Ni12Mo2Ti
|
LCB/ZG1Cr18Ni9Ti
|
|
3
|
調(diào)節(jié)圈
|
2Cr13/1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti
|
|
4
|
反沖盤(pán)
|
2Cr13/1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti
|
|
5
|
閥瓣
|
2Cr13/1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti
|
|
6
|
導(dǎo)向套
|
2Cr13/1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti
|
|
7
|
閥蓋
|
ZG230-450
|
ZG230-450
|
ZG230-450
|
ZG1Cr18Ni9Ti
|
|
8
|
彈簧
|
50CrVA
|
50CrVA包覆氟塑料
|
50CrVA包覆氟塑料
|
50CrVA
|
|
9
|
閥桿
|
2Cr13
|
1Cr18Ni9Ti/1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti/1Cr18Ni12Mo2Ti
|
1Cr18Ni9Ti
|
|
10
|
調(diào)整螺桿
|
45
|
2Cr13
|
2Cr13
|
2Cr13
|
|
11
|
閥帽
|
ZG200-400
|
ZG200-400
|
ZG200-400
|
ZG230-450
|
|
密封面材料
|
堆焊Co基硬質(zhì)合金
|
主要外形尺寸
|
型號(hào)
|
公稱(chēng)通徑
|
do
|
D
|
K
|
g
|
g1
|
b
|
f
|
f1
|
Z-?d
|
DN'
|
D1
|
K1
|
g3
|
g2
|
b1
|
f'
|
f1'
|
Z1-?d1
|
L
|
L1
|
≈H
|
|
A42Y-16C
A42Y-16P
A42Y-16R
KA42Y-16C
DA42Y-16C（P）
|
20
|
15
|
105
|
75
|
|
55
|
16
|
2
|
|
4-14
|
25
|
115
|
85
|
|
65
|
16
|
2
|
|
4-14
|
110
|
95
|
378
|
|
25
|
16
|
115
|
85
|
|
65
|
16
|
2
|
|
4-14
|
32
|
140
|
100
|
|
78
|
18
|
2
|
|
4-18
|
110
|
95
|
378
|
|
32
|
20
|
140
|
100
|
|
78
|
18
|
2
|
|
4-18
|
40
|
150
|
110
|
|
85
|
18
|
3
|
|
4-18
|
115
|
100
|
378
|
|
40
|
25
|
150
|
110
|
|
85
|
18
|
3
|
|
4-18
|
50
|
165
|
125
|
|
100
|
20
|
3
|
|
4-18
|
120
|
110
|
406
|
|
50
|
32
|
165
|
125
|
|
100
|
20
|
3
|
|
4-18
|
65
|
185
|
145
|
|
120
|
20
|
3
|
|
4-18
|
135
|
120
|
450
|
|
65
|
40
|
185
|
145
|
|
120
|
20
|
3
|
|
4-18
|
80
|
200
|
160
|
|
135
|
20
|
3
|
|
8-18
|
160
|
140
|
520
|
|
80
|
50
|
200
|
160
|
|
135
|
20
|
3
|
|
8-18
|
100
|
220
|
180
|
|
155
|
22
|
3
|
|
8-18
|
170
|
135
|
525
|
|
100
|
65
|
220
|
180
|
|
155
|
22
|
3
|
|
8-18
|
125
|
250
|
210
|
|
185
|
22
|
3
|
|
8-18
|
195
|
175
|
690
|
|
125
|
80
|
250
|
210
|
|
185
|
22
|
3
|
|
8-18
|
150
|
285
|
240
|
|
210
|
24
|
3
|
|
8-23
|
210
|
190
|
780
|
|
150
|
100
|
285
|
240
|
|
210
|
24
|
3
|
|
8-23
|
175
|
310
|
270
|
|
240
|
26
|
3
|
|
8-23
|
255
|
230
|
838
|
|
200
|
125
|
340
|
295
|
|
265
|
26
|
3
|
|
12-23
|
250
|
405
|
355
|
|
320
|
30
|
3
|
|
12-26
|
300
|
260
|
992
|
|
250
|
150
|
405
|
355
|
|
320
|
30
|
3
|
|
12-26
|
300
|
460
|
410
|
|
375
|
30
|
4
|
|
12-26
|
350
|
320
|
1266
|
|
300
|
220
|
460
|
410
|
|
375
|
30
|
4
|
|
12-26
|
400
|
580
|
525
|
|
485
|
36
|
4
|
|
16-30
|
370
|
350
|
1283
|
|
350
|
250
|
520
|
470
|
|
435
|
34
|
4
|
|
16-26
|
500
|
715
|
650
|
|
608
|
44
|
4
|
|
20-34
|
500
|
450
|
1520
|
|
400
|
280
|
580
|
525
|
|
485
|
36
|
4
|
|
16-30
|
500
|
715
|
650
|
|
608
|
44
|
4
|
|
20-34
|
500
|
450
|
1530
|
|
A42Y-25C
A42Y-25P
A42Y-25R
KA42Y-25C
DA42Y-25（P）
|
20
|
15
|
105
|
75
|
|
55
|
16
|
2
|
|
4-14
|
25
|
115
|
85
|
|
65
|
16
|
2
|
|
4-14
|
110
|
95
|
378
|
|
25
|
16
|
115
|
85
|
|
65
|
16
|
2
|
|
4-14
|
32
|
140
|
100
|
|
78
|
18
|
2
|
|
4-18
|
110
|
95
|
378
|
|
32
|
20
|
140
|
100
|
|
78
|
18
|
2
|
|
4-18
|
40
|
150
|
110
|
|
85
|
18
|
3
|
|
4-18
|
115
|
100
|
378
|
|
40
|
25
|
150
|
110
|
|
85
|
18
|
3
|
|
4-18
|
50
|
165
|
125
|
|
100
|
20
|
3
|
|
4-18
|
120
|
110
|
406
|
|
50
|
32
|
165
|
125
|
|
100
|
20
|
3
|
|
4-18
|
65
|
185
|
145
|
|
120
|
20
|
3
|
|
4-18
|
135
|
120
|
450
|
|
65
|
40
|
185
|
145
|
|
120
|
22
|
3
|
|
8-18
|
80
|
200
|
160
|
|
135
|
20
|
3
|
|
8-18
|
160
|
140
|
520
|
|
80
|
50
|
200
|
160
|
|
135
|
22
|
3
|
|
8-18
|
100
|
220
|
180
|
|
155
|
22
|
3
|
|
8-18
|
170
|
135
|
525
|
|
100
|
65
|
230
|
190
|
|
160
|
24
|
3
|
|
8-23
|
125
|
250
|
210
|
|
185
|
22
|
3
|
|
8-18
|
195
|
175
|
690
|
|
125
|
80
|
270
|
220
|
|
188
|
28
|
3
|
|
8-26
|
150
|
285
|
240
|
|
210
|
24
|
3
|
|
8-23
|
210
|
190
|
780
|
|
150
|
100
|
300
|
250
|
|
218
|
30
|
3
|
|
8-26
|
175
|
310
|
270
|
|
240
|
26
|
3
|
|
8-23
|
255
|
230
|
838
|
|
200
|
125
|
360
|
310
|
|
278
|
34
|
3
|
|
12-26
|
250
|
405
|
355
|
|
320
|
30
|
3
|
|
12-26
|
300
|
260
|
992
|
|
250
|
150
|
425
|
370
|
|
332
|
36
|
3
|
|
12-30
|
300
|
460
|
410
|
|
375
|
30
|
4
|
|
12-26
|
350
|
320
|
1266
|
|
300
|
220
|
485
|
430
|
|
390
|
40
|
4
|
|
16-30
|
400
|
580
|
525
|
|
485
|
36
|
4
|
|
16-30
|
370
|
350
|
1283
|
|
A42Y-40C
A42Y-40P
A42Y-40R
KA42Y-40C
DA42Y-40（P）
|
20
|
15
|
105
|
75
|
51
|
55
|
16
|
2
|
4
|
4-14
|
25
|
115
|
85
|
|
65
|
16
|
2
|
|
4-14
|
110
|
95
|
378
|
|
25
|
16
|
115
|
85
|
58
|
65
|
16
|
2
|
4
|
4-14
|
32
|
140
|
100
|
|
78
|
18
|
2
|
|
4-18
|
110
|
95
|
378
|
|
32
|
20
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
40
|
150
|
110
|
|
85
|
18
|
3
|
|
4-18
|
115
|
100
|
378
|
|
40
|
25
|
150
|
110
|
76
|
85
|
18
|
3
|
4
|
4-18
|
50
|
165
|
125
|
|
100
|
20
|
3
|
|
4-18
|
120
|
110
|
406
|
|
50
|
32
|
165
|
125
|
88
|
100
|
20
|
3
|
4
|
4-18
|
65
|
185
|
145
|
|
120
|
20
|
3
|
|
4-18
|
135
|
120
|
450
|
|
65
|
40
|
185
|
145
|
110
|
120
|
22
|
3
|
4
|
8-18
|
80
|
200
|
160
|
|
135
|
20
|
3
|
|
8-18
|
160
|
140
|
520
|
|
80
|
50
|
200
|
160
|
121
|
135
|
22
|
3
|
4
|
8-18
|
100
|
220
|
180
|
|
155
|
22
|
3
|
|
8-18
|
170
|
135
|
525
|
|
100
|
65
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
125
|
250
|
210
|
|
185
|
22
|
3
|
|
8-18
|
195
|
175
|
690
|
|
125
|
80
|
270
|
220
|
176
|
188
|
28
|
3
|
4.5
|
8-26
|
150
|
285
|
240
|
|
210
|
24
|
3
|
|
8-23
|
210
|
190
|
780
|
|
150
|
100
|
300
|
250
|
204
|
218
|
30
|
3
|
4.5
|
8-26
|
175
|
310
|
270
|
|
240
|
26
|
3
|
|
8-23
|
255
|
230
|
838
|
|
200
|
125
|
375
|
320
|
260
|
282
|
38
|
3
|
4.5
|
12-30
|
250
|
405
|
355
|
|
320
|
30
|
3
|
|
12-26
|
300
|
260
|
992
|
|
250
|
150
|
450
|
385
|
313
|
345
|
42
|
3
|
4.5
|
12-34
|
300
|
460
|
410
|
|
375
|
30
|
4
|
|
12-26
|
350
|
320
|
1266
|
|
A42Y-64
A42Y-64P
A42Y-64R
DA42Y-64（P）
|
20
|
10
|
125
|
90
|
51
|
68
|
22
|
2
|
4
|
4-18
|
25
|
115
|
85
|
58
|
65
|
16
|
2
|
4
|
4-14
|
96
|
85
|
264
|
|
25
|
16
|
140
|
100
|
58
|
78
|
22
|
2
|
4
|
4-18
|
32
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
110
|
100
|
277
|
|
32
|
20
|
155
|
110
|
66
|
82
|
24
|
2
|
4
|
4-23
|
40
|
150
|
110
|
76
|
85
|
18
|
3
|
4
|
4-18
|
130
|
110
|
289
|
|
40
|
25
|
170
|
125
|
76
|
95
|
24
|
3
|
4
|
4-23
|
50
|
165
|
125
|
88
|
100
|
20
|
3
|
4
|
4-18
|
130
|
120
|
319
|
|
50
|
32
|
180
|
135
|
88
|
105
|
26
|
3
|
4
|
4-23
|
65
|
185
|
145
|
110
|
120
|
222
|
3
|
4
|
8-18
|
135
|
130
|
389
|
|
65
|
40
|
205
|
160
|
110
|
130
|
28
|
3
|
4
|
8-23
|
80
|
200
|
160
|
121
|
135
|
22
|
3
|
48-18
|
175
|
160
|
493
|
|
|
80
|
50
|
215
|
170
|
121
|
140
|
30
|
3
|
4
|
8-23
|
100
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
175
|
160
|
483
|
|
100
|
65
|
250
|
200
|
150
|
168
|
32
|
3
|
4.5
|
8-26
|
125
|
270
|
220
|
176
|
188
|
28
|
3
|
4.5
|
8-25
|
195
|
195
|
613
|
|
150
|
100
|
345
|
280
|
204
|
240
|
38
|
3
|
4.5
|
8-34
|
200
|
375
|
320
|
260
|
282
|
38
|
3
|
4.5
|
12-30
|
280
|
265
|
894
|
|
A42Y-100
A42Y-100P
A42Y-100R
DA42Y-100（P）
|
20
|
10
|
125
|
90
|
51
|
68
|
22
|
2
|
4
|
4-18
|
25
|
115
|
85
|
58
|
65
|
16
|
2
|
4
|
4-14
|
96
|
85
|
264
|
|
25
|
16
|
140
|
100
|
58
|
78
|
24
|
2
|
4
|
4-18
|
32
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
110
|
100
|
277
|
|
32
|
20
|
155
|
110
|
66
|
82
|
24
|
2
|
4
|
4-23
|
40
|
150
|
110
|
76
|
85
|
18
|
3
|
4
|
4-18
|
130
|
110
|
289
|
|
40
|
25
|
170
|
125
|
76
|
95
|
26
|
3
|
4
|
4-23
|
50
|
165
|
125
|
8
|
100
|
20
|
3
|
4
|
4-18
|
130
|
120
|
319
|
|
50
|
32
|
195
|
145
|
88
|
112
|
28
|
3
|
4
|
4-26
|
65
|
185
|
145
|
110
|
120
|
22
|
3
|
4
|
8-18
|
135
|
130
|
389
|
|
65
|
32
|
220
|
170
|
110
|
138
|
32
|
3
|
4
|
8-26
|
80
|
200
|
160
|
121
|
135
|
22
|
3
|
4
|
8-18
|
175
|
160
|
493
|
|
80
|
40
|
230
|
180
|
121
|
148
|
34
|
3
|
4
|
8-26
|
100
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
175
|
160
|
483
|
|
100
|
50
|
265
|
210
|
150
|
172
|
38
|
3
|
4.5
|
8-30
|
125
|
270
|
220
|
176
|
188
|
28
|
3
|
4.5
|
8-25
|
195
|
195
|
613
|
|
150
|
80
|
355
|
290
|
204
|
250
|
46
|
3
|
4.5
|
12-34
|
200
|
375
|
320
|
260
|
282
|
38
|
3
|
4.5
|
12-30
|
280
|
265
|
|
在線(xiàn)咨詢(xún) 
在線(xiàn)客服：0571-87774297
