A44Y適用于工作溫度≤300℃的空氣、石油等介質的設備或管路上，作為超壓保護裝置。連接法蘭標準PN＜6.4MPa按JB/T-94系列1。PN≥6.4MPa按JB/T-94系列2標準。
一、結構簡述：
1、帶扳手彈簧全啟式**閥具有結構簡單、密封性能好、開啟壓力準確、排放能力大、回座壓差小、調整方便等特點。
2、噴嘴型閥座：閥座為位伐爾噴嘴型閥座，蒸汽流經閥座出口處時達到音速，排放系數大，閥座密封面堆焊鈷鉻鎢硬質合金，耐磨抗沖蝕，壽命長。
3、熱彈性閥瓣：閥瓣設計為熱彈性結構，利用其在介質壓力下微小的變形，提高密封能力，克服**閥在介質壓力下臨近整定壓力時的前泄現象。閥瓣密封面采用先進的激光淬火技術，提高了硬度、耐磨性、抗沖抗性。
4、調節螺母：通過調整調節螺母，調整彈簧壓縮量，使閥門能夠很方便、很迅速地獲得準確的整定壓力。
5、背壓調整套：調整閥瓣背壓的輔助機構，通過背壓調整套調整，可獲得合適的回座壓差。上調時，使閥門背壓降低。下調時，使閥門背壓提高。
二、安裝說明：
1、**閥必須垂直安裝，并*好直接安裝在容器或管道的接頭上。接頭內徑應不小于**閥的進口通徑。
2、**閥的出口必須裝設適當的膨脹節，以防止排放管的熱膨脹給**閥帶來不應有的熱應力。排放管內徑應比閥門出口直徑大，長度盡可能短，避免拐彎。排放管及膨脹節重量不應作用在**閥上，應固定在建筑上。排放管的中心線與閥體的中心線間距離盡可能的短。對每臺**閥都應單獨裝設排放管。
3、消聲器的出口處要有足夠的面積，防止產生背壓影響閥門的排放能力。
三、主要零部件材料：
|
NO.
|
零件名稱
|
A48Y-C A44Y-C 材料
|
A44Y-P材料
|
A44Y-R材料
|
|
1
|
閥體
|
WCB
|
ZG1Cr18Ni9Ti
|
CF8M
|
|
2
|
閥座
|
2Cr13
|
1Cr18Ni9Ti
|
316
|
|
3
|
調節圈
|
ZG2Cr13
|
ZG1Cr18Ni9Ti
|
0Cr18Ni12Mo2Ti
|
|
4
|
反沖盤
|
ZG2Cr13
|
ZG1Cr18Ni9Ti
|
316
|
|
5
|
閥瓣
|
2Cr13
|
1Cr18Ni9Ti
|
316
|
|
6
|
導向套
|
2Cr13
|
1Cr18Ni9Ti
|
0Cr18Ni12Mo2Ti
|
|
7
|
閥蓋
|
ZG230-450
|
ZG230-450
|
ZG230-450
|
|
8
|
彈簧
|
50CrVA
|
50CrVA包覆氟塑料
|
50CrVA包覆氟塑料
|
|
9
|
閥桿
|
2Cr13
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
|
10
|
扳手
|
ZG200-400
|
ZG200-400
|
ZG200-400
|
|
11
|
調整螺桿
|
45
|
2Cr13
|
2Cr13
|
|
12
|
保護罩
|
ZG200-400
|
ZG200-400
|
316
|
|
|
密封面材料
|
堆焊Co基硬質合金
|
四、上明牌A44Y封閉帶板手全啟式**閥外形尺寸和連接尺寸:
|
型號
|
公稱
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
|
A48Y-16C
A44Y-16C
A44Y-16P
A44Y-16R
|
20
|
15
|
105
|
75
|
-
|
55
|
16
|
2
|
-
|
4-14
|
25
|
115
|
85
|
-
|
65
|
16
|
2
|
-
|
4-14
|
110
|
95
|
411
|
|
25
|
16
|
115
|
85
|
-
|
65
|
16
|
2
|
-
|
4-14
|
32
|
140
|
100
|
-
|
78
|
18
|
2
|
-
|
4-18
|
110
|
95
|
411
|
|
32
|
20
|
140
|
100
|
-
|
78
|
18
|
2
|
-
|
4-18
|
40
|
150
|
110
|
-
|
85
|
18
|
3
|
-
|
4-18
|
115
|
100
|
411
|
|
40
|
25
|
150
|
110
|
-
|
85
|
18
|
3
|
-
|
4-18
|
50
|
165
|
125
|
-
|
100
|
20
|
3
|
-
|
4-18
|
120
|
110
|
472
|
|
50
|
32
|
165
|
125
|
-
|
100
|
20
|
3
|
-
|
4-18
|
65
|
185
|
145
|
-
|
120
|
20
|
3
|
-
|
4-18
|
135
|
120
|
532
|
|
65
|
40
|
185
|
145
|
-
|
120
|
20
|
3
|
-
|
4-18
|
80
|
200
|
160
|
-
|
135
|
20
|
3
|
-
|
8-18
|
160
|
140
|
556
|
|
80
|
50
|
200
|
160
|
-
|
135
|
20
|
3
|
-
|
8-18
|
100
|
220
|
180
|
-
|
155
|
22
|
3
|
-
|
8-18
|
170
|
135
|
561
|
|
100
|
65
|
220
|
180
|
-
|
155
|
20
|
3
|
-
|
8-18
|
125
|
250
|
210
|
-
|
185
|
22
|
3
|
-
|
8-18
|
195
|
175
|
667
|
|
125
|
80
|
250
|
210
|
-
|
185
|
22
|
3
|
-
|
8-18
|
150
|
285
|
240
|
-
|
210
|
24
|
3
|
-
|
8-23
|
210
|
190
|
857
|
|
150
|
100
|
285
|
240
|
-
|
210
|
24
|
3
|
-
|
8-23
|
175
|
310
|
270
|
-
|
240
|
26
|
3
|
-
|
8-23
|
255
|
230
|
915
|
|
200
|
125
|
340
|
295
|
-
|
265
|
26
|
3
|
-
|
12-23
|
250
|
405
|
355
|
-
|
320
|
30
|
3
|
-
|
12-26
|
300
|
260
|
1073
|
|
250
|
150
|
405
|
355
|
-
|
320
|
30
|
3
|
-
|
12-26
|
300
|
460
|
410
|
-
|
375
|
30
|
4
|
-
|
12-26
|
350
|
320
|
1307
|
|
300
|
220
|
460
|
410
|
-
|
375
|
30
|
4
|
-
|
12-26
|
400
|
580
|
525
|
-
|
485
|
36
|
4
|
-
|
16-30
|
370
|
350
|
1233
|
|
350
|
250
|
520
|
470
|
-
|
435
|
34
|
4
|
-
|
16-26
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1711
|
|
400
|
280
|
580
|
525
|
-
|
485
|
36
|
4
|
-
|
16-30
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1780
|
A48Y-25
A44Y-25
A44Y-25P
A44Y-25R
|
20
|
15
|
105
|
75
|
-
|
55
|
16
|
2
|
-
|
4-14
|
25
|
115
|
85
|
-
|
65
|
16
|
2
|
-
|
4-14
|
110
|
95
|
411
|
|
25
|
16
|
115
|
85
|
-
|
65
|
16
|
2
|
-
|
4-14
|
32
|
140
|
100
|
-
|
78
|
18
|
2
|
-
|
4-18
|
110
|
95
|
411
|
|
32
|
20
|
140
|
100
|
-
|
78
|
18
|
2
|
-
|
4-18
|
40
|
150
|
110
|
-
|
85
|
18
|
3
|
-
|
4-18
|
115
|
100
|
411
|
|
40
|
25
|
150
|
110
|
-
|
85
|
18
|
3
|
-
|
4-18
|
50
|
165
|
125
|
-
|
100
|
20
|
3
|
-
|
4-18
|
120
|
110
|
472
|
|
50
|
32
|
165
|
125
|
-
|
100
|
20
|
3
|
-
|
4-18
|
65
|
185
|
145
|
-
|
120
|
20
|
3
|
-
|
4-18
|
135
|
120
|
532
|
|
65
|
40
|
185
|
145
|
-
|
120
|
22
|
3
|
-
|
8-18
|
80
|
200
|
160
|
-
|
135
|
20
|
3
|
-
|
8-18
|
160
|
140
|
556
|
|
80
|
50
|
200
|
160
|
-
|
135
|
22
|
3
|
-
|
8-18
|
100
|
220
|
180
|
-
|
155
|
22
|
3
|
-
|
8-18
|
170
|
135
|
561
|
|
100
|
65
|
230
|
190
|
-
|
160
|
24
|
3
|
-
|
8-23
|
125
|
250
|
210
|
-
|
185
|
22
|
3
|
-
|
8-18
|
195
|
175
|
667
|
|
125
|
80
|
270
|
220
|
-
|
188
|
28
|
3
|
-
|
8-26
|
150
|
285
|
240
|
-
|
210
|
24
|
3
|
-
|
8-23
|
210
|
190
|
857
|
|
150
|
100
|
300
|
250
|
-
|
218
|
30
|
3
|
-
|
8-26
|
175
|
310
|
270
|
-
|
240
|
26
|
3
|
-
|
8-23
|
255
|
230
|
915
|
|
200
|
125
|
360
|
310
|
-
|
278
|
34
|
3
|
-
|
12-26
|
250
|
405
|
355
|
-
|
320
|
30
|
3
|
-
|
12-26
|
300
|
260
|
1073
|
|
250
|
150
|
425
|
370
|
-
|
332
|
36
|
3
|
-
|
12-30
|
300
|
460
|
410
|
-
|
375
|
30
|
4
|
-
|
12-26
|
350
|
320
|
1307
|
|
300
|
220
|
485
|
430
|
-
|
390
|
40
|
4
|
-
|
16-30
|
400
|
580
|
525
|
-
|
485
|
36
|
4
|
-
|
16-30
|
370
|
350
|
1233
|
|
350
|
250
|
555
|
490
|
-
|
448
|
44
|
4
|
-
|
16-34
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1711
|
|
400
|
280
|
620
|
550
|
-
|
505
|
48
|
4
|
-
|
16-36
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1780
|
A48Y-40
A44Y-40
A44Y-40P
A44Y-40R
|
20
|
15
|
105
|
75
|
51
|
55
|
16
|
2
|
4
|
4-14
|
25
|
115
|
85
|
-
|
65
|
16
|
2
|
-
|
4-14
|
110
|
95
|
411
|
|
25
|
16
|
115
|
85
|
58
|
65
|
16
|
2
|
4
|
4-14
|
32
|
140
|
100
|
-
|
78
|
18
|
2
|
-
|
4-18
|
110
|
95
|
411
|
|
32
|
20
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
40
|
150
|
110
|
-
|
85
|
18
|
3
|
-
|
4-18
|
115
|
100
|
411
|
|
40
|
25
|
150
|
110
|
76
|
85
|
18
|
3
|
4
|
4-18
|
50
|
165
|
125
|
-
|
100
|
20
|
3
|
-
|
4-18
|
120
|
110
|
472
|
|
50
|
32
|
165
|
125
|
88
|
100
|
20
|
3
|
4
|
4-18
|
65
|
185
|
145
|
-
|
120
|
20
|
3
|
-
|
4-18
|
135
|
120
|
532
|
|
65
|
40
|
185
|
145
|
110
|
120
|
22
|
3
|
4
|
8-18
|
80
|
200
|
160
|
-
|
135
|
20
|
3
|
-
|
8-18
|
160
|
140
|
556
|
|
80
|
50
|
200
|
160
|
121
|
135
|
22
|
3
|
4
|
8-18
|
100
|
220
|
180
|
-
|
155
|
22
|
3
|
-
|
8-18
|
170
|
135
|
561
|
|
100
|
65
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
125
|
250
|
210
|
-
|
185
|
22
|
3
|
-
|
8-18
|
195
|
175
|
697
|
|
125
|
80
|
270
|
220
|
176
|
188
|
28
|
3
|
4.5
|
8-26
|
150
|
285
|
240
|
-
|
210
|
24
|
3
|
-
|
8-23
|
210
|
190
|
857
|
|
150
|
100
|
300
|
250
|
204
|
218
|
30
|
3
|
4.5
|
8-26
|
175
|
310
|
270
|
-
|
240
|
26
|
3
|
-
|
8-23
|
255
|
230
|
915
|
|
200
|
125
|
375
|
320
|
260
|
282
|
38
|
3
|
4.5
|
12-30
|
250
|
405
|
355
|
-
|
320
|
30
|
3
|
-
|
12-26
|
300
|
260
|
1073
|
|
250
|
150
|
450
|
385
|
313
|
345
|
42
|
3
|
4.5
|
12-34
|
300
|
460
|
410
|
-
|
375
|
30
|
4
|
-
|
12-26
|
350
|
320
|
1307
|
|
300
|
220
|
515
|
450
|
364
|
408
|
46
|
4
|
4.5
|
16-34
|
400
|
580
|
525
|
-
|
485
|
36
|
4
|
-
|
16-30
|
370
|
350
|
1233
|
|
350
|
250
|
580
|
510
|
422
|
465
|
52
|
4
|
5
|
16-36
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1711
|
|
400
|
280
|
660
|
585
|
474
|
535
|
58
|
4
|
5
|
16-41
|
500
|
715
|
650
|
-
|
608
|
44
|
4
|
-
|
20-34
|
500
|
450
|
1711
|
A48Y-64
A44Y-64
A44Y-64P
A44Y-64R
|
20
|
10
|
125
|
90
|
51
|
68
|
22
|
2
|
4
|
4-18
|
25
|
115
|
85
|
58
|
65
|
16
|
2
|
4
|
4-14
|
96
|
85
|
297
|
|
25
|
16
|
140
|
100
|
58
|
78
|
22
|
2
|
4
|
4-18
|
32
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
110
|
100
|
310
|
|
32
|
20
|
155
|
110
|
66
|
82
|
24
|
2
|
4
|
4-23
|
40
|
150
|
110
|
76
|
85
|
18
|
3
|
4
|
4-18
|
130
|
110
|
322
|
|
40
|
25
|
170
|
125
|
76
|
95
|
24
|
3
|
4
|
4-23
|
50
|
165
|
125
|
88
|
100
|
20
|
3
|
4
|
4-18
|
135
|
120
|
352
|
|
50
|
32
|
180
|
135
|
88
|
105
|
26
|
3
|
4
|
4-23
|
65
|
185
|
145
|
110
|
120
|
22
|
3
|
4
|
8-18
|
155
|
135
|
425
|
|
65
|
40
|
205
|
160
|
110
|
130
|
28
|
3
|
4
|
8-23
|
80
|
200
|
160
|
121
|
135
|
22
|
3
|
4
|
8-18
|
175
|
160
|
570
|
|
80
|
50
|
215
|
170
|
121
|
140
|
30
|
3
|
4
|
8-23
|
100
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
175
|
160
|
560
|
|
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
|
690
|
|
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
|
935
|
A48Y-100
A44Y-100
A44Y-100P
A44Y-100R
|
20
|
10
|
125
|
90
|
51
|
68
|
22
|
2
|
4
|
4-18
|
25
|
115
|
85
|
58
|
65
|
16
|
3
|
4
|
4-14
|
96
|
85
|
297
|
|
25
|
16
|
140
|
100
|
58
|
78
|
24
|
2
|
4
|
4-18
|
32
|
140
|
100
|
66
|
78
|
18
|
2
|
4
|
4-18
|
110
|
100
|
310
|
|
32
|
20
|
155
|
110
|
66
|
82
|
24
|
2
|
4
|
4-23
|
40
|
150
|
110
|
76
|
85
|
18
|
2
|
4
|
4-18
|
130
|
110
|
322
|
|
40
|
25
|
170
|
125
|
76
|
95
|
26
|
3
|
4
|
4-23
|
50
|
165
|
125
|
88
|
100
|
20
|
3
|
4
|
4-18
|
135
|
120
|
352
|
|
50
|
32
|
195
|
145
|
88
|
112
|
28
|
3
|
4
|
4-26
|
65
|
185
|
145
|
110
|
120
|
22
|
3
|
4
|
8-18
|
155
|
135
|
425
|
|
65
|
32
|
220
|
170
|
110
|
138
|
32
|
3
|
4
|
8-26
|
80
|
200
|
160
|
121
|
135
|
22
|
3
|
4
|
8-18
|
175
|
160
|
570
|
|
80
|
40
|
230
|
180
|
121
|
148
|
34
|
3
|
4
|
8-26
|
100
|
235
|
190
|
150
|
160
|
24
|
3
|
4.5
|
8-23
|
175
|
160
|
560
|
|
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
|
690
|
|
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
|
935
|