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Fully open safety valve with wrench spring
A48Y with wrench spring fully open safety valve is suitable for equipment and pipelines with steam, air and other media working temperature ≤ 350 ℃. A
Product details
A48Y with wrench spring fully open safety valve is suitable for equipment and pipelines with steam, air and other media working temperature ≤ 350 ℃.
A44Y with wrench spring fully open safety valve is suitable for equipment or pipelines with working temperature ≤ 300 ℃ for air, petroleum and other media, as an overpressure protection device.
The standard for connecting flanges is JB/T-94 series 1 for PN ＜ 6.4MPa, and JB/T-94 series 2 for PN ≥ 6.4MPa.
Material for main parts
|
NO.
|
Part name
|
A48Y-C A44Y-C material
|
A44Y-P material
|
A44Y-R material
|
|
1
|
valve body
|
WCB
|
ZG1Cr18Ni9Ti
|
CF8M
|
|
2
|
valve seat
|
2Cr13
|
1Cr18Ni9Ti
|
316
|
|
3
|
Adjusting ring
|
ZG2Cr13
|
ZG1Cr18Ni9Ti
|
0Cr18Ni12Mo2Ti
|
|
4
|
Disc holder
|
ZG2Cr13
|
ZG1Cr18Ni9Ti
|
316
|
|
5
|
Valve flap
|
2Cr13
|
1Cr18Ni9Ti
|
316
|
|
6
|
Guide Sleeve
|
2Cr13
|
1Cr18Ni9Ti
|
0Cr18Ni12Mo2Ti
|
|
7
|
valve cover
|
ZG230-450
|
ZG230-450
|
ZG230-450
|
|
8
|
spring
|
50CrVA
|
50CrVA coated fluoroplastic
|
50CrVA coated fluoroplastic
|
|
9
|
valve stem
|
2Cr13
|
1Cr18Ni9Ti
|
1Cr18Ni12Mo2Ti
|
|
10
|
wrench
|
ZG200-400
|
ZG200-400
|
ZG200-400
|
|
11
|
Adjusting the screw
|
45
|
2Cr13
|
2Cr13
|
|
12
|
Protective cover
|
ZG200-400
|
ZG200-400
|
316
|
|
|
Sealing surface material
|
Surfacing weldingCo based hard alloy
|
||
mainExternal dimensions
|
model
|
Nominal Diameter
|
do
|
D
|
K
|
g
|
g1
|
b
|
f
|
f1
|
Z-ød
|
DN'
|
D1
|
K1
|
g3
|
g2
|
b1
|
f'
|
f1'
|
Z1-ød1
|
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
|
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