Ball valve  Series
Stop valve  Series
Relief valve  Series
Oxygen valve  Series
Filter  Series
Vacuum valve  Series
 
 

Classification:Relief valve

Trade names:



Bring spanner spring opening type relief valve jointly
Classification of the products: Series of the relief valve

The detailed materials of the products:


A48Y type is suitable for the equipment and pipeline of such medium as working temperature ≤ steam , air of 350 degrees Centigrade ,etc.. A44Y is suitable for the equipment or pipeline of such medium as working temperature ≤ air , petroleum of 300 degrees Centigrade ,etc., as exceeding pressing protectors.
Join standard PN<6.4MPa of flange according to 1 of JB/T-94 series. PN≥ 6.4MPa, according to 2 standards of JB/T-94 series.


Main spare part material

NO.
Part name
A48Y-C A44Y-C material
A44Y-P material
A44Y-R material
1
The valve has body
WCB
ZG1Cr18Ni9Ti
CF8M
2
Valve seat
2Cr13
1Cr18Ni9Ti
316
3
Regulate and enclose
ZG2Cr13
ZG1Cr18Ni9Ti
0Cr18Ni12Mo2Ti
4
Recoil plate
ZG2Cr13
ZG1Cr18Ni9Ti
316
5
Valve one
2Cr13
1Cr18Ni9Ti
316
6
Lead set
2Cr13
1Cr18Ni9Ti
0Cr18Ni12Mo2Ti
7
The valve covering
ZG230-450
ZG230-450
ZG230-450
8
Spring
50CrVA
50CrVA wraps up and covers the fluoroplastics
50CrVA wraps up and covers the fluoroplastics
9
Valve stem
2Cr13
1Cr18Ni9Ti
1Cr18Ni12Mo2Ti
10
Spanner
ZG200-400
ZG200-400
ZG200-400
11
Adjust spiral shell's pole
45
2Cr13
2Cr13
12
Protect and cover
ZG200-400
ZG200-400
316
Seal the surface material
Pile and weld the base hard alloy of Co

External dimension and size of connecting

Type
Nominal and open directly
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
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


   

 
       
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