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Shanghai Hengxing Pump and Valve Manufacturing Co., Ltd
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Bellows seal balance safety valve
Bellows balanced safety valve
Product details
Bellows seal balance safety valve
Series model
WA42Y-16C This valve is suitable for use as an overpressure protection device on equipment or pipelines with unstable back pressure or toxic or corrosive media operating at temperatures ≤ 200 ℃. The standard for connecting flanges ≤ 4MPa adopts JB/T6... 94 series 1 4MPa adopts JB/T... 94 series 2 standard.

WA42Y structural diagram

WA42Y-25
WA42Y-40
WA42Y-64
WA42Y-100

WA42Y-16P

WA42Y-25P
WA42Y-40P
WA42Y-64P
WA42Y-100P

WA42Y-16R

WA42Y-25R
WA42Y-40R
WA42Y-64R
WA42Y-100R

Main component materials

NO.
Part name
WA42Y-C material
WA42Y-P material
WA42Y-R material
1
valve body
WCB
ZG1Cr18Ni8Ti,304
CF8M
2
valve seat
2Cr13
1Cr18Ni8Ti
316
3
Adjusting ring
2Cr13
1Cr18Ni8Ti
0Cr18Ni12Mo2Ti
4
Valve flap
2Cr13
1Cr18Ni8Ti
316
5
Disc holder
2Cr13
1Cr18Ni8Ti
316
6
corrugated tube
304
304
316
7
Guide Sleeve
2Cr13
1Cr18Ni8Ti
0Cr18Ni12Mo2Ti
8
valve cover
ZG230-450
ZG230-450
ZG230-450
9
spring
50CrVA
50CrVA coated fluoroplastic
50CrVA coated fluoroplastic
Sealing surface material

External dimensions and connection 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

WA42Y-16
WA42Y-16P
WA42Y-16R

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
18
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
857
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
WA42Y-25
WA42Y-25P
WA42Y-25R
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
WA42Y-40
WA42Y-40P
WA42Y-40R
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
60
200
160
121
135
24
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
188
176
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
838
200
125
375
320
260
282
38
3
4.5
12-30
250
405
355
320
30
3
12-26
300
260
992
WA42Y-64
WA42Y-64P
WA42Y-64R
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
22
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
4
8-18
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
WA42Y-100
WA42Y-100P
WA42Y-100R
25
16
140
100
58
78
24
3
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
2
4
4-23
50
165
125
88
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
894

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