Vacuum butterfly valve
Keywords:
Valve Encyclopedia
Category:
- Product Description
-
Product Use
Vacuum butterfly valves are widely applicable to various media in production processes such as building materials, metallurgy, mining, and condensation units in air-cooled power plant systems. They are suitable for pipelines with temperatures up to 300℃ and nominal pressures ranging from 0.1 to 1.0 MPa, and are used for connecting, opening/closing, or regulating the flow of media.
Product Features
· Compact structure and lightweight: The vacuum butterfly valve is designed and manufactured using a new structural configuration, featuring a compact design and light weight for easy installation and maintenance.
· Low flow resistance and high flow capacity: Its flow path design is optimized for low flow resistance and high flow capacity, enabling it to meet the demands of various operating conditions and ensuring smooth fluid flow in vacuum systems.
· Reliable operation and long service life: The vacuum butterfly valve has no vulnerable parts such as connecting rods or bolts, ensuring reliable operation and a long service life.
· Excellent sealing performance: Utilizing advanced sealing materials and sealing structures, this product boasts superior sealing performance, effectively preventing medium leakage and meeting the sealing requirements of vacuum systems.
● High-temperature resistance: The vacuum butterfly valve features high-temperature resistance and is suitable for vacuum systems operating in high-temperature environments.
● Precise flow regulation and automatic heating function: By adjusting the opening of the valve disc, the flow rate through the valve can be precisely controlled to meet various process requirements. In response to low-temperature conditions in the air-cooling island of air-cooled generator sets, our company has installed insulation devices and automatic temperature-limiting electric heating tapes on vacuum valves. When the temperature drops below the set point, the heating tape automatically activates to start heating; once the temperature reaches the set high-point, the heating tape automatically shuts off, thereby preventing the valve’s sealing element from freezing and avoiding valve leakage or failure to open.
Main Technical Parameters
Model
YZD942X-2.5(10)C
Nominal Diameter DN (mm)
500-4000
Nominal pressure PN (MPa)
0.25–1.0
Test pressure PN (MPa)
1.5XPN
Sealing test pressure PN (MPa)
1.1XPN
Working pressure PN (MPa)
0.25–1.0
Applicable medium
Water, water vapor, air
Applicable temperature (℃)
≤150, ≤300
Leakage amount
Zero leakage
Flange Connection Dimension Standards
GB/T9124.1
Pressure Test Standard
GB/T13927
Main component materials
Valve body, valve disc
QT450-10, WCB, Q235B
Valve shaft
20Cr13, 304, 316L
Sealing surface
304, 316L
Sealing ring
NBR, EPDM, fluororubber, etc.
Bearing
Stainless steel self-lubricating bearing
Filler
Flexible graphite
Main external dimensions and connection dimensions: mm
DN
L
H1
H2
H3
A1
A2
middle
0.25MPa
0.6MPa
1.0MPa
1.6MPa
Short
long
D1
n-d
D1
n-d
D1
n-d
D1
n-d
50
108
150
82.5
150
255
191
126
200
110
4-φ14
110
4-φ14
125
4-φ19
125
4-φ19
65
112
170
92.5
165
255
191
126
200
130
4-φ14
130
4-φ14
145
4-φ19
145
4-φ19
80
114
180
100
170
255
191
126
200
150
4-φ19
150
4-φ19
160
8-φ19
160
8-φ19
100
127
190
125
195
255
191
126
200
170
4-φ19
170
4-φ19
180
8-φ19
180
8-φ19
125
140
200
142
220
302
240
175
300
200
8-φ19
200
8-φ19
210
8-φ19
210
8-φ19
150
140
210
160
250
302
240
175
300
225
8-φ19
225
8-φ19
240
8-φ23
240
8-φ23
200
152
230
190
275
302
240
175
300
280
8-φ19
280
8-φ19
295
8-φ23
295
12-φ23
250
165
250
220
305
410
552
101
360
335
12-φ19
335
12-φ19
350
12-φ23
355
12-φ28
300
178
270
245
350
410
552
101
360
395
12-φ23
395
12-φ23
400
12-φ23
410
12-φ28
350
190
290
278
385
473
625
152
500
445
12-φ23
445
12-φ23
460
16-φ23
470
16-φ28
400
216
310
306
435
473
625
152
500
495
16-φ23
495
16-φ23
515
16-φ28
525
16-φ31
450
222
330
346
490
473
625
152
500
550
16-φ23
550
16-φ23
565
20-φ28
585
20-φ31
500
229
350
375
505
488
680
375
500
600
20-φ23
600
20-φ23
620
20-φ28
650
20-φ34
600
267
390
425
605
488
680
375
500
705
20-φ26
705
20-φ26
725
20-φ31
770
20-φ37
700
292
430
496
675
488
680
375
500
810
24-φ26
810
24-φ26
840
24-φ31
840
24-φ37
800
318
470
560
740
550
412
757
300
920
24-φ31
920
24-φ31
950
24-φ34
950
24-φ40
900
330
510
625
805
550
412
757
300
1020
24-φ31
1020
24-φ31
1050
28-φ34
1050
28-φ40
1000
410
550
680
865
550
412
757
300
1120
28-φ31
1120
28-φ31
1160
28-φ37
1170
28-φ43
1200
470
630
800
1065
600
452
830
400
1320
32-φ31
1340
32-φ34
1380
32-φ40
1390
32-φ49
1400
530
710
920
1207
670
452
830
400
1520
36-φ31
1560
36-φ37
1590
36-φ43
1590
36-φ49
1600
600
790
1030
1317
680
475
943
305
1730
40-φ31
1760
40-φ37
1820
40-φ49
1820
40-φ56
1800
670
870
1275
1510
885
577
1021
458
1930
44-φ31
1970
44-φ40
2020
44-φ48
2020
44-φ56
2000
760
950
1408
1600
885
577
1021
458
2130
48-φ30
2180
48-φ43
2230
48-φ48
2230
48-φ62
2200
800
1000
1450
1740
915
750
1070
458
2340
52-φ33
2390
52-φ43
2440
52-φ56
2440
52-φ62
2400
850
1100
1675
1875
915
750
1070
458
2540
56-φ33
2600
56-φ43
2650
56-φ56
2650
56-φ62
2600
900
1200
1745
2010
1045
910
1192
500
2740
60-φ33
2810
60-φ48
2850
60-φ56
2850
60-φ62
2800
950
1300
1818
2100
1045
910
1192
500
2960
64-φ36
3020
64-φ48
3070
64-φ56
3070
64-φ70
3000
1000
1400
1910
2200
1190
1020
1310
500
3160
68-φ36
3220
68-φ48
3290
68-φ62
3300
68-φ70
3200
1100
2050
2450
1190
1190
1020
1310
3360
72-φ36
3430
72-φ48
3520
72-φ62
3530
72-φ70
3400
1200
2200
2600
1340
1340
1170
1480
3560
76-φ36
3640
76-φ48
3730
76-φ62
3760
76-φ70
3600
1200
2350
2800
1340
1340
1170
1480
3770
80-φ36
3860
80-φ56
3950
80-φ62
4000
80-φ70
3800
1200
2500
3000
1560
1560
1320
1670
3970
80-φ39
4080
80-φ56
4170
80-φ62
4240
80-φ78
4000
1300
2600
3150
1560
1560
1320
1670
4170
84-φ39
4300
84-φ56
4400
84- phi 70
4480
84-φ78
Note:
1. For detailed valve dimensions and installation requirements, including standpipe and pipeline network components, please request them from the company.
2. Our company can design and manufacture valves individually according to your requirements, but this must be specified in the contract.
3. The H2 in the table can be lengthened according to user requirements (extended-stem butterfly valve).
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No. 55, Jinjiangnan Road, Shangjie District, Zhengzhou City, Henan Province
Phone:+86-371-68122889
Email:zzsfmjt@126.com
Mobile phone:+86-13703990948
Fax:0371-68122899
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