Round louvered ventilation butterfly valve
Keywords:
Valve Encyclopedia
Category:
- Product Description
-
Product Use
Widely applicable in ventilation and environmental protection projects involving dusty, cold or hot air gases in industries such as metallurgy, building materials, chemical engineering, power plants, and glass manufacturing.
Product Features
·The valve body and door panel adopt an integral welded structure, featuring a short structural length and light weight.
·The door panel features an integral frame structure, offering excellent rigidity and low flow resistance.
·The louvers feature a multi-axis structure, and the shaft bearings adopt an assembled design for easy maintenance.
· The sealing packing uses flexible graphite, and the sealing specific pressure is adjustable. The valve disc features a streamlined structure, resulting in low flow resistance, uniform flow, small opening and closing torque, sensitive operation, and reliable performance.
· The louver ventilation valve is used for airflow regulation in ducts and cannot be used to shut off the flow.
Standard specifications
Design standards
JB/T8692
Structural length
JB/T8692
Flange connection dimensions
JB/T8692
Inspection and Testing
GB/T13927
Model and Transmission Method
Manual D345W
Snail movement
Pneumatic D645W
Switch/Adjustment/Quick Switch/Explosion-Proof
Electric D945W
Switch/Adjustment/Smart/Explosion-Proof
Main component materials
Valve body
Q235/Q345/304/316
Valve plate
Q235/Q345/304/316
Valve stem
20Cr13
Filler
Flexible graphite/PTFE
D345W·D645W· D945W
Main external dimensions and connection sizes (0.1 MPa) Unit: mm
DN
Structural length
Flange dimensions
External dimensions
L
D
D1
D2
n-Middle
H1
H2
H3
300
170
440
395
363
12-φ22
245
382
145
350
170
490
445
413
12-φ22
280
430
145
400
190
540
495
463
16-φ22
298
470
145
450
190
595
550
518
16-φ22
325
520
180
500
190
645
600
568
20-φ22
355
550
180
600
210
755
705
667
20-φ26
405
618
180
700
210
860
810
772
24-φ26
460
707
180
800
210
975
920
878
24-φ30
520
775
220
900
250
1075
1020
978
24-φ30
575
840
220
1000
250
1175
1120
1078
28-φ30
635
900
220
1200
250
1375
1320
1280
32-φ30
755
1075
240
1400
300
1575
1520
1480
36-φ30
870
1175
240
1600
300
1785
1730
1690
40-φ30
965
1361
240
1800
300
1985
1930
1890
44-φ30
1120
1550
270
2000
300
2185
2130
2090
48-φ30
1280
1675
270
2200
350
2400
2340
2295
52-φ33
1370
1850
270
2400
350
2600
2540
2495
56-φ33
1540
2050
320
2600
350
2800
2740
2695
60-φ33
1620
2160
320
2800
400
3030
2960
2910
64-φ36
1700
2230
320
3000
400
3230
3160
3110
68-φ36
1800
2360
360
3200
400
3430
3360
3310
72-φ36
1980
2540
360
3400
450
3630
3560
3510
72-φ36
2100
2680
360
3600
450
3840
3770
3710
80-φ36
2230
2850
360
3800
450
4045
3970
3910
80-φ39
2350
2990
360
4000
450
4245
4170
4110
84-φ39
2460
3140
360
4200
500
4445
4370
4310
84-φ42
2570
3290
430
4400
500
4645
4570
4510
88-φ42
2690
3430
430
4600
500
4845
4870
4710
92-φ42
2810
3580
430
4800
500
5045
4970
4910
96-φ42
2920
3730
430
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Company address:
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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