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The BY42 electric louver butterfly valve is an industrial automation control device widely used in metallurgy, chemicals, building materials, power plants, and environmental protection industries. The valve mainly consists of a body, louver blades, shafts, and an electric actuator. Driven by the electric actuator, multiple groups of louver blades rotate synchronously within a 90° range to precisely regulate or shut off the flow of air, flue gas, or dust-laden gas in the pipeline. Due to its multi-axis louver structure, the valve features low flow resistance, rapid opening and closing, short structural dimensions, and light weight, making it especially suitable for large-diameter, high-flow, and low-pressure-differential systems.

Product Image of BY42 Electric Louver Butterfly Valve
Feature
1.Compact and lightweight design:The ultra-short face-to-face length significantly reduces the mechanical load on the pipeline compared to traditional control valves.
2.Low flow resistance and high efficiency:The streamlined blade design ensures a near-straight flow path when fully open, resulting in minimal pressure drop.
3.Low operating torque and smooth motion:The multi-axis linkage balanced structure offsets most of the fluid impact force.
4.Temperature and corrosion resistance:Available in carbon steel, stainless steel, or wear-resistant steel to adapt to high-temperature flue gas or corrosive conditions.
5.Intelligent actuation:Equipped with an intelligent actuator that supports 4-20mA signal regulation and real-time position feedback.
6.Reliable sealing performance:Optional sealing strips provide effective shut-off in both ambient and high-temperature environments.
7.Long service life:Core rotating parts utilize self-lubricating bearings to reduce mechanical wear, ensuring long maintenance cycles.
8.High degree of customization:Available in rectangular or circular structures to meet diverse installation requirements of process piping.

Structural Drawing of BY42 Electric Louver Butterfly Valve
List of Component Names and Materials
| Part Name | Valve Body | Louver Disc | Valve Stem | Packing |
| Material | Carbon Steel, Q235A | Carbon Steel, Q235A | Stainless Steel, 2Cr13 | Flexible Graphite |
Performance Specification Sheet
| Performance Specification Sheet | |||
| Nominal Pressure | 0.6 | 1.0 | MPa |
| Strength test pressure | 0.9 | 1.5 | |
| Sealing test pressure | 0.66 | 1.1 | |
| Applicable Temperature | -30~+250 | ℃ | |
Standard requirements for external dimensions
1. The structural length of the valve shall comply with the standard of GB/T12221
2. Connecting flanges according to GB/T17241.6 standard
Outline dimension table
| DN | L | D | D1 | b | Z-d | H | H1 |
| 360 | 180 | 416 | 394 | 8 | 12-12 | 840 | 600 |
| 400 | 180 | 500 | 450 | 8 | 12-12 | 922 | 652 |
| 500 | 220 | 600 | 555 | 8 | 20-18 | 1150 | 820 |
| 600 | 220 | 700 | 655 | 10 | 20-18 | 1250 | 870 |
| 700 | 240 | 800 | 755 | 10 | 20-18 | 1340 | 920 |
| 800 | 240 | 930 | 870 | 10 | 24-23 | 1632 | 1112 |
| 900 | 260 | 1040 | 970 | 12 | 24-23 | 1720 | 1162 |
| 1000 | 260 | 1140 | 1070 | 12 | 28-23 | 1840 | 1220 |
| 1120 | 280 | 1250 | 1190 | 12 | 28-23 | 2110 | 1430 |
| 1250 | 280 | 1380 | 1320 | 14 | 32-23 | 2240 | 1495 |
| 1400 | 300 | 1530 | 1470 | 14 | 36-23 | 2370 | 1570 |
| 1500 | 300 | 1630 | 1570 | 14 | 40-23 | 2480 | 1620 |
| 1600 | 320 | 1730 | 1670 | 14 | 40-23 | 2660 | 1745 |
| 1800 | 340 | 1930 | 1870 | 16 | 44-23 | 2860 | 1845 |
| 2000 | 360 | 2130 | 2070 | 16 | 48-23 | 3060 | 1945 |
| 2200 | 445 | 2335 | 2292 | 18 | 48-23 | 3220 | 2030 |
| 2240 | 380 | 2370 | 2310 | 18 | 48-23 | 3330 | 2095 |
| 2500 | 420 | 2630 | 2570 | 18 | 52-23 | 3590 | 2225 |
| 2800 | 440 | 2930 | 2870 | 18 | 60-23 | 3890 | 2375 |
| 3000 | 460 | 3130 | 3070 | 18 | 60-23 | 4090 | 2475 |

Model:
D943H-10C/D943H-16C/D943H-25C/D943H-40C/D943H-10P/D943H-16P/D943H-25P/D943H-40P/D943H-10R/D943H-16R/D943H-25R/D943H-40RSpecification:
DN50-DN2000Pressure:
PN10~40Material:
Carbon Steel, Stainless Steel
Model:
D941X-10/D941X-16/D941X-10Q/D941X-16Q/D941X-10C/D941X-16C/D941X-10P/D941X-16PSpecification:
DN50-DN2000Pressure:
PN10~PN16Material:
Cast iron, cast steel, stainless steel + rubber lining, fluorine lining
Model:
D942X-6Q/D942X-10Q/D942X-16Q/D942X-6P/D942X-10P/D942X-16PSpecification:
DN50-DN3000Pressure:
PN6~PN16Material:
Ductile iron, stainless steel