Butterfly Damper for Sale
- Round or rectangular design
- Fully welded body
- Specially engineered compact design
- On/off or modulating
- Typical range from DN300 to DN3000 (other sizes available on request)
- Minimal leakage through robust design and manufacturing
- Available with pneumatic, electric, hydraulic or manual actuator
Butterfly Damper by Temperature
Butterfly Damper by Actuation
Suitable for situations with infrequent changes in traffic volume.
Performing well in high-temperature, high-humidity or corrosive environments.
Excessive torque requirements (DN > 800mm high-pressure pipelines)
Low flow resistance coefficient <0.2
A butterfly damper with a flow resistance coefficient of 0.2 can reduce energy consumption by over 25%. This is especially suitable for large flow pipelines (such as DN3000 ventilation systems), where the energy-saving effect is significant over long-term operation.
Hard seal
The stainless steel valve seat and the welded cobalt-based hard alloy butterfly plate have a hardness of over HRC 60. They achieve a rigid sealing surface through precise processing.
0° - 90° Rotation Adjustment
The damper is installed along the diameter direction of the pipeline. Under the drive of the valve stem, it rotates around the axis from 0° (fully closed) to 90° (fully open). During the rotation process, the cross-sectional area of the flow passage changes linearly to achieve flow regulation.
Why 10,000+ Customers Choose Us
Darko understands the needs of our customers, so each butterfly damper is rigorously tested to ensure long-term stable operation. At the same time, we provide customized services to tailor the most suitable butterfly dampers to meet the challenges of different industrial environments according to your specific needs. Whether it’s technical support, after-sales service, or product delivery cycle, we always focus on our customers and provide a full range of protection for your project to ensure that every aspect is worry-free. By choosing us, you will enjoy industry-leading innovative technology and professional support.
Butterfly damper application cases
The DN800-DN2000 specification butterfly dampers are used for the exhaust gas pipeline at the end of the kiln, with a 304 stainless steel valve body and a hard alloy sealing surface. They can withstand working conditions with a dust concentration of ≤ 50g/Nm³, and the leakage level reaches ANSI Class V.
The import and export are equipped with pneumatic butterfly dampers with diameters ranging from DN500 to DN800. The working pressure is 0.6 – 1.0 MPa, and the temperature resistance is ≤ 120℃. They are used to regulate the material flow. The damper is designed with a flow guiding groove to prevent material accumulation, and it is suitable for the production line of 5,000 tons of cement per day.
We choose Ex dⅡBT4 pneumatic actuators. And the butterfly damper material is aluminum alloy or 316L stainless steel.
The butterfly damper controls the opening degree of the discharge gate, increasing the out-cargo efficiency by 40%.
Explore Specifications and Models of Butterfly Dampers
- Company Production Process
- Technical Specifications
- Butterfly Damper Drawing
- Datasheet
- Pressure: Typically 50Kpa (0.5 barG) however we can design for higher on request
- Temperature: Typically 600°C (1112°F) up to 1250°C (2282°F) on request
- Materials: Carbon steel or stainless steel as standard, with optional chrome moly or higher specification alloys for extreme temperatures or corrosive environments
| DN | D | D1 | B | b | n-d | E | L1 | L2 |
| 100 | 200 | 155 | 180 | 10 | 4-φ14 | 855 | 450 | 620 |
| 150 | 250 | 205 | 180 | 10 | 8-φ14 | 905 | 450 | 620 |
| 200 | 300 | 255 | 180 | 10 | 8-φ14 | 965 | 450 | 620 |
| 250 | 350 | 305 | 180 | 10 | 12-φ14 | 1015 | 450 | 620 |
| 300 | 400 | 355 | 180 | 10 | 12-φ14 | 1085 | 450 | 620 |
| 350 | 450 | 405 | 180 | 10 | 16-φ14 | 1135 | 450 | 620 |
| 400 | 520 | 465 | 200 | 12 | 16-φ18 | 1385 | 500 | 650 |
| 450 | 570 | 515 | 200 | 12 | 16-φ18 | 1440 | 500 | 650 |
| 500 | 620 | 565 | 200 | 12 | 20-φ18 | 1486 | 500 | 650 |
| 600 | 720 | 665 | 200 | 12 | 20-φ18 | 1596 | 500 | 650 |
| 700 | 820 | 765 | 220 | 12 | 20-φ18 | 1780 | 600 | 700 |
| 800 | 920 | 865 | 220 | 12 | 24-φ18 | 1895 | 600 | 700 |
| 900 | 1020 | 965 | 220 | 12 | 24-φ18 | 1995 | 600 | 700 |
| 1000 | 1130 | 1070 | 260 | 16 | 28-φ22 | 2255 | 620 | 780 |
| 1100 | 1230 | 1170 | 260 | 16 | 28-φ22 | 2355 | 620 | 780 |
| 1200 | 1330 | 1270 | 260 | 16 | 28-φ22 | 2455 | 620 | 780 |
| 1300 | 1430 | 1370 | 300 | 16 | 32-φ22 | 2555 | 620 | 820 |
| 1400 | 1530 | 1470 | 300 | 16 | 36-φ22 | 2655 | 620 | 820 |
| 1500 | 1630 | 1570 | 300 | 16 | 36-φ22 | 2770 | 620 | 820 |
| 1600 | 1730 | 1670 | 300 | 16 | 40-φ22 | 2870 | 620 | 820 |
| 1700 | 1830 | 1770 | 340 | 20 | 40-φ22 | 3110 | 650 | 900 |
| 1800 | 1930 | 1870 | 340 | 20 | 44-φ22 | 3210 | 650 | 900 |
| 1900 | 2030 | 1970 | 340 | 20 | 44-φ22 | 3310 | 650 | 900 |
| 2000 | 2130 | 2070 | 340 | 20 | 48-φ22 | 3410 | 650 | 900 |
| 2100 | 2230 | 2170 | 340 | 20 | 48-φ22 | 3525 | 650 | 900 |
| 2200 | 2330 | 2270 | 340 | 20 | 48-φ22 | 3625 | 650 | 900 |
| 2300 | 2430 | 2370 | 380 | 20 | 48-φ22 | 3805 | 650 | 1000 |
| 2400 | 2530 | 2470 | 380 | 20 | 48-φ22 | 3905 | 650 | 1000 |
| 2500 | 2630 | 2570 | 380 | 20 | 52-φ22 | 4005 | 650 | 1000 |
| 2600 | 2730 | 2670 | 380 | 20 | 52-φ22 | 4105 | 650 | 1000 |
| 2700 | 2860 | 2785 | 420 | 24 | 56-φ26 | 4210 | 750 | 1350 |
| 2800 | 2960 | 2885 | 420 | 24 | 60-φ26 | 4310 | 750 | 1350 |
| 2900 | 3060 | 2985 | 420 | 24 | 60-φ26 | 4410 | 750 | 1350 |
| 3000 | 3160 | 3085 | 420 | 24 | 60-φ26 | 4510 | 750 | 1350 |
More Q&A about Butterfly Dampers
If you have any other question not listed in FAQs, please don’t hesitate to contact us; our team will reach out to you very soon and give you personal help to answer your inquiry.
For the most accurate quote please provide the following information:
- Type or style of damper. For example: butterfly, louver, Tee, diverter, etc.
- Preferred material, such as stainless steel, carbon steel, other
- Pressure requirement
- Temperature the damper will be exposed to
- Air flow amount
- Manual, pneumatic or electric a
- ctuation/positioner requiredAmount of shut off needed (usually in %)
Key Differences in Application: Confined vs. Expansive Environments. The core distinction lies in the medium controlled: butterfly valves handle fluids within confined piping, while butterfly dampers manage air in expansive ducting. This translates to differences in pressure containment and operational requirements.
- The butterfly damper can be opened and closed quickly, making it suitable for applications that require frequent flow adjustments.
- The butterfly damper has a compact structure, making it ideal for installation in space-constrained environments.
- It can withstand the impact of abrasive materials such as cement.