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S U D E

Multi-Lovure Dampers

Multi-Lovure Dampers – Series 1902

Advanced Air & Gas Flow Control Solutions by SUDE Engineering Pvt Ltd.

SUDE Engineering Pvt. Ltd. is a reputed manufacturer of high-performance Multi-Lovure Damper Valves (MLDV), specifically engineered for precise regulation, modulation, and positive isolation of air and flue gases in large-scale industrial ducting systems.

Multi-Lovure Dampers are constructed with multiple parallel blades (louvers) mounted on a common operating mechanism, allowing synchronized movement for uniform and controlled airflow. This design ensures balanced flow distribution, reduced turbulence, and minimal pressure loss, making them highly efficient for both on/off and modulating service.

SUDE MLDVs are designed to perform reliably in high-temperature, abrasive, dusty, and corrosive environments, commonly encountered in power generation, steel plants, cement kilns, refineries, chemical plants, and pollution control systems. The blades and shafts are engineered with robust materials and optimized profiles to withstand thermal expansion, vibration, and continuous operation.

To meet diverse application requirements, SUDE Multi-Louvre Dampers are available in single-bank or multi-bank configurations, with opposed-blade or parallel-blade arrangements. Multiple sealing options—including metal-to-metal and soft seals—provide high sealing efficiency and reduced leakage, ensuring effective isolation when required.

Designed in accordance with international standards and customer specifications, SUDE MLDVs can be supplied with manual, electric, pneumatic, or hydraulic actuation. When integrated with SDTORK Electric or Pneumatic Actuators, these dampers offer intelligent automation, precise control, and seamless integration into modern DCS and PLC systems.

With in-house design, fabrication, and testing capabilities, each SUDE Multi-Louvre Damper undergoes rigorous quality checks to ensure long service life, operational safety, and consistent performance under demanding industrial conditions.

Technical Specifications

Parameter
Specification
Shapes Available
Circular, Square, and Rectangular
Size Range
300 mm to 12,000 mm (custom-built on request)
Flow Media
Air, Flue Gas, Dusty or Corrosive Media
Blade Type
Parallel Blade / Opposed Blade / Mixed Blade Design
Sealing Efficiency
Up to 99.95% downstream tightness
Sealing Type
EPDM, Viton, Silicone, or Metal-to-Metal
Temperature Range
-25°C to 825°C (up to 1000°C for special designs)
Material of Construction
ASTM A36 / A240 (304L, 316L, 310S) / IS 2062 / A516 Gr.70 / A387 Gr.11 / Custom Options
Pressure Rating
PN 1
End Connections
Wafer, Double Flanged (Short/Long), or Butt Weld Ends
Face-to-Face Standards
API 609 / ASME B16.10 / ISO 5752 / BS EN 558
Flange Drilling
IS 6392 / ASME B16.5 / BS EN 1092-1
Testing Standards
AMCA 511 / ASME AG-1 / ANSI FCI 70-2
Drive Operations
Manual / Electric / Pneumatic / Hydraulic
Design Standards
ASME B16.34 / ERDA 76-21 / ASME SEC VIII, V, IX

Working Principle:

Open Position
Louvers align parallel to airflow, allowing maximum flow with minimal resistance.
Modulating / Throttling
All blades rotate simultaneously through a common linkage or actuator, precisely regulating airflow or gas flow.
Closed Position
Blades seal tightly edge-to-edge or against seating surfaces, ensuring minimal leakage and total isolation.

Actuation Options:

Manual
Lever or Gear-Operated Mechanism
Electric
Motorized for Automated or Remote Operation
Pneumatic
Air-Cylinder Operated for Fast, Repetitive Control
Hydraulic
High-Torque Operation for Large-Scale Applications

Key Features & Advantages

  • Precise and uniform flow control across large ducts
  • Aerodynamic blade design ensures low-pressure drop
  • Long operational life with minimal maintenance
  • Customizable for temperature, size, and corrosion resistance
  • Suitable for both on-off and modulating service
  • Seamless integration with SDTORK Electric & Pneumatic Actuators
  • Designed and tested as per international quality standards

Why Choose SUDE’s Multi-Lovure Damper?

  • Over 20 years of expertise in damper design and automation
  • Advanced in-house design, fabrication & testing capabilities
  • Proven track record in large-size and high-temperature applications
  • Trusted by Power, Oil & Gas, Steel, and Process Industries worldwide
  • Dedicated after-sales service and global project execution experience

SUDE Multi-Lovure Dampers Advantage:

At SUDE Engineering Pvt Ltd., innovation drives performance. Our Multi-Louvre Dampers are designed using advanced 3D modelling and CFD analysis to achieve optimal flow characteristics and efficiency.
Each damper is fabricated in-house with precision machining, stress-relieved welding, and endurance-tested assemblies to ensure consistent quality, reliability, and durability.
When paired with SDTORK Intelligent Actuators, these dampers offer a fully automated, energy-efficient, and safe flow control solution for demanding industrial environments.

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