Variable Inlet Vane (VIV) Damper
Variable Inlet Vane (VIV) Damper – Series 1903
The Variable Inlet Vane (VIV) Damper – Series 1903, designed and manufactured by SUDE Engineering Pvt. Ltd., is a high-efficiency airflow control device developed for installation at the inlet of centrifugal fans, blowers, and compressors. SUDE VIV Dampers are engineered to precisely regulate airflow and pressure while significantly reducing energy consumption and mechanical stress on rotating equipment.
A SUDE VIV Damper consists of a set of aerodynamically profiled, air-foil shaped vanes arranged circumferentially around the fan inlet. These vanes rotate simultaneously to pre-spin the incoming air in the direction of impeller rotation, improving inlet flow conditions and minimizing turbulence. This advanced control principle developed by SUDE Engineering Pvt. Ltd. delivers superior performance compared to conventional inlet throttling dampers.
By precisely adjusting the vane angle, SUDE VIV Dampers enable accurate modulation of airflow and static pressure while maintaining high fan efficiency across a wide operating range. This results in lower power consumption, reduced motor loading, smoother fan operation, and extended equipment life, particularly in applications with variable process demands.
Designed for continuous-duty industrial service, SUDE Engineering Pvt. Ltd. manufactures VIV Dampers to perform reliably in high-temperature, dusty, abrasive, and corrosive environments. Heavy-duty construction, precision-machined components, and carefully selected materials ensure stable performance, minimal maintenance, and long service life.
SUDE VIV Dampers – Series 1903 are available in custom sizes and configurations to suit specific application requirements. The dampers can be supplied with manual, electric, pneumatic, or hydraulic actuation, allowing seamless integration into modern plant automation and control systems such as PLC, DCS, and SCADA.
Technical Specifications
Parameter
Shapes Available
Circular
Size Range
Available from 200 mm to 3000 mm
Flow Media
Air, Flue Gas, and Process Vapours
Blade Type
Air foil or Flat Vanes arranged circumferentially
Sealing Efficiency
Minimal sealing – designed for modulation, not tight shut-off
Sealing Type
Metal-to-Metal or Non-Sealing (based on application)
Temperature Range
Up to 750°C (custom designs available for higher)
Material of Construction
Carbon Steel, Stainless Steel, Aluminium
Pressure Rating
Low to Moderate Inlet Suction Pressure
Drive Operations
Electric / Pneumatic Actuator with Position Control
Testing Standards
AMCA 511 / ASME AG-1 / ANSI FCI 70-2
Design Standards
ASME B16.34 / ISO 5752 / BS EN 558 / API 609
Working Principle:
Open Position
Vanes are aligned with airflow, offering minimal resistance and allowing maximum air entry into the fan or compressor.
Modulating / Throttling
Actuator adjusts vane angles to partially restrict or redirect flow.
This introduces controlled pre-rotation, effectively reducing load on the impeller and enhancing energy efficiency.
This introduces controlled pre-rotation, effectively reducing load on the impeller and enhancing energy efficiency.
Closed Position
Vanes restrict airflow significantly for low-flow or near shut-off conditions.
Actuation Options:
Electric
Motorized actuator with control signal
Pneumatic
Air cylinder operation with position feedback
Key Features & Advantages
- Improves fan efficiency by reducing energy consumption
- Enables precise modulating control with minimal pressure loss
- Reduces mechanical stress and fan load
- Compact design integrated within fan inlet
- Provides smooth and stable control across a wide flow range
- Compatible with electric or pneumatic actuation systems
Why Choose Variable Inlet Vane (VIV)?
- Expertly engineered for energy optimization and fan efficiency improvement
- Advanced in-house design, fabrication, and testing capabilities
- Proven performance across HVAC, Power, and Process Industries
- Custom-built for specific fan geometries and temperature requirements
- Backed by dedicated technical support and service excellence
SUDE Variable Inlet Vane (VIV) Damper Advantage:
At SUDE Engineering Pvt Ltd., our Variable Inlet Vane Dampers are developed through advanced aerodynamic design and CFD analysis to achieve superior energy efficiency and performance stability.
Each unit is precisely engineered to match the fan or compressor geometry, ensuring optimum flow control and minimal system losses.
Manufactured with high-grade materials and precision-balanced vane assemblies, SUDE VIV Dampers provide reliable and maintenance-free operation in demanding industrial environments.
When paired with SDTORK Actuators, these dampers deliver automated, intelligent, and efficient airflow regulation for modern energy-conscious facilities.
Applications
Fan and blower inlet flow control
Industrial air handling and ventilation systems
HVAC supply air modulation
Thermal power plants – ID/FD/PA fan inlet control
Compressor inlet throttling in process industries
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