Butterfly Dampers - Flexatherm Expanllow Pvt. Ltd.

Flexatherm Butterfly Dampers are high-performance flow control solutions designed for various industrial ducting applications. Engineered for simplicity and reliability, these dampers provide an efficient means of regulating or isolating the flow of flue gas, process air, and other gaseous media in both low and high-temperature environments.

Design & Construction

Our Butterfly Dampers feature a single-blade design pivoting on a central or offset shaft. Each unit is custom-fabricated using heavy-duty materials to ensure structural integrity under thermal stress. The aerodynamic blade design minimizes pressure drop across the valve while providing precise flow modulation.

Key Features

• Robust Construction: Heavy-duty frames and reinforced blades designed to prevent warping or binding.

• High Sealing Efficiency: Available with various seating options—including metal-to-metal, step-seat, or tadpole seals—to achieve up to 99.5% tightness (higher with air seal systems).

• Low Maintenance: Simple mechanical design with external bearings for easy lubrication and heat dissipation.

• Versatile Actuation: Can be equipped with manual levers, gearboxes, pneumatic cylinders, or electric actuators for automated process control.

• Compact Design: Short face-to-face dimensions allow for easy installation in tight ducting layouts.

Technical Specifications

• Sizes: Custom-built from 100mm up to 4000mm+ in diameter.

• Materials: Carbon Steel, Stainless Steel (304, 316, 321), and specialized Heat-Resistant Alloys (Inconel, Hastelloy) for extreme temperatures.

• Temperature Range: Capable of operating in environments ranging from ambient up to 800°C.

• Shaft Sealing: Advanced packing glands and stuffing boxes to prevent external leakage.

• Bearings: High-temperature outboard bearings to ensure smooth operation and longevity.

Industrial Applications

Flexatherm Butterfly Dampers are critical components in systems requiring flow regulation or shut-off:

• Power Plants: Boiler exhaust, FGD (Flue Gas Desulfurization) systems, and SCR units.

• Cement & Steel Industry: Kiln gas control, dust collection systems, and furnace exhausts.

• Chemical & Petrochemical: Incinerators, thermal oxidizers, and waste heat recovery units.

• Refineries: Stack isolation and process gas bypass lines.

• General Ventilation: Large-scale industrial air handling and exhaust management.

Why Partner with Flexatherm?

• Custom Engineering: Every damper is designed using sophisticated CAD and FEA tools to meet specific site conditions and pressure requirements.

• International Standards: Manufactured in compliance with global engineering codes and safety regulations.

• Proven Performance: Trusted by global leaders such as ThyssenKrupp, FLSmidth, and Mitsubishi for critical isolation and modulation tasks.