Overview
The Siemens VKF41.50H-MH is a high-temperature, flanged butterfly valve specifically designed for the precise modulation and control of hot air and flue gas recirculation (FGR). This 2-inch industrial valve is part of the VKF41 series and comes equipped with a manual handle assembly, allowing for local flow restriction and manual control. Its robust construction features a cast iron body and stainless steel internal components, making it a reliable solution for demanding combustion environments where temperatures can reach up to 550 degrees F.
Features
- High-temperature compatibility designed to withstand gas temperatures up to 550 degrees F
- Integrated manual handle kit including a position indicator and a handle with clamping pieces to lock the valve in any position
- Wafer-style design suitable for mounting between ANSI or DIN pipe flanges
- Bi-directional flow capability allows for flexible installation in various piping configurations
- Maintenance-free internal mechanics with self-lubricating PTFE-filled bearings
- Stainless steel disk and shaft for superior corrosion resistance and durability
Specifications
- Model: VKF41.50H-MH
- Size: 2 inches (DN50)
- Nominal Flow Rate (kvs): 80 m3/h
- Maximum Temperature: 550 degrees F (288 degrees C)
- Maximum Operating Pressure: 20 psig (140 kPa)
- Body Material: Grey cast iron EN-GJL-250
- Disk and Shaft Material: Stainless steel
- Rotation Angle: 360 degrees
- Mounting: Between flanges PN6, PN10, or PN16
Applications
- Flue gas recirculation (FGR) systems in industrial burners
- High-temperature hot air control in combustion processes
- Manual flow restriction for boiler and furnace systems
- Industrial and commercial HVAC systems requiring local manual adjustment
- Balancing and throttling of air or inert gas lines in heating plants


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