Overview
The Siemens VKF41.125C-MH is a high-performance 5-inch flanged butterfly valve equipped with a manual handle, designed for the precise regulation of gas and air flow in combustion and HVAC systems. Built for durability and ease of operation, this wafer-type valve is engineered for integration into gas trains and industrial burner systems, ensuring reliable performance in demanding environments. It features a metallically tight shutoff and a robust design that supports high flow capacities while maintaining low leakage rates.
Features
- Manual handle with a locking mechanism and integrated valve position indicator for precise manual control
- High-quality stainless steel disk and spindle for enhanced corrosion resistance and longevity
- Metallically tight-closing design provides a secure shutoff with minimal leakage
- Bidirectional flow capability allows for flexible installation in various piping configurations
- Robust grey cast iron housing suitable for mounting between counter-flanges
- Maintenance-free design reduces long-term operational costs and downtime
Specifications
- Model: VKF41.125C-MH
- Size: 5 inches (DN125)
- Connection: Flanged (fits between PN6, PN10, or PN16 flanges per ISO 7005)
- Flow Capacity (kvs): 1000 m3/h
- Leakage Rate: Less than 0.7% of kvs
- Angle of Rotation: 85 degrees (with beveled disk)
- Operating Pressure: Maximum 150 kPa (1.5 bar)
- Temperature Range: 0 to 140 F (-18 to 60 C)
- Material: Cast iron EN-GJL-250 body, stainless steel disk and shaft, Buna-N O-rings
Applications
- Precise flow regulation of air, natural gas, and propane in combustion plants
- Manual flow restriction and isolation in industrial and commercial heating systems
- Control of gas trains for industrial burners and boiler systems
- Air and flue gas regulation in HVAC and power generation facilities
- Integration into modular Siemens combustion control solutions for simplified maintenance and setup



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