Overview
The Siemens VKF41.200C is a high-capacity butterfly valve specifically designed for the proportional control of air and gas flows in industrial combustion systems. This 8-inch (DN200) wafer-style valve is engineered to be mounted between flanges and provides a robust solution for regulating gas trains. Featuring a metallic tight-closing disk and spindle made of stainless steel, it ensures reliable performance and durability. The VKF41.200C is often integrated into larger burner systems and requires a high-torque actuator for precise modulation and automated operation.
Features
- Designed for fitting between counter-flanges (wafer-type) for easy integration into gas trains
- Stainless steel disk and spindle provide resistance to corrosion and wear
- Metallic tight shutoff mechanism limits leakage to less than 0.7 percent of the kvs value
- Maintenance-free design reduces long-term operational costs and downtime
- Accommodates flow in either direction, offering flexibility during installation
- Beveled disk design allows for an 85-degree angle of rotation for precise flow control
- Includes centering sleeves to ensure proper alignment between PN6, PN10, and PN16 flanges
Specifications
- Model: VKF41.200C
- Nominal Size: 8 inches (DN200)
- Nominal Flow Rate (kvs): 4000 m3/h
- Angle of Rotation: 85 degrees
- Operating Pressure: -5 to 20 psig (-35 to 140 kPa)
- Media Compatibility: Air, natural gas, propane, and other clean gases (Families I to III)
- Temperature Range: 0 to 140 F (-18 to 60 C)
- Leakage Rate: Less than 0.7 percent of kvs
- Body Material: Cast iron (EN-GJL-250)
- Disk and Spindle Material: Stainless steel
- Weight: Approximately 19 lbs (8.6 kg)
Applications
- Proportional flow control in gas trains of industrial and commercial burners
- Regulation of air or gas volume in high-capacity combustion plants
- Integration into boiler systems and large-scale HVAC units for energy-efficient modulation
- Suitable for use with various gas types including natural gas and propane
- Compatible with Siemens SQM actuators (such as SQM5x, SQM40, or SQM33 series) via specific mounting kits for automated burner management systems



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