Overview
The Siemens VKF41.40C is a flanged butterfly valve specifically engineered for the precise control and shut-off of air and various gases, including natural gas and propane. Designed for integration into gas trains within combustion plants, this 1.5 inch (DN40) valve features a wafer-type design meant for fitting between counter-flanges. It is a critical component for OEMs and industrial HVAC systems, providing a metallically tight shut-off to ensure safety and efficiency in burner and boiler operations.
Features
- Metallically tight-closing disk ensures minimal leakage in the fully closed position
- Constructed with a durable grey cast iron body and stainless steel disk and spindle for long-term reliability
- Maintenance-free design reduces operational costs and downtime
- Bi-directional flow capability allows for versatile installation options
- Compatible with a range of Siemens electromotoric actuators, such as the SQM or SAL series, using specific mounting kits
- Integrated end stop for the 90 degree angle of rotation
Specifications
- Model: VKF41.40C
- Nominal Diameter: DN40 (1.5 inches)
- Nominal Pressure: PN 6, PN 10, PN 16 (ISO 7005)
- Maximum Operating Pressure: 150 kPa (1.5 bar)
- Flow Rate (kvs): 50 m3/h (at 1 bar differential pressure)
- Medium Temperature Range: -15 C to +60 C
- Angle of Rotation: 90 degrees
- Material: Cast iron EN-GJL-250 (Body), Stainless Steel (Disk/Spindle), NBR (Spindle Seal)
Applications
- Used as a control or shut-off valve in gas trains for industrial and commercial burners
- Throttling and regulation of air, natural gas, propane, and other family I-III gases
- Integration into heating, ventilation, and air conditioning systems
- Suitable for use in boiler and chiller sequencing circuits
- Ideal for combustion plants requiring reliable fuel-to-air ratio control when paired with precise actuators



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