Overview
The Siemens VKF41.65C-MH is a 2-1/2 inch flanged butterfly valve equipped with a manual handle, designed for the precise flow regulation of air and gas in combustion and HVAC systems. This wafer-type valve is engineered for mounting between counter-flanges and features a robust, metallic tight-closing design to ensure high reliability and safety. It is a critical component for industrial burner applications, often used as a control or shut-off device for gases such as natural gas, propane, and air.
Features
- Metallic tight shutoff with a low leakage rate of approximately 0.6% to 0.9% of kvs
- Manual handle kit with a locking mechanism to secure the valve in any position
- Integrated position indicator showing the disc angle
- Maintenance-free design with stainless steel disk and spindle for durability
- Beveled disc allowing for an 85 to 90 degree angle of rotation
- Bi-directional flow capability for flexible installation
Specifications
- Model: VKF41.65C-MH
- Size: 2-1/2 inch (DN65)
- Connection Type: Flanged (fits between PN6, PN10, PN16 flanges)
- Body Material: Cast iron (EN-GJL-250)
- Disk/Shaft Material: Stainless steel
- Flow Capacity (kvs): 200 m3/h
- Maximum Operating Pressure: Up to 20 psig (140 kPa) for gas applications
- Temperature Range: -10 to 120 C (14 to 248 F) depending on the medium
Applications
- Control of air, natural gas, and propane in industrial and commercial combustion plants
- Flow regulation in gas trains for burners and boiler systems
- Use as a manual flow restrictor or shut-off valve in HVAC and heating systems
- Integration into larger Siemens modular combustion control assemblies
- Suitable for both industrial gas and air control applications requiring precise throttling



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