VKF41.40H Siemens Valve

Overview

The Siemens VKF41.40H is a high-temperature flanged butterfly valve specifically engineered for the precise control and regulation of hot air or flue gas in combustion and industrial processes. As part of the VKF41 series, the “H” variant is built to withstand significantly higher temperatures than standard models, making it a critical component for systems involving flue gas recirculation (FGR) or heated air. This wafer-type valve is designed for installation between counter-flanges and features a robust metallic tight-closing mechanism to ensure reliable shut-off and long-term durability in demanding thermal environments.

Features

• High-temperature resistance designed for flue gas and hot air applications
• Metallic tight-closing disk provides a secure shut-off with minimal leakage (typically <0.7%)
• Bi-directional flow capability allows for flexible installation in various piping configurations
• 360-degree angle of rotation provides versatile control options (often used with 90-degree actuators)
• Maintenance-free design with a rugged cast iron housing and stainless steel internal components
• Compatible with Siemens SQM or SAL series actuators using specific mounting kits

Specifications

• Model: VKF41.40H
• Nominal Diameter: DN40 (1-1/2 inches)
• Maximum Medium Temperature: 550°F (288°C)
• Flow Capacity (kvs): 50 m³/h
• Angular Rotation: 360°
• Body Material: Grey cast iron (EN-GJL-250)
• Disk and Shaft Material: Stainless steel
• Seal Material: PTFE / Metallic
• Connection: Wafer-style for mounting between PN6, PN10, or PN16 flanges

Applications

• Flue gas recirculation (FGR) systems in industrial burners
• Hot air flow control in combustion processes
• High-temperature air regulation in HVAC and boiler systems
• Boiler and chiller sequencing circuits requiring high-thermal tolerance
• Industrial furnace and oven temperature control applications