VKF41.65H-MH Siemens Valve

Overview

The Siemens VKF41.65H-MH is a high-temperature wafer-style butterfly valve designed specifically for the control of hot gases, such as flue gas recirculation (FGR) and hot air systems. This DN65 (2.5-inch) valve features a manual handle (-MH) that allows it to function as a manual flow restrictor with a locking mechanism to secure the valve disk at any desired position. Engineered for durability in extreme environments, it utilizes a metallic tight-closing design and high-grade materials to ensure reliable performance in combustion plants and industrial process applications.

Features

• High-temperature resistance suitable for media up to 550°F (288°C)
• Manual handle kit (-MH) includes a position indicator and clamping pieces for locking
• 360-degree angular rotation for flexible flow adjustment
• Metallic tight-closing seat for minimal leakage in the closed position
• Wafer-type design for easy installation between standard pipe flanges
• Maintenance-free construction for reduced operational downtime
• Bidirectional flow capability allows for installation in either direction

Specifications

• Model: VKF41.65H-MH
• Nominal Size: DN65 (2.5 inches)
• Connection Type: Wafer style (mounts between PN6, PN10, PN16, or ANSI flanges)
• Maximum Temperature: 550°F (288°C)
• Body Material: Cast iron (EN-GJL-250)
• Disk and Shaft Material: Stainless steel
• Shaft Seal: PTFE (High-temp version)
• Flow Coefficient (kvs): 231 (approximate)
• Angular Rotation: 360°

Applications

• Flue gas recirculation (FGR) in industrial combustion systems
• Hot air flow control in heating and process plants
• Manual flow restriction and balancing in gas trains
• Integration into burner systems for air and gas modulation
• Waste heat recovery and high-temperature ventilation systems