VKF41.80C-MH Siemens Valve

Overview

The Siemens VKF41.80C-MH is a 3-inch (DN80) flanged butterfly valve designed for the proportional control of air and gas volumes. This specific model features a factory-installed manual handle kit (MH), allowing it to function as a manual flow restrictor. Built with a stainless steel disk and spindle, it provides a metallically tight shutoff and is engineered for integration into gas trains and combustion plants. While primarily used for manual adjustment, the base VKF41 series is compatible with Siemens SQM actuators for automated modulating control.

Features

• Manual handle kit included for precise manual flow restriction and positioning
• Stainless steel disk and spindle ensure durability and resistance to corrosion
• Metallically tight-closing design with low leakage rates (typically <0.22% of kvs)
• Locking manual handle includes a valve position indicator for easy monitoring
• Maintenance-free design suitable for long-term industrial use
• Versatile mounting between counter-flanges (PN6, PN10, PN16)
• Accommodates flow in either direction for flexible installation

Specifications

• Model: VKF41.80C-MH
• Nominal Diameter: DN80 (3 inches)
• Flow Capacity (kvs): 400 m3/h
• Angular Rotation: 85 to 90 degrees
• Media Temperature Range: -10 C to +120 C
• Maximum Operating Pressure: 1600 kPa (16 bar)
• Material (Body): Cast iron EN-GJL-250
• Material (Internal Set): Stainless steel
• Media Compatibility: Air, natural gas, propane, and inert gases (Families I to III)

Applications

• Manual flow regulation in industrial and commercial combustion plants
• Supervision and control of air or gas volumes in burner gas trains
• Use as a manual flow restrictor in HVAC and boiler systems
• Integration into gas trains for precise throttling of fuel or air supply
• Suitable for chilled and low-temperature hot water in closed circuits (base valve type)