VKF41.125C Siemens Valve

Overview

The Siemens VKF41.125C is a high-performance flanged butterfly valve specifically designed for the precise flow control of gases in industrial combustion plants and HVAC systems. As a wafer-type valve, it is engineered to be mounted between counter-flanges and features a robust metallic tight-closing disk to ensure minimal leakage. This 5-inch valve is often integrated into gas trains to throttle air, natural gas, or propane, providing reliable and maintenance-free operation for large-scale applications.

Features

• Metallic tight shutoff disk with a low leakage rate of less than 0.7%
• Rugged cast iron housing (EN-GJL-250) for durability in industrial environments
• Stainless steel disk and spindle for enhanced corrosion resistance
• Bi-directional flow capability for flexible installation
• Compatible with Siemens SQM actuators (such as SQM33, SQM40, SQM45, or SQM50) using specific mounting kits
• Maintenance-free design with an 85 to 90-degree angle of rotation

Specifications

• Model: VKF41.125C
• Nominal Size: 5 inches (DN125)
• Connection Type: Flanged (fits between PN6, PN10, PN16 counter-flanges to ISO 7005)
• Maximum Flow Capacity: 1000 m³/h (kvs)
• Operating Pressure: Maximum 150 kPa (1.5 bar / 20 psig)
• Flowing Temperature Range: 0°F to 140°F (-18°C to 60°C)
• Materials: Cast iron body, stainless steel spindle and disk, and Buna-N O-rings
• Weight: Approximately 9 lbs (4.1 kg)

Applications

• Precision flow regulation in commercial and industrial heating systems
• Throttling and control of air, natural gas, and propane in gas trains
• Use as a control or shut-off valve in boiler and chiller sequencing circuits
• Integration into Siemens modular combustion control solutions for burner applications
• Air and flue gas regulation in large-scale combustion processes