VKF41.80C Siemens Valve

Overview

The Siemens VKF41.80C is a DN80 (3-inch) flanged butterfly valve designed for the proportional control of gas and air flow in combustion plants. Part of the ACVATIX family, this robust valve features a grey cast iron housing and a stainless steel disk and shaft, ensuring durability and reliable performance. It is engineered to fit between PN6, PN10, or PN16 counter-flanges and provides a metallic tight-closing mechanism to minimize leakage in closed circuits.

Features

• Designed for integration into gas trains for modulating control of air or gas flows
• Disk with metallically tight shutoff with a leakage rate of less than 0.7 percent of kvs
• Maintenance-free design with a 90-degree angle of rotation for precise flow adjustment
• Compatible with various Siemens actuators, including the SQM, SQK, SQL, and SAL series
• Capable of accommodating flow in either direction for flexible installation
• Optional manual handle (MH) or linkage kit (LH) for manual flow restriction or external control

Specifications

• Model: VKF41.80C
• Nominal Diameter: DN80 (3 inches)
• Flow Capacity (kvs): 400 m3/h
• Maximum Operating Pressure: Up to 20 psig (140 kPa)
• Temperature Range: 0 to 140 F (-18 to 60 C) for standard gas applications; up to 248 F (120 C) for water
• Materials: Cast iron EN-GJL-250 housing, stainless steel disk and shaft, Buna-N O-rings
• Connection Type: Wafer type for mounting between counter-flanges (ISO 7005)
• Pressure Class: PN16

Applications

• Proportional flow control for gas families I, II, and III, as well as air
• Used in combustion plants as a control or shut-off device for burners
• Suitable for chilled and low-temperature hot water in closed heating or cooling circuits
• Boiler and chiller sequencing circuits to manage flow to heat exchangers
• Industrial and commercial HVAC systems requiring minimal leakage in the fully closed position