HTS KS – Linear Flow Controls IFC, VFC

Overview

The Honeywell IFC and VFC Linear Flow Controls are designed for the adjustment and regulation of gas and air flow rates in continuously modulated burner combustion systems. These compact flow controls deliver a linear relationship between the actuator input signal and the resulting flow rate, ensuring precise and repeatable control across the full operating range.

The VFC linear flow control body is paired with an IC 20 or IC 40 actuator to form a complete flow control assembly. Size 1 bodies in DN 10 through DN 25 with Rp internal thread connections are available for both gas and air service. The IFC and VFC series are EU certified under GAR 2016/426 and UKCA approved to BS EN 13611.

Features & Benefits

• Linear ratio of actuator input signal to flow rate for precise, repeatable control
• Control ratio of 25:1 — wide turndown for modulating burner applications
• Compatible with both gas and air service in a single valve body design
• Pairs with IC 20 or IC 40 actuator for full control; IC 30 also mountable
• Aluminum body construction with HNBR/NBR seals for durability
• Leakage rating of less than 2% of kVS value
• Rp internal thread connections (ISO 7-1) for straightforward installation
• EU certified (GAR 2016/426) and UKCA approved (BS EN 13611)
• Eurasian Customs Union (EAC) approval for broader market coverage

Technical Specifications

• Size: DN 10 to DN 25 (Size 1)
• Connection type: Rp internal thread per ISO 7-1
• Maximum inlet pressure (pu): 500 mbar
• Control ratio: 25:1
• Flow characteristic: linear relationship between angle and flow rate
• Leakage rating: <2% of kVS value
• Body material: Aluminum
• Restricting cylinder material: POM/Aluminum
• Control cylinder material: Aluminum
• Seal material: HNBR/NBR
• Compatible actuators: IC 20, IC 40 (full control); IC 30 (mountable)
• Suitable media: Natural Gas, LPG (gaseous), Biogas (≤ 0.1% H₂S), Clean Air
• Ambient temperature range: -20°C to +60°C
• Storage/transport temperature: -20°C to +40°C
• Installation orientation: vertical or horizontal; not upside-down (IC 20/IC 40)
• Maintenance interval: annual functional check; twice yearly for biologically produced methane
• Approvals: EU GAR 2016/426, UKCA BS EN 13611, Eurasian Customs Union

Applications

• Continuously regulated (modulating) burner combustion systems
• Gas flow rate adjustment and regulation
• Combustion air flow rate adjustment and regulation
• Industrial and commercial burner systems requiring precise ratio control
• Systems using natural gas, LPG, biogas, or clean air as media

Models / Configurations

• VFC110 – DN 10, Rp internal thread, Size 1 linear flow control body
• VFC115 – DN 15, Rp internal thread, Size 1 linear flow control body
• VFC120 – DN 20, Rp internal thread, Size 1 linear flow control body
• VFC125 – DN 25, Rp internal thread, Size 1 linear flow control body
• IFC 110, 115, 120, 125, 340, 350, 365 – IFC series sizes for integrated flow control configurations
• VFC body paired with IC 20 or IC 40 actuator to form complete assembly; IC 30 also field-mountable

IFC, VFC Accessories

• IC 20 – Standard actuator for full flow control with VFC body
• IC 40 – Heavy-duty actuator for full flow control with VFC body
• IC 30 – Mountable actuator option for VFC body

Documentation