HTS KS – DKR Series Butterfly Valves

Overview

The Honeywell DKR Series butterfly valves are designed for adjusting the flow rate of hot air or flue gas on gas burners and industrial thermal systems. Available in nominal sizes DN 15 to DN 500, DKR valves are prepared for direct attachment of an IC 50 actuator and support control ratios up to 1:10, with a built-in angle-of-rotation indicator for precise positioning feedback.

The DKR series is offered in multiple temperature ratings — 100°C, 350°C, 450°C, and 650°C — with body and disc materials selected to match each service condition. The IDR designation identifies pre-assembled units combining the DKR valve with an IC 50 actuator for sizes up to DN 300.

Features & Benefits

• Nominal size range DN 15 to DN 500 — fits a wide range of industrial burner and furnace applications
• Maximum allowable pressure up to 300 mbar — suitable for low-pressure hot air and flue gas service
• Four temperature classes (100°C, 350°C, 450°C, 650°C) — body and disc materials matched to operating conditions
• Prepared for IC 50 actuator attachment — enables direct mounting with axial, linkage, or linkage-plus-shock-suppressor configurations
• Control ratio up to 1:10 — provides effective modulating flow control
• Angle-of-rotation indicator — provides visual position confirmation at the valve
• Multiple end configurations — stop bar, disc clearance, free shaft end, or manual lever with angle scale
• Clamped between DIN EN 1092 PN16 flanges — no dedicated valve flanges required, simplifying installation
• IDR pre-assembled option (DN ≤ 300) — reduces field assembly time and ensures factory-verified actuator alignment

Technical Specifications

• Nominal sizes: DN 15 to DN 500
• Maximum inlet pressure: 300 mbar
• Maximum flow velocity: ≤ 30 m/s
• Kvs range: 0.11 (DN 15) to 13,700 (DN 500)
• Medium: Hot air and flue gas
• Temperature classes: 100°C, 350°C, 450°C, 650°C (model-dependent)
• Valve disc material: Stainless steel up to DN 65; heat-resistant cast iron DN 80 and above (DKR..650); steel up to DN 100; grey cast iron above DN 100 (DKR..100/350/450)
• Body material: Grey cast iron (DKR..100/350/450); heat-resistant cast iron (DKR..650)
• Drive shaft material: Stainless steel up to 450°C; steel up to 350°C
• Flange standard: DIN EN 1092 PN16 (wafer-style, clamped between flanges)
• Actuator compatibility: IC 50 (axial, linkage, or linkage + shock suppressor)
• Ambient temperature range: -20°C to +60°C
• Storage temperature range: -20°C to +40°C

Applications

• Hot air flow control on gas burners
• Flue gas flow adjustment in combustion systems
• Roller hearth kilns
• Forging furnaces
• Industrial hot-air and flue-gas duct systems
• Modulating control applications requiring ratios up to 1:10

Models / Configurations

• DKR..A – Butterfly valve with stop bar; limits disc rotation to defined open/closed positions
• DKR..D – Butterfly valve with valve disc clearance; allows disc to float for reduced seating stress
• DKR..F – Butterfly valve with free shaft end; shaft prepared for field mounting of an actuator
• DKR..H – Butterfly valve with manual lever and angle scale; for manual positioning with visual indication
• IDR – DKR valve pre-assembled with IC 50 actuator; available for DN ≤ 300; factory-aligned and ready to install

DKR Series Accessories

• IC 50 Actuator – Compatible electric actuator for DKR valves; available in axial, linkage, and linkage-plus-shock-suppressor configurations

Documentation