HTS Eclipse – RatioMatic® Burners

Overview

The Honeywell Eclipse RatioMatic® is a nozzle-mix, ratio-controlled air-heating burner engineered for direct and indirect air heating and oven applications up to 1,900°F (1,040°C). Packaged for quick installation and startup, the RatioMatic features an integral ratio regulator that automatically adjusts gas flow in proportion to combustion air pressure, a direct-drive air butterfly valve that eliminates linkage-related slippage, and a fast-mixing nozzle that delivers a clean, stable flame at all firing rates. Available in models RM0050 through RM3000, the series covers capacities from 135 to 8,000 kW (500,000 to 30,000,000 Btu/hr).

The modular design supports a wide range of configurations including vertical-down, vertical-up, and horizontal mounting orientations. Standard nozzles accept natural gas, propane, or butane, and burners can be ordered stripped or fully packaged, wired, and piped, ready to set up and start up. The RatioMatic’s simple, self-compensating design reduces start-up time and operator guesswork, making it well-suited for emission-sensitive processes requiring low NOx, CO, and aldehyde output.

Features & Benefits

• Ratio regulator with automatic air/gas compensation — Adjusts gas flow proportionally to combustion air pressure; compensates for changes in operating conditions such as dirty air filters without requiring manual gas re-adjustment
• Turndown range up to 90:1 — Wide turndown depending on burner size and chamber conditions; high-turndown option available for extended range applications
• Direct-drive air butterfly valve — Eliminates mechanical linkages that can slip or jam during operation, improving reliability and reducing maintenance
• Fast-mixing nozzle — Provides a clean, stable flame at all firing rates and releases heat into the chamber, not the oven wall
• Low emissions performance — Ideal for emission-sensitive processes due to low NOx, CO, and aldehyde output
• Multiple ignition options — Direct spark ignition standard; optional bypass start gas piping available for RM0050–RM0700 models
• Dual flame supervision options — Flame rod supported on RM0050–RM0700 (alloy or SiC combustors); UV scanner compatible with all models
• Modular construction — Can be disassembled from the rear without entering the oven or duct; quick-change spark and flame rods; optional quick-change air filter
• Flexible piping configurations — Right- or left-hand piping; BSP or NPT pipe threads available
• Multiple combustor options — Alloy tube (low temperature), silicon carbide (SiC) tube, or refractory block (high temperature) combustion chambers
• Available packaged or stripped — Can be ordered fully packaged, wired, and piped, or stripped for multi-burner manifold or high back-pressure blower applications

Technical Specifications

• Burner type: Nozzle-mix, ratio-controlled air-heating burner
• Models: RM0050, RM0075, RM0100, RM0200, RM0300, RM0400, RM0500, RM0700, RM1000, RM1250, RM1500, RM2000, RM2500, RM3000
• Capacity range: 135 to 8,000 kW (500,000 to 30,000,000 Btu/hr)
• Maximum operating temperature: 1,900°F (1,040°C)
• Fuel types: Natural gas, propane, butane
• Air/gas ratio control: Ratio regulator with impulse line
• Excess air: 10 to 15% at high fire; higher at low fire
• Combustion air requirements: Fresh (20.9% O&sub2;), clean, ≤150°F (65°C)
• Ignition type: Direct spark ignition (low fire or bypass start gas)
• Flame supervision: Flame rod (RM0050–RM0700, alloy or SiC combustors only); UV scanner (all models)
• Control motor requirements: ≤2 rpm, ≥25 in-lb torque, 90° stroke, reversible; Kromschröder IC 20 actuator or bracket for customer-supplied motor
• Burner mounting orientations: Vertical down, vertical up, horizontal
• Combustor options: Alloy tube (low temp), silicon carbide (SiC) tube, or refractory block (high temp)
• Gas pipe connections: Threaded (NPT or BSP, customer-selected)
• Valve train requirement: Main gas shut-off valve train per NFPA recommendations
• Altitude de-rating: Capacity reduced approximately 3% per 1,000 ft above sea level
• Certifications/Compliance: NFPA compliant; component approvals per applicable local codes (UL, FM, CSA — American; CE/TÜV — European)

Applications

• Dry-off and curing ovens
• Indirect air heating systems
• Food processing and baking
• Textile drying
• Annealing furnaces
• Aluminum homogenizing
• Industrial incinerators
• Emission-sensitive process heating applications

Models / Configurations

• RM0050 – Smallest model; 500,000 Btu/hr capacity range; flame rod or UV scanner; alloy or SiC combustor
• RM0075 – Compact model; flame rod or UV scanner; alloy or SiC combustor
• RM0100 – Flame rod or UV scanner; alloy or SiC combustor
• RM0200 – Flame rod or UV scanner; alloy or SiC combustor
• RM0300 – Mid-range capacity; flame rod or UV scanner; alloy, SiC, or refractory block combustor
• RM0400 – Flame rod or UV scanner; alloy, SiC, or refractory block combustor
• RM0500 – Flame rod or UV scanner; alloy, SiC, or refractory block combustor
• RM0700 – Largest model with flame rod option; UV scanner all models; alloy, SiC, or refractory block combustor
• RM1000 – Pilot ignition; UV scanner; alloy, SiC, or refractory block combustor; pilot gas valve train required
• RM1250 – Pilot ignition; UV scanner; alloy, SiC, or refractory block combustor
• RM1500 – Pilot ignition; UV scanner; alloy, SiC, or refractory block combustor
• RM2000 – High-capacity model; pilot ignition; UV scanner; alloy, SiC, or refractory block combustor
• RM2500 – High-capacity model; pilot ignition; UV scanner; alloy, SiC, or refractory block combustor
• RM3000 – Largest model; 30,000,000 Btu/hr capacity range; pilot ignition; UV scanner; alloy, SiC, or refractory block combustor

RatioMatic® Accessories

The RatioMatic® burner series supports a range of accessories and replacement components for system integration and ongoing maintenance. Refer to individual model datasheets and spare part lists for model-specific compatibility.

• Kromschröder IC 20 Actuator – Direct-mount control motor actuator for modulating the air butterfly valve; bracket also available for customer-supplied motors
• UV Scanner – Flame supervision sensor compatible with all RatioMatic models; must be compatible with the selected flame monitoring control
• Flame Rod – Quick-change flame detection sensor; compatible with RM0050–RM0700 models with alloy or SiC combustors
• Spark Plug (Igniter) – Quick-change direct spark ignition electrode
• Optional Air Filter – Inexpensive quick-change combustion air filter for the blower inlet
• Alloy Combustor Tube – Replacement combustion tube for lower-temperature applications
• Silicon Carbide (SiC) Combustor Tube – High-temperature replacement combustion tube
• Refractory Block – High-temperature combustion chamber block for RM0300–RM3000 models
• Bypass Start Gas Kit – Optional bypass start gas piping components for RM0050–RM0700 models; includes adjustable limiting orifice (ALO)
• Ratio Regulator with High-Turndown Option – Ratio regulator with internal bypass adjustment for extended turndown range

Documentation