Page 231 of Propane and Natural Gas Equipment by National Energy Equipment, Inc.

NATIONAL TOLL FREE DIRECTORY 1-866-574-5100 I ON THE WEB www.nee.ca  MAXITROL MODULATING SYSTEMS Modulating Valves for Atmospheric, Infrared, and Direct Fired Burners Maintaining consistent temperatures is no longer a problem. The unique Modulator or Modulator/Regulator valve, the heart of the Selectra Electronic Gas Flame Modulating System, provides precise, non-fluctuating, instantaneous temperature control without requiring any motor or mechanically driven butterfly valve. Whether your needs are for problem-free stabilized area heating, elevated heating, consistent higher baking/drying temperatures or other process applications. Additional features of Maxitrols modulating valve series include that absolutely no external mechanical activation is required. The MR Valve (only) performs dual function of modulation and pressure regulation. The valve series provide infinite, continuous flame adjustment and may be factory installed or added in the field. Having capacities to 30,000 CFH, they are available in a wide range of body styles and pipe sizes. Designed for use with the Maxitrol Selectra series of modulation systems or A200/300 Signal Conditioners convert computer/PLC controller signals if standard Maxitrol companion controls are not specified, providing you the means to upgrade existing applications without the need for a complete system overhaul. SELECTRA SYSTEMS Selectra M/MR Series MR410, 510, 610, MR410H-1, 510H-1, 610H-1, M451, M551, M651 M411, 511, M420H, 520H, 620H, M420, 520, 620 M611 MR212, MR251* (* same as MR212 except single by-pass) Valve Application Function Upstream Pressure Regulator Required 0.4 (0.7 for H-1) Max Current Draw (amps) System Used With M411 M511 M611 Direct Fired (Negative Pressure) Burners Increase in voltage corresponds to increase in outlet pressure Yes 0.4 0.5 0.6 Series 14, 24, 44, 94, M, A200/300 M420(H) M520(H) M620(H) 1. Atmospheric Burners 2. H models for higher outlet pressures (such as LP applications) 0.4 (0.7 for H) 0.5 (.85 for H) 0.6 (1.0 for H) Series 94, A200/300 M451 M551 M651 Atmospheric Burners where higher outlet pressures are needed 0.4 0.5 0.6 MR251D MR251E MR251G Atmospheric Burners No 0.4 MR212D MR212E MR212G MR212J Direct Fired (Negative Pressure) Burners 0.4 Series 14, 24, 44, 94, M, A200/300 MR410(H-1) MR510(H-1) MR610(H-1) 1. Atmospheric Burners 2. H models for higher outlet pressures (such as LP applications) Decrease in voltage corresponds to increase in outlet pressure Yes 0.4 (0.7 for H-1) 0.5 (0.85 for H-1) 0.6 (1.0 for H-1) Series 20, 21, 30, 31 M MR SERIES GENERAL APPLICATION TABLE

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