BULK ORDERS AND LESS COMMON PRODUCTS MAY REQUIRE ADDITONAL TIME FOR SHIPMENT. CONTACT US VIA PHONE OR EMAIL TO REQUEST MORE INFORMATION ON AVAILABILITY, OR FOR MORE OPTIONS. 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 a motor or mechanically driven butterfly valve. Features: No External Mechanical Activation required MR Valve (only) performs dual function of modulation and pressure regulation. Provides infinite, continuous flame adjustment. May be factory installed or added in the field. Capacities to 30,000 CFH. Available in a wide range of body styles and pipe sizes. Designed for use with the Maxitrol Selectra® series of modulation systems - or SC11 Signal Conditioners convert computer/PLC controller signals if standard Maxitrol companion controls are not specified. Available Options: M511 ¾” NPT: Max. Current Draw: 0.5 (amps) Application: Direct Fired (Negative Pressure) Burners Function: Increase in voltage corresponds to increase in outlet pressure CSA Tested* Inlet Pressure: 1/2 psi (3.4 kPa) Inlet Pressure Operating Limits: Upstream pressure regulator setting Upstream Pressure Regulator Required: Yes Maximum Emergency Exposure: 2.5 psi (17 kPa) Output Control Means Standard Factory Setting (if applicable): Low Fire: adjustable orifice bypass High Fire: upstream pressure regulator setting less pressure drop NOTE: 7” w.c. (1.7 kPa) max outlet pressure System Used With: Series 14, 24, 44, 94, SC11, DFM M611 3/4" or 1" NPT: Max. Current Draw: 0.6 (amps) Application: Direct Fired (Negative Pressure) Burners Function: Increase in voltage corresponds to increase in outlet pressure CSA Tested* Inlet Pressure: 1/2 psi (3.4 kPa) Inlet Pressure Operating Limits: Upstream pressure regulator setting Upstream Pressure Regulator Required: Yes Maximum Emergency Exposure: 2.5 psi (17 kPa) Output Control Means Standard Factory Setting (if applicable): Low Fire: adjustable orifice bypass High Fire: upstream pressure regulator setting less pressure drop NOTE: 7” w.c. (1.7 kPa) max outlet pressure System Used With: Series 14, 24, 44, 94, SC11, DFM MR212D 1-1/4" or 1-1/2" NPT, MR212E 1-1/2" or 2" NPT: Max. Current Draw: 0.4 (amps) Application: Direct Fired (Negative Pressure) Burners Function: Increase in voltage corresponds to increase in outlet pressure CSA Tested* Inlet Pressure: 5 psi (34 kPa) Inlet Pressure Operating Limits: 5 psi (34 kPa) Upstream Pressure Regulator Required: No Maximum Emergency Exposure: 12.5 psi (86 kPa) Output Control Means Standard Factory Setting (if applicable): Low fire: adjustable orifice bypass High fire: spring adjustment High Fire Setting: Std. model: 2 -5” w.c. (0.50-1.25 kPa) “-2” model: 2” - 5” w.c. (0.50-1.25 kPa) reduced to 0-3” w.c. (0-0.75 kPa) System Used With: Series 14, 24, 44, 94, SC11, DFM Resources: M/MR Modulating Valve Technical Literature Capacity Table: Click to Enlarge
