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CATALOG2nd Edition 2015 Maxitrol Company. All Rights Reserved. DRAFT 09.18.2013 2 Service and installation must be performed by a trainedexperienced service technician. All products used with combustible gas must be installed and used strictly in accordance with the instructions of the Original Equipment Manufacturer OEM and with all applicable government codes and regulations e.g. plumbing mechanical and electrical codes and practices. Maxitrol products should be installed and operated in accordance with Maxitrol Safety Warning Instructions. Maxitrol Company is NOT responsible for any errors or omissions in reliance by anyone of any information set forth in this catalog without additional reference to local requirements and applicable ordinances or codes. Other worldwide approvals and certifications available upon inquiry. C US UA.TR.012-13 DRAFT 09.18.2013 42 Pipe Sizes...................................... 38 thru 1 threaded connections with NPT or ISO7-1 threads. Housing Material.......................... SR400 SR500 SR600 aluminum. Mounting...................................... Mount in an upright position only. NOTE All Maxitrol gas pressure regulators should be installed and operated in accordance with Maxitrol Safety Warning Instructions see SELMMRSR_MI_EN.FR.ES. Certifications................................ SR400 SR500 SR600 ANSI Z21.18CSA 6.3 Gas Appliance Pressure Regulators except suffix -2 models. Gas Types...................................... Suitable for natural manufactured mixed gases liquefied petroleum gases and LP gas-air mixtures. Maximum Inlet Pressure............... CSA Certified 12 psi 3.4 kPa Maxitrol Tested 1 psi 6.9 kPa Flow Rates..................................... up to 1000 CFH 28.32 m3 h Emergency Exposure Limits........... 2.5 psi 17.2 kPa Ambient Temperature Ranges........ -40 to 175F -40 to 79C Minimum Regulation..................... SR400 SR500 5 CFH SR600 60 CFH NOTE SR400-2 SR500-2 SR600-2 models are designed primarily for LP gas applications. NOTE All models may be powered by a 24 volt AC transformer. When the coil is energized the appliance is at low fire. When the coil is de-energized it is high fire. Continuous regulation is maintained to hold the electrically set outlet pressure constant. An ideal replacement for dual manifold systems the SR Series combines gas pressure regulating and flame staging in a single unit. Applications include direct-fired heaters with two speed fans hi-lo control for outdoor heaters LP natural gas switchover and industrial processing. SR400 SR SERIES 2 Stage Design Specifications 2015 Maxitrol Company. All Rights Reserved. 2015 Maxitrol Company. All Rights Reserved. DRAFT 09.18.2013 43 Model Number Pipe Size Flow Rate - CFH m3h CSA MAX 100 2.83 200 5.66 300 8.50 400 11.33 500 14.16 600 16.99 750 21.24 1000 28.32 SR400 38 x 38 150 4.2 0.33 0.08 1.30 0.32 --- --- --- --- --- --- 12 x 12 170 4.8 0.27 0.07 1.10 0.27 --- --- --- --- --- --- SR500 12 x 12 360 10.2 0.08 0.02 0.30 0.08 0.68 0.17 1.20 0.30 --- --- --- --- 34 x 34 400 11.2 0.05 0.01 0.21 0.05 0.47 0.12 0.83 0.20 1.30 0.32 --- --- --- SR600 34 x 34 600 16.8 --- 0.09 0.02 0.20 0.05 0.36 0.09 0.56 0.14 0.81 0.20 1.25 0.31 --- 1 x 1 600 16.8 --- 0.07 0.02 0.16 0.04 0.29 0.07 0.45 0.11 0.66 0.16 1.00 0.25 1.75 0.44 NOTE Capacities expressed in CFH m3 h 0.64 sp gr gas CSA maximum capacities vary with spring range and pipe size. Please contact Maxitrol directly for CSA maximums. See pages 58-59 for Regulator Sizing Requirements and Examples. Model Available Springs SR400 Maximum 3 to 5 0.75 to 1.25 S. Steel 2.5 to 3.5 0.62 to 0.87 White 4 to 6 1 to 1.5 S. Steel 3 to 5 0.75 to 1.25 White --- Minimum 0.3 to 1.2 0.07 to 0.3 Plated 0.3 to 1.2 0.07 to 0.3 Plated 1 to 2.8 0.25 to 0.7 Blue 1 to 2.8 0.25 to 0.7 Blue 2.5 to 4 0.62 to 1 Black SR400-2 Maximum 7.5 to 12 1.87 to 3 - Blue SR500 Maximum 3 to 5 0.75 to 1.25 S. Steel 1.5 to 3.5 0.37 to 0.87 White 3.5 to 6 0.87 to 1.5 S. Steel 2 to 4.5 0.5 to 1.12 White --- Minimum 0.3 to 1.2 0.07 to 0.3 Plated 0.3 to 1.2 0.07 to 0.3 Plated 1 to 2.8 0.25 to 0.07 Plated 1 to 2.8 0.25 to 0.7 Blue --- SR500-2 Maximum 7.5 to 12 1.87 to 3 - Black SR600 Maximum 3 to 5 0.75 to 1.25 S. Steel 2.5 to 4 0.62 to 1 Plated 4 to 6 1 to 1.5 S. Steel 3 to 5.5 0.75 to 1.37 White --- Minimum 0.5 to 1.2 0.12 to 0.3 Plated 0.3 to 1.2 0.07 to 0.3 Plated 1 to 2.8 0.25 to 0.7 Plated 1 to 2.8 0.25 to 0.7 Blue --- For LP application - may be used with any minimum spring. NOTE See pages 56-57 for complete Spring Selection Chart. Capacities and Pressure Drop inches w.c. kPa Spring Selection inches w.c. kPa APPLIANCE REGULATORS C US 2015 Maxitrol Company. All Rights Reserved. DRAFT 09.18.2013 44 Model Pipe Size Vent Connection Dimensions A B C D SR400 38 12 18 NPT 12A06 vent limiting device installed. 4 102 mm 2 51 mm 2.2 56 mm 1 25 mm SR500 12 34 18 NPT 12A06 vent limiting device installed. 5.3 135 mm 3.2 81 mm 3.4 86 mm 1.2 30 mm SR600 34 1 18 NPT 12A06 vent limiting device installed. 7 178 mm 3.9 99 mm 4 102 mm 1.5 38 mm SR400 SR500 SR600 NOTE Dimensions are maximums and to be used only as an aid in designing clearance for the valve. Actual production dimensions may vary somewhat from those shown. A D SR SERIES 2 Stage Design Dimensions 2015 Maxitrol Company. All Rights Reserved. DRAFT 09.18.2013 45 1 Seal Cap 2 Adjusting Screw 3 Top Housing 4 Regulating Diaphragm 5 Stem Valve 6 Bottom Housing 7 Seal Cap Gasket 8 Stack 9 Spring 10 Diaphragm Plates 11 Balancing Diaphragm 12 Sensing Tube 13 Bottom Plate 1 2 3 5 6 4 9 10 7 8 11 12 13 NOTE Diagrams are graphical representations only and may differ from actual product. 2 Stage Design APPLIANCE REGULATORS Maxitrol Company 23555 Telegraph Rd. PO Box 2230 Southfield MI 48037-2230 GPR_MS_EN_10.2015 www.maxitrol.com 2015 Maxitrol Company All Rights Reserved