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Bell & Gossett BP411-20LP - 350,000 BTU/Hr Low Pressure BPX Brazed Plate Heat Exchanger - B & G type Low Pressure BPX brazed plate heat exchangers offer the highest level of thermal efficiency and durability in a compact, low cost unit. These are ideal for applications that require 150 PSIG or less. The corrugated plate design provides very high heat transfer coefficients, resulting in a more compact design. The unitfts stainless steel plates are vacuum brazed together to form a durable, integral piece. Technical Specifications:BTU/Hr: 350,000 Design Pressure: 150 PSIG (10.35 bar) Design Temperature: -40 F min, 250 F max Number of Plates: 20 Channel Plates: Stainless Steel ASTM 316L Brazing Material: Copper Weight (lbs): 7.5 Applications:Radiant Floor Heating: Boiler Side: Water 180 Degree F Supply, 160 Degree F Return, Flow: 36.1 GPM, Pressure Drop: 6.3 PSI Radiant Floor Side: Water 120 Degree F Supply, 100 Degree F Return, Flow: 35.3 GPM, Pressure Drop: 5.6 PSI