Copper Brazed Stainless Steel Plate Heat Exchanger Manufactured By Alfa Laval Model Number CB26-16 (Similar To Current Model CB27) 16 Plates In And Output Ports 1/2" NPT Stainless Steel Construction Completely Covered With 1/2" Foam Insulation Overall Dimensions Including Insulation: 5-1/2" Wide x 13" Long x 3" High Heat Exchanger Dimensions 12.2 Inches Long x 4.41 Inches Wide x 1.83 Inches High (Not Including Pipe Connections) Designed Max Pressure 30 Bar (435 PSI) Designed Max Temp 150 Degree Celsius (302 Degree F) Ports S1-S2 Hot Side, Ports S3-S4 Cold Side. Ports S1 & S2 Are The Deepest Ports. Hot And Cold Flow Should Be Opposite Of Each Other Used, Tested Working. Was Used With An Anti-Freeze Type Solution