Brazed plate heat exchanger Bl20 n means number of plates Length (mm): 310 Width (mm): 76 Thickness (mm): 10+2.3n Weight (kg): 1.0+0.08n Channel volume (l): 0.018(n-2) Exchange area (m2): 0.020(n-2) Working pressure: 3.0mpa Testing pressure: 4.5mpa Working pressure: -160grc ~ 225grc