... BoilersSPECIFICATION:1. Standard capacity: 100,150L,200L,250L,300L,400L,500L. 600L,700L,800L,1000L.2. Type of tank: Pressurized, vertical ... to 7 bar.3. The tank body: SUS304 or SUS316 stainless steel, thickness 1.0 -2.5mm4. The outer cover: Multi-color ... high-density polyurethane.6. The heat exchanger: copper coils or stainless steel.7. The auxiliary heater: 1.5 -4KW8. Preservation time: more ...