... testing 9kgf/cm2 3.split and compact system Pressurized Compact Flat-plate solar heating system with SOLAR KEYMARK & SRCC Stainless steel inner tank, ... heater, controller, magnesium rod. Let SFF consider more for you!Flat-Plate Collector Components:1. Frame: Colored Alunimum ... chlorine ion, sea water, salt water or buck waterb) No leakage: applied for special anti-corrosion layerc) Sanitary water: ...