... price; 3.CCS,DNV,LR,GL,ABS,BV,SGS.. Electric & steam water heaterTank material: Carbon steel or stainless steel 304 or 316Accessories ... : Temperature controller, ball float level controller, thermometer, safety valve, pressure gauge, block valve, pumps, etc..Tank Capacity: 300L, 500L, 800L, 1000LHeating ...