... ,water amusement park, seawater, freshwater breed aquatics, industrial water treatment Filter shell made of fiberglass reinforced plastics, including pressure gauge, side ... Dla(inch):2.0,2.0,2.0,2.0Working pre(kgf/cm2):all 2.5Flow area(m2):550,605,700 ... .3Welght of sand(kg):500,600,650,800 GOOD SAND FILTER