22kw 30hp Submersible Seawater Pumps Anti Corrosive No Pollution For Clean Water Sea water submersible pump mainly drawing sea water, but seawater is corrosive medium, so we recommend stainless steel material. APK pump factory main stainless steel material for sea water have stainless steel 304, stainless steel 316, stainless steel 316l, duplex stainless steel, stainless …