... 2)Material:ABS, PE,NR 53)Usage:Cooling tower, heat exchange INTRODUCTIONDetailsNameOKD-20Silk mouth specificationsG3/4 (DN20) ... high and low a water tank, water tower of water level automatic control, product universal adjustment function, suitable for ... resistance, wide adaptability. In the solar energy, cooling tower, environmental protection, anticorrosive, chemical industry and other areas ...