Profile: Gadren Machine Company supplies bronze and stainless steel float valves and also stock stainless steel, copper and plastic floats as well as our own pressure reducing valves and vacuum relief valves. Our Knox line include air hose fittings, double bolt clamps and air shut off valves for the industrial services market. Our products are used in cooling towers and for the petroleum and chemical industries, in food processing and agriculture as well as in the plumbing and plaint maintenance trade.