Duo-seal gp duo cone also called O-ring face seal and DO floating seal. DO floating seal consists of two separate metal seal rings and two o-rings which provide elastic compression within housing bores. Fuyote is one of the most experienced duo cone seal manufacturers in the industry with an 8000 square meter plant area. Utilizing durable materials and precise engineering, our duo cone seals offer longevity, reliability, and optimal performance in demanding environments. Please check out the duo cone seal sizes and catalog below! What Is A Duo Cone Seal? Duo Cone seals are specialized floating seals used in heavy machinery and equipment. They are mainly used to prevent the leakage of lubricants and fluids, keep damaging contamination outside, and maintain effective sealing in heavy machinery and industrial equipment operating in demanding conditions. A duo cone seal consists of two identical metal seal rings and two elastomeric o-rings. The metal seal rings of Fuyote's Duo Cone Seals are made of high-alloy cast iron, with precision-machined surfaces. These rings are designed to fit closely together when installed into a housing or a bore.