Heavy Duty seal consists of two separate metal seal rings and two square o-rings that provide elastic compression within housing bores and it is also called square bore face seal, HDDF. Fuyote is a professional manufacturer of DF heavy duty seals with an 8000 square meter plant area. We specialize in providing high-quality DF heavy-duty metal face seals for various industry applications. Additionally, we offer OEM and ODM services. If you require heavy duty seals, please check out the chart below for detailed specifications of our heavy-duty seals, or feel free to contact us directly! What Are DF Heavy Duty Seals? DF Heavy Duty Seals, also known as DF floating seals, are specialized mechanical seals designed for robust performance in heavy-duty applications. They are constructed with two rectangular rubber rings and a metal ring. The metal ring features an L-shaped contact surface with the rubber rings. This unique design allows the seals to create a dynamic sealing system that effectively prevents fluid leakage and protects against contaminants in demanding environments.