The WF series are rugged steel-body fluid couplings developed for underground and heavy-duty mining applications. Designed for shaft-to-shaft connections, they are available with or without a Delay Fill chamber (WF-DF). The hollow shaft is made of stainless steel, ensuring high durability and resistance to corrosion. These couplings are optimized for use with water, water-oil emulsions, or mineral oils — with proven performance in extreme environments. The WF series supports precise torque adjustment, reliable protection systems, and is compatible with flexible or metallic disc couplings.