DIN11684-2 DIN11853-2 Aseptic Flange

The DIN 11864 (formerly DIN 11684 / DIN 11853) Aseptic Flange Union represents the gold standard for hygienic pipe connections in the food and beverage industry. Engineered specifically for aseptic and sterile processing, this union is designed to eliminate dead spaces, ensuring that no product residue can accumulate where bacteria might proliferate.

The assembly consists of three primary components: the Female Liner, the Male Liner, and the O-ring. Unlike conventional flange systems that use gaskets extending into the flow path, this union employs a unique geometry where the Male and Female Liners interlock. When the union is clamped together under mechanical pressure, the liners compress a precisely seated O-ring into a confined groove. This design creates a flush-fitting, crevice-free connection. As the O-ring is contained within the metal liners, it is prevented from extruding into the product stream, ensuring full contact with the medium while maintaining superior tensile strength.

Primarily used for food-grade applications, the materials are strictly compliant with FDA and EU regulations. The liners are typically manufactured from high-grade stainless steel (such as 316L) featuring a high-gloss electropolished surface finish (Ra ≤ 0.4 µm). This surface quality is critical for Clean-in-Place (CIP) and Steam-in-Place (SIP) procedures, allowing for rapid draining and complete sanitization without chemical entrapment.

The DIN 11684/DIN 11853 union is indispensable in applications where hygiene is paramount, including the transfer of milk, beer, juices, and high-purity pharmaceutical ingredients. It offers the mechanical robustness of a flange with the hygienic safety of a clamped fitting, providing leak-proof integrity under high temperatures and vibration conditions typical of modern food processing environments.