Alfa Laval LKB53-A0 O-Ring Seal

The Alfa Laval LKB53-A0 O-Ring Seal is a replacement O-ring for the LKB53 butterfly valve, used to seal the valve housing and prevent leaks during operation. It is dimensioned with an inner diameter of 53 mm and a cross-section of 3.53 mm, with supplier listings noting an NBR (nitrile) material variant in some versions. Alfa Laval part numbers associated with this seal include 9611990396, with 22340667 appearing as a cross-reference in third‑party catalogs. Availability is shown from multiple distributors in packs of 10, providing convenient stocking for routine maintenance or service-kit refreshes. This O-ring is specific to the LKB53 size within the LKB butterfly valve family and should be installed into the corresponding groove in an LKB53 assembly, ensuring the groove surface is clean and intact to maintain proper sealing performance.