O-ring, 27 x 3 mm – Viton, Part# PL20010289 – vacstellar

The O-ring is made from Viton (FKM), a high-performance material. Viton is much tougher than ordinary rubber when exposed to pump oil and operating heat. It won’t swell, crack, or degrade quickly. This means you get a reliable seal that lasts through many hours of operation, saving you time and money on frequent replacements. This specific part (Part# PL20010289 or 20010289) is used in key Leybold pump models, including the D1.6B, D4B, D8B, and S8B. These are popular pumps in many labs and workshops. Replacing worn O-rings during routine maintenance is the best way to prevent bigger problems. A simple seal swap can restore performance and protect your investment.