DOWTY BONDED SEAL FKM GP

These small two-stage pumps are common in laboratories. They need regular oil changes. When you remove the drain plug or fill plug, there is a small seal that seals the threads.

That seal is called a Dowty Bonded Seal.

A Dowty bonded seal is a special type of sealing washer. It combines two materials in one part.

• A metal outer ring: This gives the seal strength. It stops the washer from crushing or deforming when you tighten the plug.

• A rubber inner seal: This is bonded to the metal ring. The rubber squeezes against the threads and the mating surface. It creates a leak-tight seal .

Think of it like a washer and an O-ring combined into one part. It is much more reliable than a plain copper or aluminum washer.