![]() ![]() Without such liquid, the mechanical seals would run dry and fail.Ĭartridge seal - When a mechanical seal is first inserted within a pump its clearances should be set. The second seal contains a barrier fluid to ensure the faces are kept clean and are lubricated preventing failure. The first seal retains the fluid within the pump as per the standard mechanical seal above. Seal quenches can use freshwater for cooling, but also barrier fluids for keeping the mechanical seal faces clean when abrasive liquids are pumped.ĭouble mechanical seal - This is where two mechanical seals are used within a pump. Seal Quench - A seal quench is where pipework is connected to a mechanical seal to allow cooling when high-temperature liquids are pumped. ![]() ![]() The seal consists of several parts involving a rotating assembly which rotates as the shaft rotates, a stationary part which is fixed and is cooled by the liquid being pumped, and a spring to ensure the seal remains compressed and most importantly airtight. Single mechanical seal - this is the most common seal type used which is a seal used to seal the pump head, ensuring the liquid is retained within the pump head and does not leak out via the back of the pump casing where entry is made via the shaft which is driven by a motor. See below for our quick reference guide as to the purpose of each seal. Have you ever wondered why there are so many variations in seal types and what each seal type is used for? ![]()
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