If you have a pump in trouble, we are here to assist you. The breakdown of a pump seal can lead to more damage to the pump itself, so its important to take notice of the warning signs and not let it grow into a larger problem. Causes for failures of centrifugal pump mechanical seal. Casing bursts each time pump is started or stopped 21. Check out this post for the most common reasons mechanical seals fail. Eliminate mechanical seal failure in a crude distillation unit. Mechanical seals ensure that pumps do not leak, which can cause damage to the rest of the machine. This document is intended to clarify what to expect on mechanical seals found in colfax products. Pump vibration is caused by pump imbalance, improper alignment, operating the pump too far to the right or left of the bep best efficiency point on the performance curve, etc. In the meantime, here are a few of the most common causes of pump seal failure.
Such failure will normally occur at approximately 6month intervals regardless of the type of seal or bearing installed. Sometimes operating conditions change to become quite different from the specific conditions for which the seal was intended. Failure modes of a mechanical seal can be identified by three main causes of failure. Loud blow is heard each time pump is started or stopped 20. Introduction to failures failure of the mechanical shaft seal is the most common cause of pump downtime. This type operation can produce high levels of vibration that culminate in damage and the abbreviated functional lives of the bearings and mechanical seals. Mechanical seal failure phenomenon and analysis pump mechanical seals are available in a wide variety of models, there are five main leak points. The root causes of failure for the mechanical seals for 16 hot hydrocarbon service pumps with operating temperatures in excess of 250c are discussed here. Failure of mechanical shaft seals the knowledge link. Vibration hurts your equipment and can result in damaged seals and shortened seal life. A mechanical seal, figure 1, consists of a stationary member seat. Extend mechanical seal life fluid sealing association.
The overwhelming reason for a pump to enter the shop is because of failure of the mechanical seal or packing, yet very. Even a standby pump can have a seal failure, and a hazard associated with it we have come across many instances of seal failure or hazard due to seal failure of running pumps, especially in light hydrocarbon or high temperature hydrocarbon services, but the fire hazard due to seal failure of idle pump is a rare event and unpredictable. How to respond to mechanical seal leakage in a centrifugal pump. The purpose of a mechanical seal is to prevent leakage, but all seals. A mechanical seal is a method of containing fluid within a vessel pumps.
The shaft seal is exposed to widely varying operating conditions. The lifeline of your machine, a mechanical seal contains. The normal outcome of such an arrangement is a consistently frequent failure of the mechanical seal or bearing when packing is fitted at the end of the shaft closest to the suction source. Checklist of problems vvith centrifugal pumps and their causes. The mechanical seal is the shaft seal device of the centrifugal pump, which has the advantages of small leakage and long life.
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