Api Collection
SEAL Systems
Pumps with mechanical seals for rotating shafts are used in many industries, from pumps and heating the house of the food industry to petrochemical plants and nuclear weapons. As a mechanical seal is a device with tears, it is maintained from time to time, it will fail eventually.
Failure of a mechanical seal is most often: a fluid leak from outside. The consequences may be different. Sometimes it is OK, a pump, until someone notices a leak. But sometimes it will result in a fire, for example, if a pump is a fuel leak.
Therefore, very often the seals and the seal is called – The staff of a shutdown problem carefully, and probably the pump for repair and to prevent or minimize leakage into the atmosphere, even if a seal failed. Well, how is this possible?
There are several possible plans to hunt, they are in the API 682 standard known.
Map 65 attached to a single mechanical seal leakage will meet in a small container, which is specialized in a drain. The reservoir is open in the taking wall. Small leak is acceptable to pass through the opening and go to empty. If the leak is large enough, the opening of a barrier to create one now, and reservoir level begins to rise, an alarm is sent to a panel.
parting line 52 for a tandem mechanical seal is a greater supply tank around February to May gallons, which is filled with sealing liquid. The liquid sealant is often mineral oil or an alcohol solution. A seal in tandem has a "stand by" outer pair of sliding surfaces, which take the pressure when the internal primary seal is leaking. But before sealing liquid is required in the state by outboard motors attached. The liquid sealant is at a certain height is usually filled with atmospheric pressure. If the primary seal reject the product will expire in the pumped fluid loop buffer, which increases the pressure and level in the tank. (This will occur naturally when the pressure in seal chamber exceeds the pressure air.) A change in pressure or level is easy to spot visually or by channel. And what is very important, either fails because the outer seal, the product was never released into the atmosphere.
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