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Posted by Harold hydronicnetwork.net on May 26, 2002 at 11:05:07:
In Reply to: Labyrinth Seal? posted by Martinus j Carter on May 26, 2002 at 04:28:31:
: What is a Labyrinth Seal and what type of chiller uses it? Also where is it located on the chiller system?
A labyrinth is another word for a maze where people (or gases) can take a long time to get from one end to the other. As a seal, this is useful for machinery that permits some of the coolant to leak by, such as air wheels or low-pressure-difference refrigerant between two pressure zones, evaporator and condenser inside other containers sealed from the atmosphere.
In the labyrinth seal picture from the above url, the viscosity of the refrigerant determines the leakage within the tight clearances of the seal.
Rather than be constructed so as the pressure upon the seal from the reftigerant increases, the seal pressure upon the shaft increases, the labyrinth seal relies upon its initial construction and/or installation tightness to continue a separation between pressure zones, although a combination of seals can be used.
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