How do gaskets work in an Electrical Transformer?
How do gaskets work in an Electrical Transformer?
Primarily the gasket between two flat flanges follows the 3rd law of Newton and applies equal and opposite force on the flanges in proportion to the compressive pressure on it. This reverse force by the gasket fills up any gap or undulations in the flange and thus acts as a sealant for Transformer oil inside.
A good quality gasket will perform without undergoing substantial physical changes like swelling in volume, lateral spread, compression set, and leeching in Transformer Oils.
There can be 2 types of sealing systems that are generally used in Electrical Transformers.
- Grooves are made in parts that are to be sealed and then solid rubber gaskets made of NBR or Neoprene or Viton are used in these grooves. These grooves prevent the lateral spread of the gasket during the service life of the gasket.
- In places where sealing is to be done on flat flanges, rubber cork gaskets are used. These gaskets use the intrinsic property of cork to compress itself without spreading laterally while rubber provides the required sealing property.
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