Disc: Invested.
As the head of the company has said, the seal sale is secondary to to the flow of maintenance contracts. If the notification had told us what the number of seals were and the complexity that they are expected to solve, we would better relieved. I assume we are only supplying the mechanical seals. I got the below from an internet search:
Thermal power plants use a variety of seals, including:
Oil seals
These rubber seals prevent dirt and fluids from leaking in, and create a thin layer of oil to prevent oil from leaking past the sealing lip. They can be made from materials such as Nitrile Buna Rubber (NBR), Polyetrafluorethylene (PTFE), and silicones.
Mechanical seals
These seals are used in pumps and consist of a stationary primary element and a rotating mating element. The two elements are pressed together to minimize leakage.
Leaf seals
These seals are made up of many thin plates that are laminated to form a ring-shaped segment. When the rotor rotates, a thin film of fluid forms between the leaf and the rotor, which lifts the leaf slightly to create a non-contact seal.
Seal oil systems
These systems use radial oil films to seal the shaft exits of a generator. The seal rings are lined with low-melting Babbitt metal and supplied with pressurized seal oil to prevent hydrogen gas from escaping the generator shaft.
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