There are various applicaitons of mechanical shaft seals, but the most common are centrifugal pumps, propeller shafts on ships, and industrial mixers. The common factor here is a rotating shaft, where one end is in fluid that must be sealed off from the other end. Mechanical seals typically replace packing in a chamber called a stuffing box. Packing is a resilient material. A part called a gland compresses the packing, causing it to expand against the rotating shaft and the walls of the packing chamber, sealing it off. Packing is higher maintenance than a mechanical seal, as it must be continually adjusted as it wears out. If compressed too tightly in the process of eliminating all leakage, packing can cause damage to the shaft. A mechanical seal eliminates the damage and most of the maintenance, but has the drawback of much higher cost.
No, hair is not the outer covering of a seal. Seals have a thick layer of blubber under their skin, and their outer covering is made up of a combination of thick, waterproof fur or hair. This fur helps seals regulate their body temperature and stay warm in cold water.
The outer covering of an apple is called the skin or peel.
Tonoplast is the outer covering of vacuole
Why do seeds have outer overing
They have shells to protect them from their enemies.
hair
No, hair is not the outer covering of a seal. Seals have a thick layer of blubber under their skin, and their outer covering is made up of a combination of thick, waterproof fur or hair. This fur helps seals regulate their body temperature and stay warm in cold water.
they proctect the body if is danger
what is seahorse outer-covering
The outer covering of the eyeball is cornea.
Amphibians do not have outer covering.
Bat is a mammal, so it's outer covering is hair whereas bird's outer covering is feather.
A seals outer covering is thick skin.
an ant's outer covering is their exoskeleton
Camels have hair as their outer covering.
Tonoplast is the outer covering of vacuole
The outer covering of a prawn in a shell.