Why are multi springs used for mechanical seals?

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WHY ARE MULTI SPRINGS USED FOR MECHANICAL SEALS?
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Mechanical seals are used in centrifugal pumps
and pumps that handle high- viscosity liquids.
For example, in chemical plants, pulp and paper
industries, purification plants, breweries,
petrochemical and sugar industries, and so
on. Single Wave spring seals are designed for
bi-directional flow. They can work with abrasive
material, fuels and oils, water, highly viscous
fluids, and low- aggressive chemical substances
and liquids that contain solid particles. To
improve the design of mechanical seals, wave
springs are used. The use of mechanical seals is
to rotate the shaft against a stationary housing,
e.g., a pump.
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Multi-spring mechanical seals are unbalanced and
single-acting. They are inside mounted, and they
are independent of the direction of rotation. The
face materials can be varied. Typically, they
are ceramic, tungsten carbide, and carbon. The
metal parts can be made of stainless steel and
the secondary seal parts can be made of
elastomers or PTFE. The shaft diameters of the
seals range from 12mm to 100mm and they can
withstand the maximum pressure of 10 bar. The
temperature ranges these seals can withstand are
between -20 to 220 degrees Celsius. The rotation
speed is typically 3000 rpm. To get the optimum
output, the seals are made from the best quality
raw materials sourced from reliable sources.
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Manufacturers ensure that the best quality
control checks are performed at each stage of
production. They make seals using stringent
quality checks. Multi-spring seals are widely
used for various clean media applications. These
seals find their major use in the procession of
corrosive liquids. Due to its PTFE wedge
construction of the secondary sealing member, the
seal is applicable for various universal
services. The entire rotary part is designed
using snap rings, which makes the installation
and removal of the seal easy. As said before,
seals are extensively used in aggressive
chemicals like petroleum products and
refrigerants.
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Multi-spring mechanical seals are made as per
standard specifications, but it is possible to
manufacture bespoke seals based on user-specific
parameters. The components in the cartridge offer
the best reliability and efficiency. To provide
uniform face cooling and reduce the heat on the
faces, flushing ports are attached to
them. O-ring seal design helps to reduce scoring
on the sleeve area as well as on the shaft. The
devices ensure easy installation and less
maintenance cost and longer service life. Thus,
a mult- spring mechanical seal is an important
part of centrifugal and other pumps.
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