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From that first dry gas seal ever manufactured
for a centrifugal compressor in 1951, Kaydon Ring
& Seal has been instrumental in developing
the dry gas seal into one of the most reliable
and maintenance free sealing solution available
today.
Dependable performance. K-DGS seals are installed
in the most demanding and critical applications
where the goals for time between overhauls is
moving towards decades, not years. K-DGS seals
deliver with unique design features and application
know-how that bring that goal within your reach.
At the heart of every dry gas seal is the lift
ramp geometry to maintain the lifting force and
separation between the rotating and stationary
seal faces. Kaydon's patented Tapered Lift Ramp
geometry causes an increased velocity of the purge
gas as it moves through the ramp, sweeping any
contamination away from the sealing faces. Other
seal designs with constant depth grooves permit
contamination to collect and reduce the lifting
force between the sealing faces, leading to eventual
face contact.
(Fig. 1a & 1b) Both designs are equally reliable,
but we find that most customers already have a
preference for one or the other. Kaydon's ramp
geometry is well suited to provide bi-directional
designs for greater interchangeability of spares
(and reduced spares inventory). Bi-directional
seals also provide for protection of the seal
during unexpected periods of reverse rotation,
such as when the discharge check valve hangs open
at shut down.
While more
expensive than materials used by others, silicon
carbide will not shatter due to rubs that may
occur during surge or upset conditions that can
occur. Silicon Carbide is used as a standard by
Kaydon for all low and medium pressure (2000 psi
and below) seal designs.
The
most common source of dry gas seal contamination
is bearing oil. Replace the labyrinth that many
compressor OEM's will provide with a K-CBS Barrier
seal to prevent bearing oil contamination. (See
K-CBS section for additional details.) Specify
the Kaydon K-DGS DRYPLEX seal package to combine
the dry gas seal and barrier seal in a single,
easy to install, cartridge assembly.
The second most common source of dry gas seal
contamination is from the process gas. Entrained
liquids or particles in the process gas will cross
the OEM supplied labyrinth and foul the dry gas
seal. Eliminate process contamination with the
K-PCS process circumferential seal. (See K-PCS
description for further details.)
Kaydon offers many dry gas seal configurations
beyond the standard tandem seal to fit the needs
of the application. Whether axial length is limited
due to rotor dynamic considerations or by the
available space in a retrofit, Kaydon has the
solution.
Don't limit the success of your dry gas seal installation
with an improperly designed support system. Allow
Kaydon to supply a custom engineered buffer gas
supply panel that will also monitor the health
and performance of the dry gas seal.
With proven experience in demanding applications
including natural gas transmission, natural gas
re-injection, propane refrigeration, hydrogen,
carbon dioxide and refinery wet gas, Kaydon seals
have demonstrated the performance reliability
you require for your next installation.
Kaydon
understands the necessity for quick response,
without cutting corners. Kaydon does not subscribe
to the "black box" approach to seal
repair. Interested in what was wrong with your
seal or what caused a particular problem? Let
Kaydon schedule a live video conference to show
you the internals of your seal, what was wrong
and discuss what the solution will be. If you
don't have video conferencing facilities available,
we will e-mail photographs within 48 hours of
our receipt of the seal. Kaydon provides this
service for all of your dry gas seals, not just
the ones we manufactured.
Need help pulling your seals for inspection or
installing your new seals in the compressor? Kaydon's
turnkey field services will provide the on-site
personnel to do the complete job.
Specify Kaydon K-DGS dry gas seals for your compressor
application for the following features:
- Tapered Lift Ramp Geometry
- Unidirectional or Bi-directional
Seals
- Silicon Carbide rotating
seal face
- Keep the dry seal dry
with DRYPLEX options, K-CBS and K-PCS add ons.
- Seal support systems to
regulate buffer supply, monitor seal health
and performance
- Experience. 50+ years of dry
gas seal history in compressor applications.
Contact Kaydon Ring & Seal
for seal upgrades, retrofits, troubleshooting
and seal repair for your existing compressor seal
installations. Our dry gas seal applications engineering
group is ready to assist you at : KDGS@Kaydon.com
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