Blackmer is currently the
only pump company that manufactures a centrifugal pump
designed for total system reliability. The robust
construction and innovative design features make the
System One a superior product for US Navy vessels.
Developed with a leading
manufacturer of mechanical seals, System One was aware
of the common pump problems that contributed to
premature seal failures. These problem areas of pump
design (that had been ignored by the pump manufacturers
for years) were addressed in the design of the System
One pump
As a result, the System
One pump was the first standard process pump designed
for use with mechanical seals and offers state of the
art technology in design and construction.
The actual design focused
on the two most common areas of failure - seals and
bearings. By creating a better environment for both the
seal and bearings, the reliability of the pump was
improved dramatically.
The low stiffness
ratio design is the key concept that provides a superior
environment for the seals and bearings. This innovative
feature is unique to System One and offers the following
advantages for shock and demanding shipboard
applications:
Less actual shaft
deflection at the mechanical seal area allowing the
seal to run with less movement
Less shaft runout and
whip due to shorter overhang
Less vibration
Reduced loads on the
bearings due to a shorter fulcrum which
results in bearing life improvement of 2x on the
radial and 4x on the
thrust bearing (life varies inversely as the cube of
the applied load)
Greatest window of
operation (% of flow off the BEP) as compared to any
other pump.
Alignment has always
been a problem for centrifugal pumps and causes a
significant amount of bearing and seal failures due to
extraneous loads and vibration. The System One Pump
addressed this issue with the C Frame adapter which
allows for instantaneous and repeatable alignment on all
pumps.
Ease of maintenance on
ship board where the C Frame offers fast pump
replacement without the excess time required for
coupling alignment
Modular design is more
adaptable for shipboard installation and less prone
to misalignment during high stress conditions on the
ship
The C Frame adapter
also allows the same pump to be mounted horizontally
or vertically simply by changing from oil to grease
lube
The C Frame adapter
offers advantages under high temperature operation
as there is a more even temperature gradient across
the pump and motor system
Creating a better
environment for the bearings was accomplished by the
following innovations:
- Reducing vibration by
the use of the low deflection ratio shaft and C
Frame adapter
- Reduced bearing loads
due to the shorter shaft overhang
- Improved bearing
protection by the use of labyrinth seals that offer
full protection against the intrusion of
contaminants
- Labyrinth seals
never wear out (as do lip seals) and are
required by the API 610 pump specification for
refineries
- Increased oil capacity
with finned bearing frame for greater heat
dissipation and improved lubrication
- Patented flinger
filter constantly cleans oil as pump operates
- Thrust bearing held
positively in place by a bolted retainer cover
(rather than a snap ring)
- The retainer cover
is a preferred design for shock and rugged usage
- Magnetic plugs in the
oil sump provide additional safeguard against oil
contamination
An improved
environment was created for the mechanical seal by the
design of the large bore seal chamber.
- Greater fluid volume
for improved seal lubrication due to enhanced
cleaning, cooling and flushing capability
- Elimination of
potential seal rubbing (in a stuffing box designed
for packing) during shock testing or shipboard
problems
Additional features
that benefit the pump reliability and maintenance for
shipboard applications:
Maximum parts
interchangeability with one power end and frame adapter
able to fit 8", 10" and 13" pumps (see
attached chart). System one is the only pump in the
industry that has this feature. Vertical and horizontal
pumps have fully interchangeable components
- In addition to
vertical mounting option, the System One is the only
pump that can be easily rotated to side discharge
- All impellers are of
the open type and are investment cast for true
hydraulic balance and improved efficiency
- Every impeller is
dynamically balanced as standard procedure
- Impeller adjustment is
accomplished with patented micrometer adjusting nuts
that allow for simple and precision adjustment for
maximum efficiency
- Troublesome wear
rings are not required with open impellers
- Thrust bearings in the
Frame A pumps are angular contact for greater thrust
load capability and maximum shaft rigidity with
minimal shaft movement
- This is important
on the larger pumping units to withstand the
demands of shock requirements
- Solid shaft with no
sleeve to maximize stiffness, reduce deflection, and
eliminate unnecessary runout
- Back pull-out feature
for ease of seal, impeller, and power end repair
- Self supporting power
end for ease of maintenance
- Centerline casing
mount to minimize pipe strain and maintain shaft
alignment in high temperature applications
- Reinforced
shock-resistant baseplates add rigidity to the
entire pumping system
- The System One pumps
are re-engineered commercial products that meet Mil
Spec 901D & Mil Spec-Std-167. Common replacement
parts are readily available
The Blackmer System One
Pump has set the reliability standard for process pumps
today by providing total system reliability along
with the most extensive and inclusive warranty program
available.
