|
|
|
NIKKISO NON-SEAL® PUMP
Canned Motor Pump
Features:
No Shaft seals no leak paths.
No buffer pots to maintain.
No coupling or alignment problems.
Primary leak containment shell.
Proven bearing monitor detects bearing wear
before primary leak containment shell is
contacted by the rotor.
Dry stator design and sealed junction box
terminal plate.
Controlled bearing environment,
conservative bearing design and hydraulic
thrust balancing yield average over three
year bearing life.
|
Keep your working environment safe, neat & silent,
and save your maintenance cost.
Now Nikkiso Non-Seal Pumps are not only for special services.
Design benefits lead Non-Seal Pumps to general conventional services not only for
hazardous fluids but for water.
|
|
Safe - No Shaft Protrusion to Seal - No Seals to Leak.
Eliminates most frequent source of sudden, sometimes massive,
uncontained leakege - mechanical seals. Minimizes risk of fire and explosions, burns, immediate,
and long term health problems and prevents escape of unpleasant oders.
|
Vacuum Tight & High Pressure Resistance.
Hermetically sealed design prevents air contamination of process liquids
under vacuum conditions and easily increases static strength of whole pump motor unit even up to
11,378psig.
Also ideal to handle fluids of High Temperature, High Melting Points or Extremely Low Temperatures.
|
Stays on Line - Not in the Shop
Average bearing life of over 1 year means lower maintenance cost and less
exposure to risks associated with repair of equipment used for hazardous fluids. Proven
bearing monitor detects wear before motor is damaged.
|
Field Repairable
No shimming or clearance setting required.
Bearing replacement time usually is less than 1-1/2 hours.
Over 70% of conventional pump repairs are for seals, pump bearings and couplings
with average repair frequency of only 1 year.
|
Low Routine Maintenance
No motor bearings to lubricate or replace, no coupling alignment or
lubrication, no pump bearings to lubricate, no buffer pots to fill.
|
|
Small, Compact and Self Contained
The integral pump and motor makes efficient use of space
(about half the space required for a conventional centrifugal pump). Installation costs
are reduced with minimal foundation requirements.
|
|
Low Noise & Vibration
Totally enclosed with neither motor fans nor exposed
bearings. Typical noise levels and vibration amplitudes are 60 - 65 dB(A).
|
|
Bearings
Average bearing life of over 1 year
has been demonstrated on over 70,000 units in operation.
This means that average mean time between planned maintenance is over
1 year since the few other parts required for this single pump/motor combination
are not subject to wear in typical operation.
Requirements for long bearing life are simple. Design based on years of field experience combined with
seiection of the right type pump assures bearing environment necessary for long life.
Thrust is hydraulically balanced so that thrust bearings are normally
loaded only during start up and upset conditions.
Clean liquid to lubricate and remove heat. A slurry type which utilizes a
clean external flush for the motor has been developed for process streams which contain solid particles.
Normally clean process liquids are satisfactory for lubrication and
coolling using Basic and other types.
|
Liquid not vapor. Reverse circulation
type has been developed to maintain pressure in bearing area substantially
above suction pressure to avoid flushing of liquids having steep vapor
pressure vs. temperature curves.
Shatter proof materials. Use of shatter proof materials which do not cause
sescondary damage when momentarily run dry is adopted.
All new wear surfaces are installed by replacement of shaft sleeves and
thrust washers to establish like new surface finish and clearances.
|
|
Automatic Trust Balance
|
The hydrodynamic action of a set of fixed and variable orifices provides
automatic thrust balancing to center the shaft between thrust bearings.
This eliminates thrust bearing waer during normal operation.
Contact between the replaceable thrust washers and the thrust face of the
carbon bearings occurs only during start up and upset conditions such as
loss of suction. By controlling thrust loads at the impeller, motor cooling
flow is not affected by shaft position.
|
Building Block System
Nikkiso Non-Seal Pumps are only one is the world applying the building block system to the canned motor
Pump. Wide interchangeabilities of pump modules and motor modules are available and these modules can be
freely combined. so it is possible to minimize numbers of parts in stocks.
This also makes on site repair possible.
|
|
 
|
|
Home
