Seepex BN 5-12 Series, Руководство по эксплуатации и техническому обслуживанию

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The rotor and its principle of operation.
Bending test of a standard hard
chrome coating. Poor adhesion,
large parts of the coating have
come loose.
The boundary line between base
material (below) and standard
chrome coating (above) can be
clearly distinguished. When the
component is under mechanical
stress stripping of the coating
can occur.
Flat test of a ductile hard coating,
polished and completely fissure
free. The hardness of the ductile
coating is 1620 HV, that of the
basic material is 180 HV.
Bending test of a ductile hard
chrome coating. Adhesion to the
basic material is excellent, there
are no cracks.
This diagram shows the advan-
t age ous deep diffusion zone of
the ductile coating in the basic
material, which ensures outstand -
ing service life.
Rotors from seepex, as the rotating core of our pumps, are
as individual as your pumping process. Along with the vari-
ous basic geometries, it is the material qualities, the different
coatings and the surface grades that make seepex rotors what
they are: individually adapted, high-quality components for
your specific application. Moreover, all of our geometries are
interchangeable, often without changing the dimensions of
the pump. As a result, our pumps have the flexibility to adapt
for changes in your pumping process.
The optimum rotor surface
The high demands for performance, efficiency and resistance
to erosion that we place on our rotors can only be met by sur-
faces of the highest quality. State-of-the-art machining, cut-
ting and coating processes create the optimum surfaces (up to
RA 0.3) for your conveying liquid. It is possible, for instance,
to reduce surface roughness by means of various grinding and
polishing techniques that allow for the shape of the rotor.
The wear and corrosion behavior as well as the friction and
strength properties of our rotors can be specifically improved
by such treatments.
Optimum service life
Coating the rotor surfaces makes a significant difference to
the service life of the rotor, especially when it is used to con-
vey abrasive products.
The chrome-based plating we supply, which is based on the
ductile coating procedure, has definite advantages over con-
ventional hard chrome.
The electrolytic process achieves pore-free and fissure-free
hard coatings with outstanding hardness of up to 1250 HV.
Diffusion into the basic material creates an excellent bond
between the basic material and the coating, and prevents
peeling even under extreme operating conditions. This ensures
long service life for the coating and the rotor.
Key advantages
•
Optimum efficiency due to optimum surface treatment
•
Saves energy by reducing the starting and
operating torque
•
Quiet operation characteristics due to reduced
surface roughness
•
Long service life due to harmonized components,
cost savings on spare parts
seepex design Industry standard
Rotor surface, peeled
Rotor surface, ground
Ground and polished rotor
surface