CURVE
ENGINE OVERVIEW


CURVE
HEADER

Curve RPM
- Shows the curve plot RPM under normal
operational conditions.
Mat RPM -
Shows the rpm limits for materials selected and
corresponding curve legend.
Mech RPM -
Shows the rpm limits for mechanical components
i.e. bearing frame and corresponding curve
legend.
Duty RPM -
Shows the rpm for duty point plot. This rpm
should at all times be below Material and
Mechanical rpm limits.
TDH Water -
System curve for water performance.
TDH Slurry -
System curve for slurry performance.
Duty Point -
Intersect between system curve and pump
performance.
Set Velocity -
The calculated settling velocity for the slurry
being pumped. Please check with Slurrytech if
duty flow falls below this.
NPSHr - The
plotted Net Positive Suction Head Required for
the pump size selected.
Impeller -
Shows either the Slurrytech or oem part number.
Impeller Style
- Shows the style of impeller design.
Impeller Passage -
Shows the Minimum through vane diameter, max
particle diameter is normally 2/3's of this
passage.
Impeller Vanes
- The number of vanes on the impeller design.
Imp. Dia. -
Shows impeller diameter and % of maximum.
Our Pump -
Slurrytech pump model designation.
OEM Pump - OEM
equivalent pump designation.
Frame -
Bearing frame.
kW - Bearing
frame kW rating.
Pump Seal -
Sealing arrangement for the pump.
Liners -
Materials of construction for
liners.
CURVE BODY
OVERVIEW

The Curve Body
displays a graphical representation all
performance criteria applicable to Pump, System
and Process data.
The Curve Body
also includes a Performance Summary table of key
pump information and process data.
USER INTERFACE CONTROLS
Check Boxes

Allow for curve
efficiency to be corrected for front or rear
vane filling of impeller. Can also be selected
where necessary when pump is being fitted with a
mechanical seal
Drop Down
Boxes

Allows for
selection of impeller / curve / pump size.

Allows user to
set display units for performance curve. Note:
does not convert input units.
Scroll Bars

Scroll bars
control process and system design variables.
Changes made to
system and process scroll bars are immediately
calculated and reflected in the duty point and
system resistance curve. This gives the user the
unprecedented capacity to view in real time how
changes to inputs will effect system and pump
performance and interaction.
Users can
nominate the degree of wear in the piping
system. Facilitates redundancy in system designs
to account for performance reduction with wear.
Cw% - Scroll
range 0 - 65% concentration of solids by weight.
Ss - Scroll
range 1 - 8 for specific gravity of solids
phase.
Pipe ID - Scroll
range 0 - 600mm for pipe ID.
d50 - Scroll
range 20 - 3000 micron for solids d50 particle
size.
Sl - Scroll range
0.9 - 1.2 for specific gravity of liquid phase.
Len - Discharge
pipe length. Scroll
range 0 - 3000 metres of pipe length.
Toggle Buttons

Allows user to
modify flow and head entries from within the
curve body.
ADDITIONAL
DISPLAYS
Power
Graphs

Allows user to
see the pump power and torque plotted against
the available from the nominated driver size.
Velocity
Profiles

Allows user to
see velocities plotted in both graphical and
design profiles. Assists with ensuring operation
within constraints.
DATA ENTRY
FIELDS
All Data Entry
Fields are recognised by their white background.
Greyed out sections are for calculated data.

The Process Data
section allows the user to enter the specific
duty flow as well as temperature and elevation.

System Data
allows the user to expand on the basic pipe
diameter and length inputs from scroll bars. It
also facilitates the entry of intake and
discharge static heads as well as terminal or
discharge pressure if required (cyclones etc.).
The user can also
change the pipe material in this area through
drop down boxes for both intake and discharge.
The program will automatically modify the pipe
roughness factor for the different materials
used.
A summary of
Total Dynamic Head is given in this section
along with a duty summary.

Calculated Data
displays a summary of all critical calculated
data for user review.
Warning data is
normally displayed in red.

Pump Selection
Data is returned from performance curve entries
and duty point parameters.
Power is
calculated based on curve efficiency, seal
selection, drive loss and VSD factors. A minimum
motor size factor of 1.2 on calculated kW is
recommended.
Drive costs
should also be examined in further detail
through the link to our Leverlink Drive Cost
Analysis. This analysis will allow you to
identify the true cost of belt driving and will
recommend the best technology available to
reduce these costs.

The Check Boxes
in Assumed Data have no function other than to
advise the client of assumptions made in the
calculation and selection process.