CONTRAFLO ENGINEERING

Dewatering Command Center

From sump inflow to discharge point — one integrated engineering workflow.

v2.2
SYSTEM-LEVEL ENGINEERING

Design the entire mine dewatering system, not just the pump.

Calculate runoff, duty flow, TDH, HDPE selection, pump stages, NPSH, motor or engine, VFD, cable, transformer, genset, pressure profile, and equipment layout.

SUMP + MAIN PUMPBOOSTERDISCHARGE
HYDROLOGY

Rainfall & Sump Drawdown

Runoff volume, continuous inflow, target evacuation time and design flow.

HYDRAULICS

Pipe, TDH & Pressure

Hazen-Williams or Darcy-Weisbach, fittings, HGL and surge screening.

SELECTION

Pump Curve & BEP

Structured curve upload, image digitizer, system-curve intersection and comparison.

POWERTRAIN

Motor, VFD & Engine

CMG motor library, derating, cable, transformer, genset and engine sensitivity.

RECENT WORK

Saved Engineering Projects

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01

Project & Duty Basis

Identity, inflow method and required pumping duty.

02

Pipeline & Hydraulic Route

HDPE dimensions, friction method, fittings and elevation profile.

Recommended mode: the tool evaluates LESSO PE100 alternatives using velocity, friction loss, TDH, surge-pressure margin and the selected design priority. Use Manual only when a consultant has fixed the pipe size.
Fittings & Minor Losses

Elevation Profile & Bench Layout

Chainage and elevation from sump to discharge. Bench count controls the side-view simulation.

03

Fluid, Pump & Suction

Mine-water quality, suction conditions and stage philosophy.

Equipment Selection Mode

Choose how the pump package is selected

Automatic mode recommends the best Contraflo package. Manual mode lets you choose the pump, driver, motor kW and booster package yourself.

04

Powertrain & Electrical Package

Electric or engine-driven configuration and power distribution.

Calculation basisPreliminary engineering + manufacturer data library
READY

Complete the design basis

The result panel will show hydraulic performance, pipe pressure, pump stages, motor/electrical selection, NPSH, warnings and dynamic mine simulation.

CONTRAFLO MASTER + EXTERNAL CURVES

Curve Studio & Digitizer

Official Contraflo master curves are built in and selected automatically. Use this studio only to upload or digitize other brands, customer-owned pumps, or existing site pumps.

DraftUser ReviewedEngineering Verified

Structured Curve Upload

CSV / XLSX

Required columns: flow_m3h, head_m. Optional: efficiency_pct, power_kw, npshr_m.

Image / PDF Digitizer

Semi-Automatic

Load a curve image. Calibration asks for bottom-left, bottom-right and top-left plot corners.

0 points
DATABASE

Curve Library

IDBrandModelRPMImpellerPointsStatusSource
OPERATING POINT

Compare Curves Against Current System

Calculate a system first, then select uploaded curves.
BALANGAN-STYLE ANALYSIS

Duty Point Sensitivity

Head × RPM × Power
WHY THIS MATTERS

See the effect of rising head before the site condition changes.

For a fixed flow, every additional meter of head increases shaft power. This module compares engine loading, required RPM and fuel burn across scenarios, while warning when engine speed and pump speed are not directly compatible.

Pshaft = ρgQH / ηpump
RESULT

Duty Scenario Table

Run the sensitivity calculation.
VERIFIED SOURCE LIBRARY

Contraflo Pump Packages

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PROJECT DATABASE

Saved Designs & PDF Reports

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