Hydraflo™ H3NC High-Head Non-Clog Pump

High-Head Hydraulically Non-Clog Submersible Pump

The Hydraflo™ H3NC high-head non-clog hydraulic submersible pump is designed for use in the toughest environments. These non-clog pumps never quit—helping to improve your bottom line.

Available for Rent

While typical bypass operations require 3 water pumps to handle the primary flow and an extra pump with only 33% redundancy, MWI developed the Hydraflo™ non-clog pump as a simpler, more robust solution. These hydraulic submersible pumps outperform other bypass pump systems and lift stations with their efficiency, cost-effectiveness, and space-saving design. Available with electric or diesel drives, one HNC 20” system with two pumps and drive units uses 50% less space than traditional bypass pump systems. The Hydraflo™ non-clog pump also has a 200% larger handling capacity for solids up to 6” and a flow of 20MGD thanks to its 200 HP engine.

To get the job done right, choose the security and efficiency of two HNC 20” non-clog pumps to handle your full plant bypass operation with 100% redundancy.

  • Hydraflo™ non-clog pumps easily handle solids 200% larger than traditional centrifugal pumps, and up to 6” spherical solids
  • High efficiency & performance – with up to 90’ TDH and 18000 GPM
  • Small footprint – total system takes up to 50% less space than conventional by-pass pump systems
  • Low-upfront & operational costs – up to 40% less energy consumed*
  • Unique pump developed by MWI for the toughest pumping jobs
  • Full sewage treatment plant bypass with 100% redundancy by using only two HNC 20” pumps
  • Reliable – runs dry indefinitely with oil-lubricated seals and bearings
  • Closed two-bladed impeller handles trash and sewage with ease
  • Available in electric or diesel drives
* as compared against standard skid mounted end suction centrifugal pumps operating at maximum lift

H3NC NON-CLOG PUMP – Performance Curve

Performance curves for each bowl size are available upon request or by visiting these pages: 



  • Flood Control
  • Industrial
  • Bypass Pumping
  • Stormwater Drainage
  • Construction Dewatering
  • Agriculture
  • Aquaculture
  • Quarries
  • 3000 Drive Unit
    – Diesel engine – 300 HP at 1800 RPM
    – Engine panel with tach, hour meter, high coolant
    temperature and low oil pressure shutdowns plus over speed
    – 100 gallon vented fuel tank with extra large filler and fuel
    – 60 gallon hydraulic fluid tank
    – Safety shutdowns for low hydraulic oil, excessive vacuum
    and high hydraulic oil temperature.
    – Equipped with an internal suction strainer, return filter, external
    sight gauge for hydraulic oil and vented hydraulic oil filler cap.
    – Hydraulic pump – Dennison Vane type
    – Weight: 9800 lbs (dry)
  • H3NC
    – Hydraulic Motor – Vane or Piston type
    – Impeller – Closed 2 bladed cast iron
    – Shaft material – 300 series stainless steel
    – Volute – Cast iron
    – Discharge – (HNC) 20″ ANSI, (H3NC) 24″ ANSI
    – Hydraulic quick disconnects – 2”Supply, 1 1/2”Return, 3/4″
    – Case Drain
    – Mechanical seal – Silicone carbide – Hydraulic-fluid bathed
    – Bearings – Hydraulic-fluid lubricated
    – 50,000 hours – Minimum life.
    – Weight – 4500 lbs
    – Coating – MoTar Standard – Epoxy optional

Solutions to Common Problems & Application Gallery

H3NC Assembly

Hydraulic Motor, Bearing Box, Diffuser Wear Ring, Impeller Wear Ring, Impeller, Intake Wear Ring, Intake, Stand
Cut away view of the H3NC assembly

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