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X61 HD Series

Solids Handling Pumps with Explosion-Proof Motors // Hazardous Location

X61 HD Series

Heavy-duty pumps for Class I, Division 1, Group C & D locations

Features and Benefits

Covered by US Patent Number 6,364,620.


  • Pumping stations
  • Storm water removal
  • Wastewater transfer or removal
  • Industrial wastewater
  • Food industry byproduct (horizontal discharge units)
  • Animal processing removal (horizontal discharge units)


  • Solids: 2-1/2” (63 mm) spherical capability
  • Discharge: 3” NPT vertical or 3" or 4" flanged horizontal
  • Seals – dual mechanical carbon/stationary ceramic/rotary, Buna-N elastomers
  • Construction – cast iron ASTM A-48, Class 30, 30,000# tensile strength, protected with a corrosion-resistant, baked-on epoxy powder coating
  • Balanced concentric pump housing and impeller
  • Attaching hardware – 304 stainless steel
  • O ring seals – Buna-N
  • Ductile iron impeller – two-blade, semi-open with top pump-out vanes
  • Optional:
    • Trimmed impeller
    • Vortex impeller
    • Bronze impeller
    • Silicon carbide seal(s)
    • 50’ (15 m) power and sensor cables
    • 3450 RPM high head unit (3" discharge units only)
    • Non-sparking rail systems
    • 3" (76 mm) solids capacity (4" discharge units only)


  • FM and cCSAus rated Class I, Division 1, Group C & D construction
  • Stator – Class F insulation and lead wires, Nema B design
  • Oil-filled motor housing
  • Thermal sensor
  • Finned cast iron housing for faster heat dissipation
  • Ball bearings – dual high carbon chromium steel
  • Power and sensor cable length – 25’ (8 m)

Note: Product information presented here reflects conditions at time of publication. Consult factory regarding discrepancies or inconsistencies.

Product Specifications

  • 25’ (8 m) of heavy duty power cord.
  • 25’ (8 m) of heavy duty sensor cord.
  • Specially designed splices and potted cord entry system provides strain relief and prevents wicking of liquids into the housing.
  • Lifting lug integral part of housing (orientation 90° from illustrated view).
  • Finned oil-filled, explosion-proof rated motor housing assures uniform heat distribution, lubricates bearings and conducts heat for cooler running.
  • Heavy-duty, explosion-proof rated motor features ball bearing construction. Class F motor insulation is double-dipped and baked. End connections and lead wires are Class F. At maximum load, winding temperature will not exceed 250 °F (121 °C) with motor housing not submerged.
  • Tandem seals. Carbon/rotating, ceramic/stationary, Buna-N elastomers.
  • Upper and lower high carbon chromium steel ball bearings.
  • Stainless steel shaft and hardware resists corrosion.
  • Patented moisture detection system with upper and lower probes, protecting the motor form liquid entry.
  • Thermal sensor will deactivate pump if internal motor temperature reaches 250 °F (121 °C).
  • Vent hole helps prevent air locking.
  • Balanced ductile iron two-vane, semi-open impeller with top pump-out vanes for seal protection keyed and bolted to shaft.
  • Concentric volute reduces radial loading for longer bearing and seal life.
  • 3” NPT vertical or 3" or 4" flanged horizontal discharge.
  • Entire unit protected with a corrosion-resistant, powder coated epoxy finish.
  • 2" male NPT conduit connection (3" vertical discharge units)

Technical Data


Not for use in acidic, methanol or ethyl acetate atmospheres

Selection Guide

For information on additional Zoeller® Engineered Products refer to catalog on Rail Systems, ZM1347; Control panels ZM1342; Float Switch Brackets and Pump Lifting Cables ZM1328; Check Valves and Piping Accessories ZM1348.

Pump Performance Curves

Design Tools