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Warman® AH® pump

Heavy duty slurry pumps for a range of mill duties, from dirty water to the most difficult water flushed crusher services

The Warman® AH® pump is the world’s standard for the most difficult mill duties. A wide variety of impellers and shaft seals provide a perfect fit for a wide range of applications. The AH® pump provides excellent wear life while maintaining efficiency during the wear cycle providing the best total operating cost. The Warman® AH® pump, together with the Warman® MC series pump, provides a complete selection for most all duties in the mill. From cyclone feed to regrind, flotation and tailings, the Warman® AH® pump is the best choice.

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  • Size range (discharge)
    1” to 18”   
    25 mm to 450 mm
  • Capacities
    to 22,000 gpm
    to 5,000 m3/hr
  • Heads
    to 240 ft  
    to 73 m
  • Pressures
    to 300 psi
    to 2,020 kPa


  • Bearing assembly – a large diameter shaft with short overhang minimizes deflection and contributes to long bearing life. Only four through bolts are required to hold the cartridge type housing in the frame.
  • Liners – easily replaceable liners are bolted, not glued, to the casing for positive attachment and ease of maintenance. Hard metal liners are completely interchangeable with pressure molded elastomer. Elastomer seal rings back all liner joints.
  • Casing – Casing halves of cast or ductile iron with external reinforcing ribs provide high operating pressure capabilities and an extra measure of safety.
  • Impeller – front and rear shrouds have pump out vanes that reduce recirculation and seal contamination. Hard metal and molded elastomer impellers are completely interchangeable. Cast in impeller threads require no inserts or nuts. High efficiency and high head designs are also available.
  • Throatbush – wear is reduced and maintenance simplified by the use of tapered mating faces to allow positive accurate alignment during assembly and simple removal.
  • One-piece frame – a very robust one-piece frame cradles the cartridge type bearing and shaft assembly. An external impeller adjustment mechanism is provided below the bearing housing for easy adjustment of impeller clearance. 

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