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HDP 400

Hammelmann high pressure pumps are built to operate at the continuous maximum duty stated in the performance parameters. Operating pressure and flow rate determine the power and pump selection. We can offer a large number of combinations to meet specific requirements.

Bare shaft pump HDP 400

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Performance parameters

  • Power rating up to 540 hp
  • Operating pressure up to 43,500 üsig
  • Flow rate up to 340.3 gpm

  • Rod force: 47,200 lbf
  • Stroke: 3.15 inch
  • Mean piston speed at n2:
    340 r.p.m. = 3.0 feet/sec
    410 r.p.m. = 3.6 feet/sec
    490 r.p.m. = 4.3 feet/sec

  • Dimensions : 36 inch(lenght) x 25 inch (width)  x 57 inch (heigh )
  • Weight: approx. 3748 lbs

Hammelmann plunger pumps convert 93 to 98 % of the shaft power to hydraulic energy.



  • Vertical 3 cylinder design
  • Wide variety of complementary ancillaries
  • Optional: diesel unit with speed transmission

Quality and reliability

  • Stainless steel pump head free of alternating stress
  • Cross head piston bellows seal
  • Choice of application specific seal assemblies
  • Solid ceramic or tungsten carbide plungers
  • Choice of bronze or stainless steel suction chamber
  • Crank section calculation by ‘Finite element method’ ensures long working life under continuous load
  • Crankshaft supported by 2 bearings and incorporating twin helical speed reducing gears
  • Pressurised oil lubrication system with oil cooler/filter