Bare Shaft Pumps

Advanced Pressure Systems has enhanced the power end from its Aqua-Dyne affiliate, a proven design already, by upgrading the power frame and cross heads to a much stronger material, ductile iron. Also, now our bare shaft pumps feature a crankshaft machined from billet and are drilled for forced lubrication.

We will offer two models, the APS-S300-15 and the APS-S300-20, capable of handling pressures to 15,000 and 20,000 psi respectively. Both bare shaft pumps feature hinged manifolds for easy access to the quick change valve cartridges, plungers and stuffing boxes.


  • Rated to 300 HP
  • Flow rates: 48 GPM @ 9,000 psi / 26 GPM @ 15,000 psi / 20 GPM @ 20,000 psi
  • Crankshaft machined from billet, with induction hardened journals
  • Forced lubrication for crankshaft
  • High strength ductile iron power frame
  • Hinged cover to pump well
  • Quick change convertible manifolds from 15,000 to 20,000 psi
  • Hinged trunnion assembly for swing down manifold
  • Quick change cartridge assembly for suction and discharge valves