Vickers Hydrokraft PVW PFW Piston Pumps
The Vickers by Danfoss Hydrokraft PVW and PFW series are open-circuit axial piston pumps of swashplate design, built for reliable operation and long service life in industrial hydraulic systems. PVW pumps offer variable displacement; PFW pumps are the fixed-displacement equivalent. The Hydrokraft product line was previously marketed as Eaton Hydrokraft; it is now supplied under the Vickers by Danfoss brand, following Danfoss’s 2021 acquisition of Eaton’s hydraulics business.
The pumps use a robust, tension-rod housing design that increases durability and helps reduce operating noise, together with oversized shafts and bearings for extended bearing life. Rotating and pressure-loaded parts are pressure-balanced for greater efficiency and serviceability. A thru-drive option allows a second pump to be mounted from the same shaft, and individual pump sections can be paired to form combination (tandem) units.
PVW variable-displacement pumps are available in six sizes from 130 to 750 cm³/rev; PFW fixed-displacement pumps are available in four sizes from 250 to 750 cm³/rev, with the 130 and 180 sizes not offered as fixed-displacement units. Both series share a common modular design with a wide range of displacement control, mounting, shaft and port options, allowing the pump to be configured to suit a broad range of open-circuit hydraulic system requirements.
In addition to standard mineral hydraulic oils, PVW/PFW pumps are rated for use with water-glycol and phosphate ester fire-resistant fluids, subject to seal material selection. ATEX/UKEX-certified variants are also available for installation in classified hazardous areas.
Key Specifications:
| Specification | Detail |
| Technology | Axial piston, swashplate design, open-circuit |
| PVW displacement range (variable) | 130 to 750 cm³/rev (7.9 to 45.8 in³/rev) |
| PFW displacement range (fixed) | 250 to 750 cm³/rev (15.3 to 45.8 in³/rev); not available in 130 or 180 sizes |
| Models | 130, 180, 250, 360, 500, 750 (PVW); 250, 360, 500, 750 (PFW) |
| Rated pressure (100% duty cycle) | 350 bar (5,075 psi) |
| Maximum pressure (to ISO 5598:2008) | 420 bar (6,090 psi) |
| Rated speed | Up to 1800 rev/min; higher speeds available on request |
| Direction of rotation | Clockwise or counter-clockwise |
| Mounting | Flange or foot-mounted; combination (tandem) units foot-mounted only |
| Ambient temperature range | -20 to +50°C (-4 to +122°F) |
| Hydraulic fluid temperature range | -25 to +90°C (-13 to +194°F) |
| Viscosity range (continuous operation) | 10 to 75 cSt |
| Maximum permissible start viscosity | 1000 cSt |
| Fluid cleanliness | ISO 4406 18/15/13 or better |
| Hydraulic fluid | Mineral oil to DIN 51524 part 2; also compatible with water-glycol and phosphate ester fluids subject to seal material |
| Thru-drive | Available in SAE A, B or C options, enabling multiple pump installations from a single shaft |
Mass, Torque and Power by Model
| Model | Displacement (cm³/rev) | Mass (kg) | Driving torque at 350 bar, 1500 rev/min (Nm) | Power consumption at 350 bar, 1500 rev/min (kW) |
| 130 / 180 | 130 / 180 | 130 / 140 | 724 / 1002 | 113 / 157 |
| 250 | 250 | 212 | 1392 | 218 |
| 360 | 360 | 220 | 2005 | 315 |
| 500 | 500 | 340 | 2785 | 437 |
| 750 | 750 | 395 | 3481 / 4177 | 546 / 656 |
Control Options
The PVW/PFW series offers the following displacement control options. An optional maximum displacement stop, adjustable by screw between 50% and 100% of maximum displacement, is available on all control types.
DF – Pressure compensator
Standard control type. Holds system pressure constant across the flow range. The pilot-operated compensator can be set manually, hydraulically or electronically, and includes a remote port.
LR – Power control
Power consumption is held constant across a continuously adjustable power hyperbola between a minimum and maximum setting. Available with a pressure limiter option.
SP – Electrohydraulic proportional control
Displacement is set electrically via a proportional valve and servo piston acting on the swashplate, with electrical position feedback. Hysteresis is approximately 1% of end value.
ST – Electrohydraulic proportional control (closed-loop drives)
Operates without throttle losses within electrically adjustable limits, using electrical swashplate angle feedback. Requires a minimum operating pressure above 25 bar; below this the pump moves to maximum displacement automatically.
DP – Pilot-pressure proportional control
Displacement is proportional to a separate pilot pressure signal. No feedback signal is required, though an optical indicator is recommended. Hysteresis is approximately 3% of end value.
PQ – Digital PpQ controller
Electronic control of displacement, pressure and power via the ER9.x digital amplifier and controller card, with swashplate feedback. Ordered as a separate item from the pump.
ES – Electric motor control
Displacement is adjusted via a 3-phase electric servo-motor and worm-gear, with limit switch or potentiometer position feedback. Available to special order only; no pressure or power limiter option.
Downloads
The following parts manuals are available from Danfoss for service and maintenance reference:
Contact Us for further technical details and configuration options.