Vickers Eaton PVB PFB Series Axial Piston Pump PVB5 PVB6 PVB10

The precision-engineered Vickers Eaton Compatible PVB & PFB Series Axial Piston Pumps (comprising global industrial-grade designations PVB5-RSY40-C12S30, PVB6-RSY-20CM-11, and PVB10-RSY-30-C-12), manufactured by Chengyuan Hydraulic, stand as reliable choice fluid power components optimized for 100% direct drop-in interchangeability across medium-pressure industrial hydraulic power units, automated tooling platforms, and plastics machinery. Built in complete dimensional alignment with classic Vickers engineering standards, this lineup features identical SAE mounting pilots, shaft configurations (straight keyed or standard splines), and port threads/flanges. B2B global supply networks and field technicians can execute seamless component upgrades without modifying pipeline framing or structural support brackets.

Exhibiting a robust swashplate geometry, the PVB variable-displacement and PFB fixed-displacement sub-series have earned a reputation for elevated volumetric efficiency, low acoustic signatures, and minimal maintenance overhead. At Chengyuan, all operational parameters are thoroughly validated through our 100% rigorous dynamic simulation test bench criteria. Before leaving our facility, every pump is placed under dynamic cycling up to its nominal 210 bar load limit to verify pressure compensator valve stroke sensitivity, confirm swashplate stability under sharp adjustments, monitor case-drain volume bounds, and measure operational vibration. This guarantees stable pressure tracking, zero micro-binding, and extended service intervals on complex, continuous manufacturing lines.

Technical Specifications

• Product Series Classification: PVB / PFB Series Inline Axial Piston Pumps (Industrial Trims)

• Structural Profile: Swashplate design (Inline piston-to-shaft orientation)

• Nominal Continuous Operating Pressure: 210 bar (21 MPa)

• Maximum Permissible Peak Pressure: 230 bar (23 MPa momentary line shocks)

• Recommended Fluid Cleanliness Class: Premium anti-wear mineral fluids matching ISO 4406 19/17/14 minimum criteria

• Model-Specific Nomenclature & Engineering Metrics (Catalog Verified):

  • Part Designation: PVB5-RSY40-C12S30

  • Geometric Displacement Scale: 10.5 cc/rev ($cm^3/rev$)

  • Configuration Codes: R indicates clockwise rotation (viewed from shaft extension); S denotes split-flange intake port and straight-threaded pressure port; Y designates variable displacement.

  • Technical Generation: Series 40 design topology.

  • Control Configuration C12: Standard pressure compensator module. Letter C indicates pressure regulation; code 12 specifies an adjustable cut-off pressure range typically spanning 20 to 140 bar.

  • Shaft Style S30: Dedicated keyed/splined drive modification meeting 30-sequence standards.

  • Maximum Permissible Rotational Velocity: 1800 rpm (Atmospheric inlet)

  • Net Weight: Approx 11.5 kg

  • Part Designation: PVB6-RSY-20CM-11

  • Geometric Displacement Scale: 13.8 cc/rev ($cm^3/rev$)

  • Configuration Codes: R clockwise rotation; S side-oriented port configuration; Y variable swashplate matrix.

  • Technical Generation: Series 20 legacy design profile.

  • Control Configuration CM: Low-range pressure compensator module. Calibrated with lower rate control springs for low-pressure unloading stability and optimized standby power savings.

  • Hardware Modification Suffix: Sequence 11 revision coding.

  • Maximum Permissible Rotational Velocity: 1800 rpm

  • Net Weight: Approx 14.0 kg

  • Part Designation: PVB10-RSY-30-C-12

  • Geometric Displacement Scale: 21.1 cc/rev ($cm^3/rev$)

  • Configuration Codes: R clockwise rotation; S side-ported layout; Y variable displacement core.

  • Technical Generation: Series 30 heavy-duty long-life configuration.

  • Control Configuration C: High-range standard pressure compensator, managing stable cut-off limits across full 210 bar operating boundaries.

  • Hardware Modification Suffix: Sequence 12 mechanical revision coding.

  • Maximum Permissible Rotational Velocity: 1800 rpm (Running at 1200 rpm yields low dbA noise floors)

  • Net Weight: Approx 19.5 kg

Key Technical Advantages

• Case-Hardened 9-Piston Assembly with Precision Lapping: Incorporates a balanced 9-piston rotating group. Each piston is induction-hardened and ground to a mirror-like micron finish, matching with high-density bronze-faced slippers. This layout establishes a reliable hydrostatic oil film over the swashplate face, reducing boundary friction and keeping volumetric efficiency above 94%.

• High-Sensitivity, Low-Hysteresis Pressure Compensator Valves: The control spool layout (C/CM options) responds rapidly to pressure variations. Upon hitting the factory-set cut-off pressure limit, the control piston adjusts the swashplate angle to zero-stroke displacement in milliseconds, dropping auxiliary heat generation and achieving significant power conservation.

• Vibration-Damping Cast Iron Pump Enclosure: The external pump housing is cast from high-density, stress-relieved grey cast iron. This structural choice provides excellent vibration absorption, containing structural resonance caused by inner fluid pulsations and maintaining a low ambient noise floor in compact plant environments.

• Acoustically Optimized Timing Plates with Shock Slots: Tailored for the specific volumetric dynamics of PVB5, 6, and 10 displacements, the internal timing plate embeds a series of relief shock slots. These slots smooth out the rapid pressure transition as each piston switches between the intake and exhaust chambers, eliminating high-frequency fluid hammer and pipe vibration.

Application Areas

Thanks to their flexible variable displacement controls, modest spatial envelopes, and quiet operational profiles, the PVB / PFB series is widely deployed in medium-pressure factory automation setups:

• CNC Machine Tools & Precision Machining Centers: Provides continuous, low-pulsation fluid delivery for clamping fixtures, automated indexing chucks, tool-turret indexing, and linear axis slides.

• Light Industrial Machinery & Custom Hydraulic Packages: Main hydraulic supply systems for textile handling equipment, leather embossing machinery, footwear injection molding, and modular conveyors.

• Plastics & Die-Casting Pilot Sub-circuits: Operates as the dedicated low-heat, high-responsiveness pressure source for core-pulling sequences, clamping interlocks, and pilot control circuits on major molding systems.

Expert Maintenance Tips

• Mandatory Housing Pre-Lubrication Prior to Ignition: The internal rotation group, cylinder contact faces, and swashplate saddle bearings rely entirely on fluid inside the housing for lubrication and cooling. Before the initial startup or after extended shutdowns, always remove the highest available case drain plug and fill the enclosure with clean, filtered hydraulic oil. Never start the pump dry, as this will score the slippers and valve plate.

• Rigid Filtration Controls for Long-Life Stability: Piston components are highly sensitive to microscopic suspended particulate. If oil cleanliness degrades below the ISO 4406 19/17/14 threshold, micro-abrasives will score the piston bores, increasing internal blow-by and potentially causing the compensator spool to bind. Maintain high-efficiency return-line filtration and perform routine fluid sampling.

• Keep Case Drain Line Back-Pressure Below Rated Limits: The case drain connection must be piped independently back to the reservoir, terminating below the minimum fluid line. Never couple this line with main system return pipes or route it through check-valve restrictions. Ensure static internal case pressure stays below 1.2 bar to protect the front shaft lip seals from leaking and prevent unbalancing the compensator swashplate stroke control.