Yuken 50T Series Fixed Displacement Vane Pump | 50T-30-FR 50T-36-FR 50T-23-FR | High Pressure Hydraulic Pump

The Yuken 50T Series premium industrial fixed displacement vane pumps manufactured by Chengyuan Hydraulic are low-noise fluid power components engineered to thoroughly match the technical standards of Yuken Hydraulics. This highly requested aftermarket replacement matrix covers the complete volumetric range across factory designations, including the 50T-07-FR, 50T-12-FR, 50T-14-FR, 50T-17-FR, 50T-20-FR, 50T-23-FR, 50T-30-FR (including its derived 50T-30-FR-1 build), up to the high-capacity 50T-36-FR configuration.

Operating as the reliable primary energy heart within high-speed CNC lathes, servo pressure-holding manifolds, and automated workplace clamping networks, a vane pump’s flow pulsation profile directly governs the surface finish quality of machined parts. Chengyuan guarantees 100% original-place drop-in interchangeability across all units regarding standard mounting flange pilots, bolt circle patterns, parallel/splined drive shafts, and input/output split-flange thread layouts. Every single pump housing assembly undergoes 100% full-load qualification and overpressure resistance testing on digital benchmarking stations before distribution, maintaining stable volumetric delivery under a continuous 17.2 MPa industrial loading threshold.

Technical Specifications 

• Compatible Brand: Yuken (Industrial Single Vane Pump Technology)

• Target Replacement Model Codes: 50T-07-FR, 50T-12-FR, 50T-14-FR, 50T-17-FR, 50T-20-FR, 50T-23-FR, 50T-30-FR-1, 50T-36-FR

• Volumetric Displacement Matrix ($cm^3/rev$):

  • 50T-07: 7.2 $cm^3/rev$

  • 50T-12: 12.0 $cm^3/rev$

  • 50T-14: 14.3 $cm^3/rev$

  • 50T-17: 17.2 $cm^3/rev$

  • 50T-20: 20.3 $cm^3/rev$

  • 50T-23: 23.3 $cm^3/rev$

  • 50T-30: 30.0 $cm^3/rev$

  • 50T-36: 36.1 $cm^3/rev$

• Rated Operational Pressure: 17.2 MPa (172 bar / 2500 psi)

• Maximum Peak Pressure Limit: 21.0 MPa (210 bar / 3045 psi)

• Allowable Shaft Speed Range:

  • Maximum Speed: 1,800 rpm (under rated 17.2 MPa conditions)

  • Minimum Speed: 600 rpm (mandatory threshold to generate sufficient centrifugal force to extend vanes against the stator wall)

• Rotation & Porting Indicator: FR Designation (Dictates Clockwise rotation viewed from the shaft end, with standard vertical upward/backward flange orientations)

• Drive Shaft Specification: Standard cylindrical straight keyed shaft (splined options available upon request for servo configurations)

Key Technical Advantages:

• Vane-on-Vane Pressure Balance for High Volumetric Efficiency: The internal cartridge kit implements a dual intra-vane structural setup that balances hydraulic tracking forces. Under 17.2 MPa pressures, oil routed beneath the vane tips balances contact force, minimizing friction wear against the stator ring track while keeping an optimal oil sealing barrier. This holds overall volumetric efficiency above 95% over extended intervals.

• Noise-Optimized Stating Ring Internal Cam Profiles: The internal cam track contour of the stator ring is machined using five-axis grinders to smooth the fluid acceleration curve between the suction and discharge sectors. This design minimizes oil trapping vibrations and cavitation hums, dropping average operational noise levels below 62 dB(A) at 1,500 rpm—perfect for indoor machining environments.

• Bi-Metal Lead-Bronze Wear-Resistant Side Vane Plates: The structural side plates feature a ductile iron core clad with a sintered lead-bronze alloy layer. Precision-engineered triangular relief grooves cut into the plate faces cushion the fluid discharge flow, flattening transient pressure spikes and preventing thermal scoring under severe or intermittent lubrication conditions.

• Heavy-Duty Double-Row Rigid Anti-Friction Bearing Layout: The front drive shaft assembly is supported by high-capacity deep groove or double-row cylindrical bearings fitted onto an induction-hardened shaft journal. This framework absorbs external radial loads from drive belts or misalignment couplings, maintaining shaft concentricity and protecting internal cartridge components from uneven wear.

Application Areas:

• Precision CNC Machine Tools & Metal Cutting Systems: Supplying dependable fluid power to main spindle lubrication lines, high-speed hydraulic chuck clamps, and indexing turret cross-heads.

• Light Industrial Injection Molding & Rubber Vulcanization Machinery: Primary pressure support for footwear machinery, automated blow molding machinery, and high-low tandem pump configurations.

• Automated Fixtures & Industrial Lift Platforms: Actuating position-locking pins on automated assembly lines and driving multi-stage manufacturing tilt tables.

Expert Maintenance Tips:

• Mandatory Pre-Lubrication and Minimum Speed Enforcement: Before starting up a newly installed 50T series pump, you must pre-fill the internal pumping chambers with clean hydraulic oil through the discharge port. Utilize an inching/jogging method during the first electrical start. Because this is a fixed displacement vane pump, running it below the 600 rpm minimum threshold prevents the blades from flinging out to seal the stator track, causing a loss of priming that leads to thermal scoring of the cartridge kit.

• Absolute Suction Line Air-Tightness & Cavitation Prevention: Vane mechanisms are vulnerable to air ingestion. Ensure all suction joints and flange seals are torqued down securely, and use a 100-150 mesh inlet filter that is cleaned routinely. Any atmospheric breach or filter clogging that pushes inlet vacuum past -0.03 MPa will trigger cavitation noises and score the internal cam profile of the stator.

• Rigid Oil Temperature Limits & Anti-Wear Fluid Demands: The tightly matched tolerances within the 50T series require high-quality anti-wear hydraulic oils formulated to ISO VG32 or VG46 standards. Keep continuous operating temperatures between 30°C and 50°C (never allowing the loop to surpass 60°C). Excess heat thins the protective oil film, triggering internal leakage and scoring across the side plate faces.