50T-26-FR Yuken Fixed Displacement Vane Pump 25.9 ml/r 7 MPa

Product Overview:

The 50T Series (including 50T-16-FR, 50T-26-FR and 50T-36-FR) is a proven fixed-displacement (quantitative) vane pump fully compatible with the original Yuken 50T series. Featuring a precision Intravane structure and hydraulic balancing, it delivers low noise, high volumetric efficiency and stable flow output. Manufactured to exact original geometric tolerances, these pumps offer true drop-in interchangeability—matching mounting flanges, shaft ends and port centers precisely—so they can replace OEM units without system modifications. Every unit undergoes 100% simulated duty-cycle testing to verify pressure retention, flow stability and noise performance, making them ideal as main pumps or high-flow sections in high-low pressure circuits.

Technical Specifications 

• Model: 50T-16-FR / 50T-26-FR / 50T-36-FR (50T Series fixed-displacement vane pump)
• Displacement: approx. 16 ml/r (50T-16); 25.9 ml/r (50T-26); 36.0 ml/r (50T-36)
• Continuous rated pressure: 7 MPa (70 bar / approx. 1020 psi)
• Peak pressure: up to approx. 9 MPa (90 bar, intermittent)
• Speed range: minimum approx. 600 rpm; maximum 1800 rpm (50T-26 and smaller), approx. 1500–1800 rpm for 50T-36 (fluid- and duty-dependent)
• Control type: fixed displacement (quantitative, no variable mechanism)
• Rotation: R = clockwise (viewed from shaft end); L optional counterclockwise
• Mounting: F = flange (standard); L = foot mounting available
• Port size: outlet approx. 3/4″, inlet approx. 1″ (threaded or flange configuration)
• Shaft diameter: standard approx. φ19.05 mm or φ22 mm (code-dependent)
• Weight: flange type approx. 9.0 kg; foot type approx. 10.5 kg
• Fluid: anti-wear hydraulic oil (ISO VG32/46), viscosity range approx. 20–400 mm²/s

Key Technical Advantages:

1. True drop-in interchangeability and precision machining: Exact match to Yuken 50T series mounting dimensions, shaft ends and port centers enables direct OEM replacement without system changes, minimizing downtime and modification costs. High-precision cam ring, rotor and vane processing ensures consistent performance.
2. High volumetric efficiency with hydraulic balancing: Pressure-balanced vanes significantly reduce cam-ring wear, delivering high volumetric efficiency and stable flow output with low internal leakage under continuous duty.
3. Low-noise and low-pulsation design: Optimized inlet geometry and vane configuration minimize oil turbulence and flow ripple, resulting in quiet operation suitable for noise-sensitive industrial environments.
4. Long-life bearings and easy maintenance: Quality bearings and wear-resistant materials extend service life; simple construction allows rapid cartridge replacement in the field, reducing total cost of ownership.

Application Areas:

Machine-tool and machining-center hydraulic power units, injection-molding and die-casting low-pressure circuits, plastic machinery, metallurgical auxiliary equipment, industrial hydraulic power packs, high-low pressure combination systems (as the high-flow section), and any fixed installation requiring stable quantitative flow.

Expert Maintenance Tips:

1. Ensure precise shaft alignment during installation (flexible coupling recommended) to avoid additional radial or axial loads that accelerate bearing wear.
2. Fully prime the pump and verify a leak-free, air-free suction line before initial start-up; use clean anti-wear hydraulic oil of NAS 9–12 cleanliness class.
3. Maintain suction and return filters regularly to prevent particle ingress that can score vanes and the cam ring; keep operating oil temperature in the 40–60°C range for optimal life.
4. When replacing the cartridge, work in a clean environment and tighten housing bolts to original torque values; for long-term storage, run the pump briefly every 3–6 months to prevent internal corrosion.