YB1 Series Hydraulic Vane Pump | YB1-6.3 YB1-25 YB1-63 Medium Pressure Pump

The YB1 Series fixed displacement hydraulic vane pumps manufactured by Chengyuan Hydraulic are classic fluid power units engineered for medium-to-low pressure industrial applications. Spanning an expansive configuration range from YB1-2.5 up to YB1-125, these pumps serve as the standard power source for metal-cutting machine tools, textile processing equipment, packaging machinery, and custom standard hydraulic power packs. Characterized by low pressure pulsation, stable continuous output, and quiet acoustic signatures, our YB1 series is built to exact historical specifications for guaranteed 100% original-place interchangeability. To uphold rigid quality thresholds, every singular YB1 pump undergoes 100% simulated load testing under full rated conditions prior to dispatch, ensuring mechanical reliability and zero performance drift.

Technical Specifications :

• Core Product Series: YB1 Series Fixed Displacement Hydraulic Vane Pumps

• Models Supported: YB1-2.5 / YB1-4 / YB1-6 / YB1-6.3 / YB1-10 / YB1-12 / YB1-12.5 / YB1-16 / YB1-20 / YB1-25 / YB1-32 / YB1-63 / YB1-80 / YB1-100 / YB1-125

• Displacement Matrix: From 2.5 $cm^3/rev$ to 125.0 $cm^3/rev$ (strictly correlated per specification code)

• Rated Operating Pressure: 6.3 MPa (63 bar / ~915 psi)

• Permissible Input Speed Range: 960 rpm to 1500 rpm (optimized for 4-pole or 6-pole AC electric motors)

• Minimum Stable Velocity: 600 rpm

• Theoretical Flow Grid: Delivers a flow spectrum spanning ~3.6 L/min to 180 L/min evaluated at 1450 rpm

• Volumetric Efficiency Rating: $\ge 88\%$ to $91\%$ (evaluated under standard nominal pressure and speed limits)

• Direction of Rotation: Clockwise (Right-hand standard viewed from the shaft extension), Counter-clockwise (Left-hand customized layout available)

• Shaft & Mounting Profile: Standard straight keyed shaft paired with standard rectangular flange mounting or pipe subplate interfaces

Key Technical Advantages:

• Optimized Dual-Vane Cam Ring Camber Geometry: The interior profile of the cam ring features a micro-calculated mathematical curvature. This guarantees that the tracking vanes slide smoothly within the rotor slots without harsh shock or vibration when sealing against the stator wall, lowering structural vibration and stabilizing fluid delivery.

• Low Pulsation & Acoustic Profile: Incorporating match-ground decompression slots (trapped-oil relief geometry) within the side plate indexing zones eliminates fluid entrapment shocks. At a full operational load of 6.3 MPa, the noise index stays under 60 – 65 dB(A), making it ideal for indoor factory environments.

• Highly Robust Meehanite Cast Iron Housing: Cast from premium close-grained wear-resistant cast iron, the pump housing is thoroughly stress-relieved via heat-treatment. This prevents core dimensional shifting under continuous mechanical duty cycles, ensuring the structural alignment of the tracking zones remains unchanged over years of service.

• Self-Lubricated Sleeve Bearing Architecture: Internal hydrodynamic sleeve bearings utilize the processing medium for continuous lubrication and thermal cooling. This architecture maintains a stable fluid film under multi-shift manufacturing cycles, eliminating the risk of shaft scoring caused by boundary friction conditions.

Application Areas:

• Metal-Cutting Machine Tools: Primary power supply driving hydraulic feeds, index turrets, and chuck-clamping actuators on lathes, milling setups, and precision grinders.

• Light Industrial & Textile Rigs: Serving as the secondary low-pressure power component for paper shredders, scrap balers, and leather die-cutting machinery.

• Compact Hydraulic Power Units (HPUs): Integrated into material handling lift tables, conveyor shuttle gates, and automated factory assembly stations.

Expert Maintenance Tips:

• Rigid Control Over Fluid Viscosity & Thermal Margins: The YB1 series is highly sensitive to fluid thinning. We recommend high-grade ISO VG46 or VG32 anti-wear petroleum media, maintaining active operating temperatures strictly within $10^\circ C$ to $60^\circ C$. Excess heat reduces fluid viscosity, accelerating internal clearance bypass and preventing the system from reaching its 6.3 MPa threshold.

• Mandatory Pre-Fill Priming & Manual Rotation Protocol: Upon initial engine mating or after severe circuit overhauls, the pump chamber must be completely pre-filled with clean hydraulic oil via the outlet port. Before turning the key, manually turn the flexible motor coupling several times to verify there is no mechanical interference. Use short motor jogs to purge air pocket blocks. Never run dry.

• Suction Line Integrity & Absolute Vacuum Thresholds: Suction pipe segments must be flawlessly sealed; micro-fissures introduce air ingress that triggers cavitation noise and erodes the internal vanes. Keep the suction lift under 500 mm and verify that the inlet vacuum index does not drop below -0.02 MPa to prevent fluid starvation and premature wear.