HVP-40-FA3 Yuken Variable Vane Pump 140Bar

Product Overview

The HVP-40-FA3 is a high-performance, medium-to-high pressure Variable Displacement Vane Pump engineered for industrial hydraulic systems requiring high energy efficiency and precise pressure control. Manufactured to elite industry standards, this pump offers 100% direct drop-in interchangeability with well-known brands such as Yuken, CML, and KCL in their HVP/VP series. Equipped with a built-in mechanical pressure compensating valve, it automatically reduces flow output when the system reaches the pre-set pressure, drastically minimizing relief valve heating and power loss. Prior to shipment, every HVP-40 pump undergoes rigorous 100% full-load simulated working condition testing to guarantee its flow adjustment sensitivity, volumetric efficiency, and acoustic performance meet or exceed OEM specifications. It is an exceptionally cost-effective upgrade for CNC machines and automated hydraulic power units.

Technical Specifications

• Model Number: HVP-40-FA3 (Compatible with VP-40-F-A3, HVP-40-140)

• Brand Compatibility: 100% Interchangeable with Yuken, CML, KCL standard series

• Theoretical Displacement: Approx. 22.2 ml/rev

• Maximum Output Flow: 40 L/min (at 1800 RPM)

• Pressure Adjustment Range (A3): 70 – 140 Bar (1000 – 2000 psi)

• Maximum Rated Pressure: 140 Bar (14 MPa)

• Maximum Speed: 1800 RPM

• Minimum Speed: 800 RPM

• Control Type: Pressure Compensated Variable Displacement (with external pressure and flow adjustment screws)

• Mounting Type: F – Standard Flange Mounting

• Rotation (Viewed from shaft end): Clockwise (Standard Right-hand)

• Approximate Weight: 15.0 kg

Key Technical Advantages

• Energy-Saving Pressure Compensation: The core variable control mechanism allows the cam ring to automatically shift to a near-zero eccentricity position when the system pressure reaches the set point (e.g., holding pressure phase). Output flow drops to only what is needed to compensate for internal leakage, completely eliminating relief valve losses, keeping oil temperatures low, and saving considerable electrical energy.

• 100% True Plug-and-Play Interchangeability: All critical dimensions—including the mounting flange, shaft extension, and port center distances—perfectly mirror original Japanese and Taiwanese HVP/VP specifications. Customers can perform a 1:1 direct replacement without modifying machine brackets or hydraulic plumbing.

• Ultra-Quiet Operation Design: The internal cam ring features a specialized smooth transition profile, paired with precision-machined side plate metering notches. This effectively suppresses hydraulic shock during flow adjustments, ensuring the pump maintains a low-noise profile even when operating at a continuous 140 bar, thus improving the factory floor environment.

• High Response Speed & Durability: Manufactured with wear-resistant alloy rotors and vanes, and equipped with a highly responsive heavy-duty compensation spring, the pump limits reaction times to mere milliseconds during pressure and flow shifts. Precision clearance design minimizes internal friction, significantly prolonging the pump’s service life.

Application Areas

Thanks to its outstanding variable energy-saving features and pressure-holding capabilities, the HVP-40-FA3 is widely utilized in industrial equipment requiring “rapid approach & pressure holding” cycles:

• CNC Machine Tools & Machining Centers: Supplying constant-pressure fluid for hydraulic clamping and spindle lubrication systems.

• Shoe-Making & Light Industrial Presses: The perfect prime mover for hydraulic cutting machines and sole-pressing hydraulic power stations.

• Automated Packaging Machinery: Driving miniature hydraulic cylinders on packaging lines with low noise and smooth actuation.

• Custom Hydraulic Power Units (HPU): Serving as the energy-efficient core power component for automated manufacturing and non-standard industrial equipment.

Expert Maintenance Tips

• Mandatory Independent Case Drain: The external drain port of the variable pump must be piped directly and independently back to the reservoir, terminating below the minimum oil level. Never connect the drain line to the system’s main return line. Case pressure must remain below 0.3 bar (0.03 MPa) at all times; failure to do so will instantly rupture the shaft seal.

• Pre-fill and Bleeding Before Start-up: Before initial startup, you must fill the pump casing with clean hydraulic fluid through the drain port or the highest vent plug. Never run the pump dry. Jog the electric motor briefly to ensure the system is drawing oil properly.

• Fluid Contamination Control: The variable control spool and internal vane clearances are highly sensitive to particulate contamination. Maintain oil cleanliness at ISO 4406 Class 18/16/13 (or NAS 1638 Class 8) and use high-quality ISO VG 32 or 46 anti-wear hydraulic fluid for optimal lubrication and volumetric efficiency.