SQP421 SQP431 SQP432 Double Vane Pump | Vickers Tokimec Replacement

Genlu Hydraulic proudly introduces our SQP Series (SQP421 / SQP431 / SQP432) industrial-grade, ultra-low-noise double and multiple intravane hydraulic pumps. Engineered specifically for computer numerical control (CNC) machining centers, high-tonnage plastic injection molders, die-casting machinery, shearing presses, and heavy industrial power units (HPUs) where stringent acoustic emissions and synchronized, multi-circuit differential fluid delivery are paramount. This series delivers a precision-engineered, drop-in replacement for the industry-classic SQP fixed displacement vane architectures originally introduced by Vickers (Eaton) and specialized under license by Tokimec (Tokyo Keiki). We specialize in cross-referencing and supplying heavy-duty configured designations, notably the SQP432-50-25-12VQ-86DAB and SQP421-50-17-8-86-BBB-18-S111 matrix layouts, alongside a complete platform of premium replaceable cartridge kits.

In complex industrial multi-actuator systems—such as rapid-traverse to high-pressure clamping operations—multi-stage pumps deploy a large-volume pump coupled with smaller high-pressure segments to optimize power consumption. Genlu’s SQP series conforms strictly to international standard industrial footprints. We guarantee 100% Drop-in Interchangeability across standard SAE 2-bolt or 4-bolt pilot options, industrial drive shafts (parallel keyed, heavy-duty reinforced keyed, or SAE involute splines), SAE split-flange porting geometries, and independent multi-angle housing orientation adjustments. Prior to facility clearance, every SQP pump setup undergoes 100% simulated differential multi-pressure circuit shock trials, rated-RPM sound-spectrum acoustic auditing, and high-pressure cross-cartridge volumetric leakage retention verification, securing quiet running behavior and high mechanical durability.

Technical Specifications 

• Product Line: SQP Series Industrial Low-Noise Fixed Displacement Double/Triple Intravane Hydraulic Pump

• Core Covered Designation Formats:

  • SQP432-50-25-12VQ-86DAB (Triple-cartridge array: P1=50 GPM, P2=25 GPM, P3=12 GPM, Code 86 Heavy Shaft, Position D)

  • SQP421-50-17-8-86-BBB-18-S111 (Multi-stage configured build setup, 50/17/8 GPM output configuration)

• Delivery Flow Displacement Matrix (@ 1200 rpm, 0.7 MPa / 100 psi):

  • Size 4 Primary Cartridge (P1 Frame): Selectable 42, 50, 60 GPM (Standalone flow range approx. 136.0 to 193.0 $cc/rev$)

  • Size 3 Intermediate Cartridge (P2 Frame): Selectable 25, 30, 35, 38 GPM (Standalone flow range approx. 81.0 to 121.0 $cc/rev$)

  • Size 2 / Size 1 Tail Cartridge (P3 Frame): Selectable 12, 14, 17, 21 GPM or 2, 5, 8, 11 GPM frames

• Maximum Continuous Working Pressure Boundaries:

  • Large Frame Segment (Size 4 Side): Max 17.2 MPa (172 bar / 2500 psi)

  • Small Frame/High Clamping Segment (Size 2/1 Side): Up to 20.7 MPa (207 bar / 3000 psi)

• Allowable Shaft Velocity Boundaries: Minimum speed 600 rpm; Maximum rated industrial speed 1800 rpm

• Fluid Delivery Class: Multi-stage combined fixed output, ideal for dual-pressure automated manifold splitting

• Drive Shaft Specification Options: Code 86 (Heavy-duty parallel keyed) / Code 1 (Standard straight parallel key) / Code 11 (SAE Involute spline)

• Outlet Port Housing Matrix Layouts: Symmetrical housing setups enabling independent 90° radial adjustments (A, B, C, or D configurations) relative to the central suction manifold

Key Technical Advantages:

• Advanced SQP Pulse-Damping Cam Profiles for Ultra-Quiet Operation: The cam ring profiles inside the cartridge kits feature a low-noise, variable-curvature geometry combined with V-shaped timing notches on the side plates. This design smooths out internal hydraulic shock as the intravanes move between the low-pressure suction and high-pressure discharge zones, keeping total operating noise levels down to 60-65 dB at full 17.2 MPa loads.

• Intravane Active Hydraulic Tracking Architecture: Utilizes an advanced dual-element vane configuration where a smaller insert vane is nested inside the main vane body. High-pressure oil is routed underneath the rotor slots, actively forcing the main vane to track the cam ring path with a controlled hydraulic balance. This configuration reduces tip friction and cam gouging, yielding high startup mechanical torque efficiency.

• Modular Multi-Cartridge Drop-in Technology for Fast Service: Multiple pump stages, like those in the SQP421, use self-contained, independent cartridge kit modules driven by a single through-shaft. If a single stage wears down due to oil contamination, that specific internal module can be replaced without changing the other sections or the main pump body, helping lower long-term spare parts costs.

• Symmetrical Hydraulic Balanced Internal Geometric Design: The inner cam ring of each cartridge stage uses a perfectly balanced elliptical profile with dual opposing suction and discharge zones. Because the resulting internal fluid pressure forces act symmetrically against the rotor, the radial hydraulic loads cancel out completely, protecting the shaft bearings from side loading and ensuring consistent geometric alignment at high speeds.

Application Areas:

• Heavy Duty Compacting & Industrial Scrap Recycling Infrastructure: Main high-flow advance and high-pressure holding systems for sheet metal scrap balers, material compactors, and heavy alligator cutting shears.

• High-Precision Machine Tools & Centralized Oil Hydraulic Stations: Primary fluid supply manifolds for CNC fixture clamping networks, heavy vertical lathe spindle lubrication, and high-response stamping presses.

• Primary Rubber & Plastics Processing Machinery: Co-axial circuit layouts for plastics injection molding units, commercial extrusion screw feeds, and multiple-die rubber vulcanization presses.

Expert Maintenance Tips:

• Follow a Strict De-Aeration Priming Protocol at Initial Startup: Because multi-stage pumps like the SQP432 have intricate internal fluid paths and handle high volumes, they must never be started under load. Loosen the relief valves on all discharge lines before turning the shaft. Jog the electric motor intermittently 3 to 5 times until air bubbles clear the central intake line and a steady fluid stream flows from the outlet ports before ramping up pressure.

• Secure Large-Diameter Intake Flanges Against Vacuum Air Ingress: The high combined flow rate of multi-stage pumps creates high velocities in the central intake line. Inspect the main suction split-flange O-rings for any micro-cracks or misalignment. Even a minor leak under vacuum can draw air into the stream, creating a harsh cavitation noise and causing premature fatigue wear on the internal cam ring surfaces.

• Manage Local Fluid Viscosity and Thermal Spikes: We recommend using high-quality anti-wear hydraulic oil conforming to ISO VG 32 or 46 standards. Because the smaller tail pump sections (such as the 12VQ or 8 GPM modules) often operate under continuous high-pressure holding or prolonged relief status, localized heat buildup can occur. Ensure your reservoir cooling system keeps continuous oil temperatures between 30°C and 55°C to prevent thin oil from degrading volumetric efficiency.