Tokimec Vickers SQP Series Vane Pump SQP21 SQP31 SQP2

The heavy-duty Tokimec & Vickers Compatible SQP Series Industrial Low-Noise Vane Pumps (including highly requested high-performance configurations SQP21-14-8-86CD-18, SQP2-14-1A-18, and SQP31-32-8-86CD-18), engineered by Chengyuan Hydraulic, stand as premium fluid power solutions delivering 100% direct drop-in interchangeability within automated plastic injection systems, shoe manufacturing machinery, die-casting cells, and centralized plant Hydraulic Power Units (HPUs). Featuring standard SAE 2-bolt mounting flanges, standard cylindrical keyed shaft structures (or spline variants), and precision dimensional port centerlines, this design replicates the original Tokimec/Vickers engineering footprint. Fleet mechanics and facility maintenance engineers can execute rapid, hassle-free field replacements with zero secondary modifications to electric motor couplings or rigid line constraints.

Operating as the smooth, continuous flow core inside indoor factory liquid power systems, the SQP series is widely recognized for combining low pressure ripple with near-silent acoustic signatures. At Chengyuan, build quality is verified through empirical testing; 100% of our single and double vane pumps pass 100% rigorous dynamic simulation test bench criteria. Evaluated inside digitized diagnostic bays, each pump module is operated under cyclic pressure spikes up to nominal limits (ranging from 17.2 to 21 MPa / 172-210 bar) to map overall mechanical efficiency ($\ge 92\%$), volumetric delivery curves, and real-time noise emissions. This processing guarantees long-term, quiet performance under continuous industrial shifts.

Technical Specifications

• Product Series Classification: SQP Series High-Pressure, Low-Noise Intravane Pumps (Including SQP2 Single Pumps, alongside SQP21 and SQP31 Double Pump Groups)

• Maximum Permissible Continuous Working Pressure:

  • Primary High-Pressure Shaft End Cartridges (e.g., Sizes 14, 32): Maximum continuous operating rating up to 17.2 – 21 MPa (172 – 210 bar).

  • Secondary Cover End Cartridges (e.g., Size 8): Maximum continuous operating rating up to 17.2 MPa (172 bar).

• Permissible Operational Speed Window: Stable operation from 600 rpm up to 1800 rpm nominal.

• Mounting Flange & Shaft Configurations: Fully compliant with standard SAE 2-bolt mounting boundaries and standard cylindrical straight-keyed drives.

• System Fluid Cleanliness Thresholds: High-grade anti-wear fluid (HM mineral base); oil filtration must strictly match or exceed the ISO 4406 19/16/13 target parameters.

• Model Nomenclature Breakdown & Volumetric Parameters:

  • Part Specification: SQP21-14-8-86CD-18

    • Structural Type: SQP21 series double vane configuration (combining an SQP2 series primary shaft cartridge and an SQP1 series secondary cover cartridge).

    • Shaft End Cartridge Displacement Code 14: Rated volumetric output of 45.1 $cm^3/rev$.

    • Cover End Cartridge Displacement Code 8: Rated volumetric output of 26.6 $cm^3/rev$.

    • Rotation & Port Layout 86CD: 86 designates a standard straight-keyed shaft extension; C denotes the secondary cover-side outlet is positioned 180° opposite the primary outlet; D places the primary shaft-side outlet 90° clockwise relative to the main inlet (viewed from shaft end).

    • Design Level Code: 18 series quiet design optimization.

  • Part Specification: SQP2-14-1A-18

    • Structural Type: SQP2 series standalone single high-pressure vane pump.

    • Displacement Code 14: Volumetric output of 45.1 $cm^3/rev$.

    • Drive Shaft Code 1: Standard SAE straight-keyed shaft.

    • Port Alignment Code A: In-line alignment profile between the main suction inlet and primary pressure discharge.

    • Design Level Code: 18 series quiet design configuration.

  • Part Specification: SQP31-32-8-86CD-18

    • Structural Type: SQP31 heavy double vane configuration (combining an SQP3 primary shaft cartridge and an SQP1 secondary cover cartridge).

    • Shaft End Cartridge Displacement Code 32: Rated volumetric output of 101.6 $cm^3/rev$.

    • Cover End Cartridge Displacement Code 8: Rated volumetric output of 26.6 $cm^3/rev$.

    • Rotation & Port Layout 86CD: Right-hand (clockwise) rotation with standard multi-position port arrangement, built to service dual independent branch hydraulic systems.

Key Technical Advantages

• Low-Noise Intravane Dual-Hydraulic Balance: The cartridge interior utilizes an intravane configuration where small pin-vanes sit within the main vane slots. System high pressure is routed to the vane roots through internal passages, balancing the contact force between the vane tips and the cam ring track. This design reduces local track wear and limits full-load running decibels to under 65 dB(A).

• Axial Hydro-Floating Side Plates with Gap Compensation: The cartridge assembly includes high-tensile, precision-ground flexible side pressure plates. High-pressure oil is channeled behind these plates to automatically push them against the rotor and cam ring faces. This provides automatic axial gap compensation, sustaining a high volumetric efficiency of over 95% over extended operating hours.

• Modular Drop-In Cartridge Fast-Maintenance Architecture: A major advantage of the SQP series is the self-contained cartridge design (uniting the cam ring, rotor, vanes, plates, and seals). If the system suffers from unexpected particulate wear, service technicians can swap out the worn cartridge kit in minutes without breaking the pump-to-manifold hardlines, minimizing costly production downtime.

• Radially Balanced Cam Ring Profiles: The stator ring features a dual-eccentric cam internal profile machined on five-axis profile grinders. The rotor completes two intake and two discharge strokes per rotation, vectoring high-pressure radial forces 180° opposite each other to neutralize radial bearing loads. Consequently, the heavy-duty shaft bearings handle only driving torque, extending component service life.

Application Areas

Thanks to their stable, low-pulsation flow characteristics and quiet operation, SQP series vane pumps are widely selected for indoor industrial setups:

• Plastics, Shoe, & Rubber Manufacturing Equipment: Primary high-low pressure circuits for fast vertical/horizontal injection molders, rubber curing presses, and shoe-sole moulding machinery.

• Precision CNC Machinery & Assembly Lines: Modular machining lines, multi-station clamping manifolds, and centralized hydraulic units for CNC turning centers.

• Scrap Compacting & Shearing Machinery: Mobile scrap metal balers, industrial ceramic tile pressing plants, and dual-circuit industrial lift installations.

Expert Maintenance Tips

• Pre-Fill the Main Housing Internals Prior to Initial Start-Up: Vane pump components face severe scuffing if started dry, as centrifugal force drives the unlubricated vanes into the cam ring track. Before initial motor startup or after installing a new cartridge kit, pre-fill the pump body with clean oil through the discharge port and turn the shaft by hand. Jog the electric motor in short intervals to verify fluid suction and purge trapped air before building system pressure.

• Manage Operating Oil Temperature to Prevent Excessive Fluid Thinning: Vane pumps are sensitive to shifts in fluid viscosity. Maintain system operating temperatures strictly between 35°C and 55°C (with a hard ceiling at 60°C). Excessive heat thins the oil, leading to increased internal slip and rapid wear on the vane tips. Ensure adequate oil coolers are active.

• Eliminate Vacuum Air Ingress Along the Suction Inlets: Air ingress (cavitation) is the primary cause of harsh, high-pitched noise in vane pumps. Ensure the suction pipe includes a strainer rated at 100 mesh or lower to minimize vacuum resistance, and regularly inspect the inlet flange O-rings for structural integrity. Secure, air-tight sealing is essential to prevent oil foaming and subsequent pitting along the cam track.