Vickers Tokimec SQP Series Vane Pump | SQP2 SQP43 SQP432 | Low Noise Hydraulic Pump

The SQP Series intra-vane pumps from Chengyuan Hydraulic are industrial-grade power sources fully compatible with Vickers and Tokimec (Tokyo Keiki) standards. Renowned as the “Super Quiet Pump,” this series is specifically designed for indoor industrial environments with stringent noise control requirements. By utilizing a unique “intra-vane” structure, it significantly reduces the impact force of the vanes on the stator curve. For core models like SQP2, SQP43, and the triple-pump SQP432, we employ reinforced alloy steel stators and flexible porting technology. Every pump undergoes 100% simulated full-load testing before shipment to ensure minimal sound pressure levels at high operating pressures, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: SQP Series (Single, Double, and Triple pumps)

• Flow Capacity (at 1200 rpm): 2 Gpm to 60 Gpm (e.g., codes 14, 25, 60)

• Rated Operating Pressure: 17.2 MPa (172 bar)

• Max Pressure: 21 MPa (210 bar)

• Speed Range: 600 – 1800 rpm

• Design Code: Series 18

• Control Type: Fixed Displacement (Multi-pump combinations available)

• Direction of Rotation: R (Clockwise) / L (Counter-clockwise)

• Noise Level: 63 – 73 dB(A) (Depending on model size)

Key Technical Advantages:

• Intra-vane Wear Reduction: The intra-vane mechanism provides pressure compensation inside the vane slot, reducing contact stress at the vane tips. This results in ultra-quiet operation and significantly extends the service life of the stator cam ring.

• Modular Cartridge Kit Design: The SQP series features a replaceable cartridge kit. This allows for rapid maintenance without disconnecting hydraulic lines, reducing downtime and service costs for end-users.

• Superior Noise Performance: Precision-profiled stator curves and optimized port plate venting grooves minimize fluid pulsation, preventing vibration in high-precision equipment like injection molders.

• Multi-pump Versatility: Available in single, double (SQP43), and triple (SQP432) configurations, allowing a single motor to drive multiple circuits for multi-stage flow delivery and enhanced energy efficiency.

Application Areas:

• Injection Molding Machines: Primary drive for clamping and injection units.

• Precision Machine Tools: Hydraulic power for CNC grinders and milling machines.

• Die-Casting Equipment: Auxiliary systems for aluminum/magnesium die-casting.

• Shoe-Making Machinery: Reliable pressure supply for automated production lines.

Expert Maintenance Tips:

• Alignment Precision: Due to the high precision of the SQP rotor, the alignment between the pump shaft and motor shaft must be within 0.1mm to prevent bearing wear and abnormal noise.

• Inlet Environment Check: Vane pumps are highly sensitive to cavitation. Ensure the suction filter is clean and the inlet line is airtight to prevent air ingestion, which causes “screaming” and internal damage.

• Oil Viscosity Management: Use ISO VG 32 or 46 anti-wear hydraulic oil. Excessive oil temperatures lead to viscosity drop, increasing internal leakage and accelerating vane wear.