SQP321-38-21-11 Tokyo Keiki Triple Vane Pump | 210 Bar

Product Overview:

Engineered for complex, multi-circuit industrial hydraulic systems, the SQP321-38-21-11-86DCD-18-S121 triple fixed displacement vane pump (compatible with varying port codes like 86BBB) delivers exceptionally quiet and stable fluid power. This unit features advanced intra-vane technology and precision-profiled cam rings, which neutralize pressure pulsations and minimize acoustic emissions even under extreme loads. By integrating three independent displacement cartridges onto a single, heavy-duty drive shaft, it provides a highly compact power solution that significantly reduces installation space and system complexity. Prior to dispatch, every single pump is subjected to rigorous 100% full-load simulated testing for pressure, flow consistency, and thermal stability. Machined to exact industry dimensions, it offers flawless, drop-in interchangeability with original Tokimec (Tokyo Keiki) SQP321 series pumps, making it the premier choice for upgrading large-scale injection molding machines and industrial presses.

Technical Specifications

• Model Code: SQP321-38-21-11-86DCD-18-S121 (Compatible with 86BBB and other port configurations)

• Pump Type: High-performance, low-noise triple fixed displacement vane pump

• Front Pump Displacement (P1): 121 cm³/rev (Equivalent to SQP3 series 38 US GPM cartridge)

• Middle Pump Displacement (P2): 67 cm³/rev (Equivalent to SQP2 series 21 US GPM cartridge)

• Rear Pump Displacement (P3): 35 cm³/rev (Equivalent to SQP1 series 11 US GPM cartridge)

• Max Working Pressure: 21 MPa (210 bar / 3000 psi) – Applicable across all three stages

• Max Speed: 1800 RPM

• Control Type: Triple fixed displacement (three independent outputs)

• Drive Shaft: Heavy-duty straight cylindrical shaft with parallel key (designed to handle high stacked torque)

• Direction of Rotation: Clockwise (Viewed from the shaft end, standard right-hand)

• Port Configuration: Common suction port with three independent high-pressure flange delivery ports

• Recommended Oil Viscosity: 15 – 54 cSt (Optimal operating temp: 30℃ – 50℃)

Key Technical Advantages:

• Space-Saving Triple Circuitry: Driving three independent hydraulic circuits from a single prime mover drastically reduces the footprint of the hydraulic power unit. It eliminates the need for auxiliary motors or complex splitter gearboxes, streamlining system architecture and cutting costs.

• Ultra-Low Noise Operation: The specialized intra-vane design ensures the vanes are hydraulically balanced against the cam ring. Combined with smoothly profiled metering notches, this neutralizes fluid pulsation and provides operational noise levels far below conventional gear or standard vane pumps, even at 210 bar.

• True OEM Interchangeability: Manufactured to precise original tolerances, the mounting pilots, flange bolt patterns, and internal components are 100% interchangeable with Tokimec/Tokyo Keiki SQP321 units, enabling instant plug-and-play replacement.

• Modular Cartridge Construction: The front, middle, and rear pumping elements are contained within independent, pre-assembled cartridge kits. Maintenance personnel can rapidly extract and replace any specific cartridge in minutes without unbolting the massive main housing from the piping, significantly minimizing downtime.

Application Areas:

• Plastic Injection Molding Machinery: Multi-circuit hydraulic systems managing high-flow injection, clamping, and auxiliary ejection in large-tonnage injection machines.

• Metal Forming & Press Equipment: Main and auxiliary hydraulic power units for aluminum die-casting machines, heavy-duty shearers, and deep-drawing presses.

• Industrial Machine Tools: Tooling clamps, magazine rotation, and main drive control circuits in high-precision CNC gantry machining centers.

• Custom Hydraulic Power Units (HPUs): Stationary industrial power packs requiring staged, multi-actuator synchronization from a single power source.

Expert Maintenance Tips:

• Essential Triple-Chamber Priming: Given the massive internal volume of a triple pump, all three pump cavities (front, middle, and rear) must be manually filled with clean hydraulic fluid through the highest case port before the initial start-up. Dry running will cause immediate, irreversible damage to the port plates and cam rings.

• Suction Line Cavitation Prevention: Since a single, common suction port feeds all three displacement cartridges, the combined intake flow velocity is immense. Ensure the suction line is generously sized, completely airtight, and features a suction strainer capacity of at least 2.5 to 3 times the combined maximum flow to prevent severe cavitation and acoustic issues.

• Stringent Torque Verification: Always use a heavy-duty flexible coupling and ensure concentricity alignment (TIR) between the motor and pump shafts is within 0.1 mm. Crucially, calculate the combined peak torque when all three pumps operate at maximum pressure simultaneously to ensure it does not exceed the maximum torsional yield limit of the main drive shaft.