Tokio Keiki P31V-RS-11-CMC-10-J Piston Pump

The P31V-RS-11-CMC-10-J is a variable displacement axial piston pump manufactured by Tokio Keiki, featuring an integrated solenoid-controlled two-pressure compensator. This model belongs to the highly regarded P-series, known for its exceptional quietness and high efficiency. The «CMC» control allows the hydraulic system to toggle between two preset pressure levels via an electrical signal, making it an ideal choice for machinery requiring varied force stages, such as injection molding machines, hydraulic presses, and specialized industrial clamping systems.

Technical Specifications and Performance

The P31V-RS-11-CMC-10-J is engineered to deliver high flow and flexible pressure management:

• Displacement: 31.0 $cm^3/rev$.

• Maximum Operating Pressure: 21 MPa (210 bar).

• Control Type: CMC (Solenoid-operated two-pressure compensator).

• Speed Range: 600 to 1800 min⁻¹.

• Rotation: Clockwise (RS) viewed from the shaft end.

• Design Number: 10 Series.

• Fluid Compatibility: Standard petroleum-based hydraulic oils.

Key Features for Industrial Applications

Remote Pressure Switching (CMC Control)

The standout feature of the P31V-RS-11-CMC-10-J is the CMC compensator. By energizing or de-energizing the mounted solenoid valve, the pump switches between a high-pressure setting and a low-pressure standby or secondary setting. This allows for significant energy savings during «dwell» or «unloading» phases of a machine cycle without the need for complex external unloading circuits.

Enhanced Noise Reduction

Consistent with the P-series design philosophy, this pump utilizes a high-rigidity swash plate and a noise-damping housing. Even at the larger 31cc displacement, the P31V-RS-11-CMC-10-J maintains a remarkably low noise profile, ensuring that high-power hydraulic units remain compliant with modern factory noise-level standards.

High Power Density in a Compact Frame

Despite its increased flow capacity compared to the P21V series, the P31V-RS-11-CMC-10-J retains a compact installation envelope. This high power-to-weight ratio allows for the design of smaller, more efficient hydraulic power units (HPUs) that can still deliver the robust 21 MPa pressure required for heavy-duty industrial tasks.