YUKEN PV2R1-6, PV2R2-26 and PV2R2-35 are high-performance single-stage vane pumps independently developed by Yuken Industry Co., Ltd., a renowned Japanese hydraulic equipment manufacturer with a history of more than 70 years. As core products of the PV2R series (including PV2R1 and PV2R2 sub-series), these three pumps inherit the series’ inherent advantages of low noise, high pressure resistance, high reliability and stable performance, while differing in geometric displacement and series positioning to adapt to diverse flow and load requirements. They are widely applied in various hydraulic systems requiring precise and efficient power supply, playing a crucial role in precision machining, light industry, heavy industry, metallurgy and port machinery fields.

Product Core Parameters

YUKEN PV2R1-6 belongs to the PV2R1 sub-series (small-displacement type), while PV2R2-26 and PV2R2-35 belong to the PV2R2 sub-series (medium and large-displacement types). The three pumps share the same core structural design and performance standards, but differ significantly in geometric displacement, which determines their respective applicable scenarios. The specific parameters are detailed as follows:

• YUKEN PV2R1-6 Vane Pump: As a small-displacement model in the PV2R1 series, it has a geometric displacement of 6.0 cm³/rev (0.366 cu.in./rev). When using anti-wear petroleum base oils, the maximum operating pressure can reach 21 MPa (3050 psi), ensuring stable oil supply under light and medium load conditions. The shaft speed ranges from 600 r/min to 1800 r/min (recommended operating speed is 1200 r/min), and the volumetric efficiency is not less than 92% — a key indicator reflecting the pump’s ability to resist leakage, which effectively reduces energy loss and improves the overall efficiency of the hydraulic system. Its compact size makes it suitable for equipment with limited installation space.
• YUKEN PV2R2-26 Vane Pump: It is a medium-displacement model in the PV2R2 series, with a geometric displacement of 25.8 cm³/rev (1.574 cu.in./rev). It shares the same maximum operating pressure (21 MPa / 3050 psi for anti-wear petroleum base oils) and shaft speed range (600-1800 r/min) as the PV2R1-6. The higher displacement enables it to provide larger output flow, making it suitable for hydraulic systems that require medium flow demand under the same pressure conditions, balancing flow and energy consumption.
• YUKEN PV2R2-35 Vane Pump: As a large-displacement model in the PV2R2 series, it has a geometric displacement of 34.8 cm³/rev (2.123 cu.in./rev), the largest among the three pumps. It also features a maximum operating pressure of 21 MPa (3050 psi) and a shaft speed range of 600-1800 r/min. The large displacement allows it to deliver sufficient hydraulic flow for high-load, large-flow hydraulic systems, meeting the demand for efficient and stable operation of heavy-duty equipment.

All three pumps are compatible with a variety of hydraulic media, including anti-wear petroleum base oils, R&O type oils, water glycols and synthetic fluids, with a suitable medium temperature range of -10°C to 80°C. This wide adaptability enables them to work stably in different working environments, enhancing their applicability in diverse industrial fields.

Structural Features & Core Advantages

The three vane pumps adopt advanced structural design and high-quality materials, integrating performance, durability and adaptability, which are consistent with the overall advantages of YUKEN vane pumps. Their shared core advantages are reflected in the following aspects:

1. Low Noise Operation: All three pumps adopt an arc vane structure and a high-order equation stator curve design, which effectively optimizes pressure and flow pulsation. The operating noise is controlled below 70 dB(A), meeting the quiet environment requirements of precision equipment such as CNC machine tools and precision grinders, and improving the working environment of operators.
2. High Pressure & High Efficiency: With a maximum operating pressure of 21 MPa, they can easily adapt to high-load working scenarios. The volumetric efficiency of not less than 92% ensures stable and continuous oil supply — volumetric efficiency, which is the ratio of actual flow to theoretical flow, directly reflects the pump’s energy-saving performance and leakage resistance. This design reduces energy consumption during operation and improves the energy-saving performance and operating stability of the entire hydraulic system.
3. Long Service Life & High Reliability: The stator and vanes of the three pumps are treated with special surface hardening technology, which significantly increases their wear resistance and extends their service life by 30% compared with ordinary vane pumps. This reduces the frequency of maintenance and replacement, lowering the overall operating cost. The pump body is made of high-strength aluminum alloy material, which has good explosion-proof and heat-dissipating performance, enabling the pumps to work stably in complex and harsh working conditions such as high temperature and high pressure.
4. Easy Maintenance & Compact Structure: All three pumps adopt an integrated driving component design, which is configured as a complete kit and can be supplied as a cartridge assembly. This design facilitates quick replacement of driving parts, shortens maintenance time and reduces maintenance costs. In addition, the overall design is compact and lightweight — the PV2R1-6 is particularly small in size, while PV2R2-26 and PV2R2-35 maintain a compact structure despite their larger displacement, making them convenient for installation in limited space and improving the flexibility of equipment matching.
5. Series Differentiation & Strong Adaptability: The PV2R1-6 (small displacement) is suitable for small-flow, light-load systems; PV2R2-26 (medium displacement) adapts to medium-flow, medium-load scenarios; PV2R2-35 (large displacement) is designed for large-flow, high-load systems. This differentiated positioning covers the needs of most industrial hydraulic systems, making the three pumps highly versatile and adaptable in different application fields.

Application Scenarios

Due to their excellent performance, stable operation and differentiated displacement design, YUKEN PV2R1-6, PV2R2-26 and PV2R2-35 vane pumps are widely used in various fields requiring stable hydraulic power supply, with clear differentiated application focuses based on their displacement characteristics:

• YUKEN PV2R1-6 Application: It is mainly used in small hydraulic systems with small flow demand and limited installation space, such as small CNC machine tools, precision grinders, small injection molding machines, shoe-making machinery and light-duty hydraulic tools. It provides stable hydraulic power for the equipment’s executive components, ensuring the accuracy and smoothness of processing and production operations.