Parker PV Series Open-Circuit Variable Displacement Swash Plate Axial Piston Pumps

I. Core Technical Parameters

II. Working Principle

1. The drive shaft drives the cylinder block to rotate, and the swash plate forces the pistons to make reciprocating linear movements in the cylinder block.
2. The reciprocating movement of the pistons changes the internal volume of the cylinder block, and the oil suction and discharge cycles are completed through the suction and discharge windows of the valve plate.
3. The variable displacement mechanism precisely adjusts the displacement (continuously adjustable from 0 to maximum displacement) by changing the swash plate angle.
4. The valve plate adopts an advanced design to ensure reliable sealing and low wear under high pressure.

III. Core Structural Features

1. Modular Design: The modular structure facilitates maintenance and replacement, provides high configuration flexibility, and supports strategic inventory management.
2. High Efficiency Performance: Optimized flow channel design and precision manufacturing processes ensure high efficiency and low energy consumption, reducing operating costs.
3. Rapid Response: The combination of a large variable displacement piston and a strong return spring achieves millisecond-level control response to adapt to dynamic load changes.
4. 9-Piston Design: Compared with traditional 7-piston pumps, it has smaller flow pulsation, more stable operation and lower noise.
5. High Reliability: Heavy-duty bearing system and wear-resistant materials ensure long service life under harsh working conditions.
6. Multi-Functional Control: Supports multiple control combinations, including:
   1. Standard pressure regulator
   2. Power regulator (constant power control)
   3. Load-sensing control
   4. Electro-hydraulic proportional control, etc.

IV. Main Models and Nomenclature Rules

1. Common Models

2. Typical Model Interpretation (e.g., PV046R1K1T1NMMC)

• PV046: Basic model (displacement 46 cc/rev)
• R/L: Rotation direction (Right/Left rotation)
• 1: Control type code
• K1: Regulator type
• T1: Shaft end type
• NMMC: Seal and installation options

V. Application Fields

1. Heavy Industry: Metallurgical equipment, mining machinery, injection molding machines, presses, test benches and hydraulic stations
2. Marine Industry: Marine deck machinery, steering gear systems, hydraulic power units
3. Energy Sector: Wind power equipment, oil drilling machinery, power station auxiliary machinery
4. Construction Machinery: Concrete pump trucks, cranes, loaders and other high-pressure hydraulic systems
5. Others: Aerospace ground equipment, special vehicle hydraulic systems

VI. Advantages and Value

1. Improve System Performance: High pressure and high flow output to meet the needs of complex hydraulic systems.
2. Reduce Operating Costs: High-efficiency design reduces energy consumption, and long service life reduces maintenance frequency and downtime.
3. Enhance Control Precision: Multiple control methods are available to achieve precise regulation and intelligent control of the system.
4. Global Support: Parker’s global service network provides technical support and spare parts supply to ensure continuous operation of equipment.

VII. Selection and Maintenance Points

1. Selection Suggestions: Select the appropriate model according to the system’s pressure, flow, speed and control requirements. Consult the Parker technical team if necessary.
2. Installation Requirements: Strictly follow the VDMA standard for installation, ensure coaxiality and installation torque, and use the recommended hydraulic oil.
3. Maintenance Cycle: Regularly replace the filter element and hydraulic oil according to the working conditions, monitor the oil temperature and pressure, and handle abnormalities in a timely manner.
4. Spare Parts Replacement: It is recommended to use Parker original spare parts to ensure the performance and service life of the pump.