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Product details

Parker P3145 Series Axial Piston Variable Displacement Pump

1. Overview

The Parker P3145 is a boosted axial piston variable displacement pump, belonging to Parker P3 series. It features a displacement of 145 cm³/rev and is engineered for open circuits of heavy-duty mobile machinery.

2. Main Technical Specifications (Standard Version)

- Nominal displacement: 145 cm³/rev (8.85 in³/rev)

- Continuous rated pressure: 320 bar (4600 psi); Peak pressure: 350 bar

- Maximum flow: 250 L/min (66 GPM) @ 1800 rpm & 300 bar

- Operating speed range: 600–2200 rpm; Maximum speed: 2500 rpm (at 1 bar absolute suction pressure)

- Maximum torque: 820 N·m (7259 lb·in)

- Housing material: Cast iron; Approx. weight: 78 kg

- Operating temperature: -40°C to +115°C (Short-time peak: +120°C)

- Fluid viscosity range: 10–1000 cSt; Optimal viscosity: 15–40 cSt

- Standard seal material: Nitrile Butadiene Rubber (NBR); Optional: Fluoroelastomer (FKM)

3. Model Code Explanation (Take P3145S6004 as example)

- P3: Boosted design

- 145: Nominal displacement 145 cm³/rev

- S: Standard hydraulic servo control

- 6004: Control code (Pressure compensation + flow limitation, SAE flange)

4. Design Features & Advantages

1. Boosted Structure

Built-in pre-boost structure enables excellent suction performance, supporting maximum speed up to 2500 rpm, suitable for high-altitude and low inlet pressure working conditions.

2. Low Pulsation & Low Noise (Patented Design)

Equipped with integrated ripple chamber, reducing pressure pulsation by 40%–60% and effectively lowering operating noise.

3. Hydraulic Servo Control

Fast response and stable outlet pressure. Available with combined pressure, flow and power control for superior energy efficiency.

4. Direct Mount & Through-Drive Design

SAE B flange for direct installation on gearboxes. Optional through-drive design allows series connection with other pumps for flexible system integration.

5. Heavy-Duty & High Power Density

Designed for continuous operation under 320 bar. Compact structure with high power density, ideal for heavy-load working scenarios.

5. Available Control Options

- Pressure compensation (DR): Maintains constant outlet pressure

- Flow compensation (DFR): Load sensing, delivers oil on demand

- Power compensation (DFLR): Constant power control to avoid engine overload

- Electro-proportional control (E): Stepless remote displacement adjustment

6. Typical Applications

- Construction machinery: Excavators, loaders, cranes, road rollers

- Mining machinery: Roadheaders, crushing plants, underground vehicles

- Industrial high-pressure systems: Hydraulic power units, injection molding machines, test rigs

7. Replacement & Upgrades

- OEM upgrade: Parker PVplus 145 (100% interchangeable, higher efficiency and lower noise)

- Equivalent alternatives: A4VSO145, PVM141, PV145 and other pumps with identical displacement and pressure rating

Parker P3145 Series Axial Piston Variable Displacement Pump: Detailed Introduction

I. Product Overview

The Parker P3145 Series axial piston variable displacement pump is a high-performance hydraulic pump manufactured by Parker Hannifin Corporation. Designed specifically for open-circuit and heavy-duty mobile hydraulic systems, this pump features a swashplate variable mechanism, offering high pressure, high power density, and low noise characteristics. It is widely used in construction machinery, mining equipment, shipbuilding, agricultural machinery, and other fields.

II. Technical Specifications

• Displacement: 145 cm³/rev (8.85 in³/rev)

• Maximum Pressure:

• Continuous working pressure: 320 bar (4,600 psi)

• Peak pressure: 350 bar (5,075 psi)

• Maximum Flow Rate: 362 L/min (79 GPM) @ 1,800 rpm

• Speed Range: 600–2,200 rpm (up to 2,800 rpm)

• Control Method: Hydraulic servo control (with pressure/flow compensation)

• Housing Material: Cast iron

• Weight: Approximately 78 kg

• Operating Temperature: -40°C to +115°C

• Oil Viscosity: 10–1,000 cSt (optimal: 15–40 cSt)

III. Model Interpretation (Example: P3145S6004)

• P3: Pressure-boosted design (internal pressure boosting for enhanced self-priming capability)

• 145: Nominal displacement of 145 cm³/rev

• S: Standard control (hydraulic servo)

• 6004: Control code (pressure compensation + flow limitation, SAE flange connection)

IV. Key Features

1. Pressure-Boosted Design:

• Stable operation under high-altitude or high self-priming speed conditions.

• Enhanced self-priming capability for complex working conditions.

2. High Pressure and High Power Density:

• Continuous working pressure of 320 bar, suitable for heavy-duty applications.

• High power density design to meet high-load demands.

3. Hydraulic Servo Control:

• Fast response and stable pressure for energy-efficient operation.

• Multiple control options to suit different application requirements.

4. Direct-Mount Design:

• Can be directly mounted on gearboxes, saving space and cost.

• Simplified system layout for improved installation efficiency.

5. Low Noise Level:

• The pump's low-noise design helps reduce noise pollution and improve operator comfort.

6. Standard Pressure Gauge Port:

• Convenient for monitoring system pressure to ensure safe operation.

V. Application Scenarios

• Construction Machinery: Excavators, loaders, cranes, etc.

• Mining Equipment: Roadheaders, mining trucks, etc.

• Shipbuilding: Hydraulic steering gear, deck machinery, etc.

• Agricultural Machinery: Combine harvesters, tractors, etc.

• Industrial Sector: Industrial high-pressure hydraulic stations, metallurgical equipment, etc.

VI. Optional Configurations and Customization Services

• Multiple Control Methods: Choose from different control codes based on application requirements to achieve pressure compensation, flow limitation, and other functions.

• Special Materials and Coatings: Offer options for corrosion-resistant, wear-resistant, and other special materials and coatings to extend the pump's service life.

• Customized Design: Provide customized pump design and manufacturing services based on specific customer needs.