1. Overall Model Definition
Full name: Parker PVplus Series Through-drive Tandem Variable Displacement Axial Piston Pump. It consists of a main PV270 pump coupled with an auxiliary PV080 or PV092 pump via an extended through shaft, driven by one common input spindle. Primarily deployed as the main hydraulic power unit for 30–70 ton heavy-duty excavators, crawler cranes and mining construction machinery, it is an original Parker heavy-duty main pump assembly for open hydraulic circuits.
2. Model Breakdown
1. Parker
Parker Hannifin, a globally leading hydraulic brand. This pump belongs to the mature PVplus heavy-duty axial piston pump product line, mass-produced in Germany for harsh working conditions such as mining and quarrying operations.
2. PV270 (Main Pump)
PV denotes the PVplus swashplate axial piston pump series; 270 refers to the nominal displacement of 270cc/rev (cubic centimeter per revolution). It serves as the high-flow main oil supply unit, delivering fluid to travel mechanisms, boom, arm and bucket actuators.
3. +80 / +92 (Tandem Auxiliary Pump)
+80 stands for auxiliary pump PV080 with 80cc/rev displacement; +92 stands for auxiliary pump PV092 with 92cc/rev displacement. Driven coaxially by the main pump’s through shaft without extra power input.
- PV270+80: Total combined displacement 350cc/rev. The small-displacement auxiliary pump mainly supplies oil for pilot control, cooling motors and auxiliary cylinders.
- PV270+92: Total combined displacement 362cc/rev. The high-flow auxiliary pump supports system flow combining, heavy-load excavation and matched installation of high-flow hydraulic breakers.
4. Tandem Structure
Professional hydraulic term for through-drive layout: the extended output shaft of the main pump engages the spline of the auxiliary pump. The integrated design saves installation space and reduces power transmission loss.
5. Variable Displacement Piston Pump
Variable Displacement Axial Piston Pump adjusts output flow in real time by changing the swashplate angle, adapting oil supply to load conditions to save energy and prevent engine stalling under heavy loads.
3. Core Technical Specifications
- Structure: 9-piston swashplate axial piston configuration
- Continuous rated working pressure: 350bar (35MPa)
- Instant peak impact pressure: 420bar (42MPa)
- Recommended operating speed: 1200–1800rpm
- Maximum speed: PV270: 1800rpm; PV080: 2500rpm; PV092: 2300rpm
- Optional control modes: Constant power FFR/FFD, Load Sensing LS (WLC), Constant Pressure MMC, Proportional Electric Variable Control
- Mounting Standard: ISO3019-2 / SAE flange mounting
- Compatible Fluid: ISO VG46 & VG68 anti-wear hydraulic oil; fitted with NBR/FKM composite seals
- Structural Feature: Shared suction port with independent delivery ports; separate pressure and displacement regulation available for both pumps
4. Oil Circuit Division & Working Principle
Engine power drives the main spindle to rotate the main pump cylinder block. The variable regulator modifies the swashplate angle to adjust the flow output of PV270. The main pump’s rear through shaft simultaneously drives the auxiliary PV080/PV092 pump. The two pumps adopt independent delivery ports and one shared suction port:
1. PV270 Main Pump: Supplies the main hydraulic circuit for compound digging movements and travel drive.
2. PV080/PV092 Auxiliary Pump: Feeds fluid to pilot control valves, swing motors, hydraulic breakers, cooling hydraulic motors and other auxiliary systems.
Matching separate valve groups allows independent adjustment of pressure and flow for both pumps without mutual interference.
5. Model Selection Difference Between Two Configurations
1. PV270+80
Moderate auxiliary pump displacement with stable oil supply for the pilot system. Cost-effective for heavy excavators engaged in conventional earthmoving tasks.
2. PV270+92
Higher auxiliary pump flow enables main & auxiliary circuit flow combining. Delivers sufficient oil supply during heavy-load excavation and long-hour breaker operation, the preferred option for high-power heavy-duty equipment.
6. Key Product Advantages
1. Integrated through-drive tandem design eliminates external couplings and mounting brackets, simplifying pipeline layout and lowering oil leakage failure rates.
2. Carburized pistons and valve plates deliver strong contamination resistance and wear resistance for stable long-duration continuous operation.
3. Multiple variable control options precisely match the engine power curve to cut fuel consumption and avoid engine stall under heavy loads.
4. Modular component design enables individual replacement of regulators, piston assemblies and valve plates, controlling maintenance costs.
7. Main Applicable Equipment
30–70 ton large excavators, crawler cranes, rotary drilling rigs, mining tunneling machinery, heavy port handling equipment and heavy-duty metallurgical hydraulic power stations.
8. Standard English Titles for Foreign Trade
Short Listing Title: Parker PV270+80 / PV270+92 Tandem Variable Displacement Axial Piston Pump
Full Customs Declaration Title: Original Parker PVplus Series Through-drive Tandem Hydraulic Piston Pump (Main Pump PV270 + Auxiliary Pump PV080/PV092)
