ATUS-Axial Piston Variable Pumps-APV-P-500×1000

APV-P-180.3

APV-P Series Axial Piston Variable Pumps
Size NG
11
Displacement
180.3 cm³/rev
Speed
2400 rpm
Flow
432.72 L/min
Nominal pressure
350 bar
Max. Pressure
420 bar
Weight (approx.)
145 - 240 kg

Products and performance

The P series fixed displacement axial piston pumps adopt advanced swashplate-type variable displacement technology to deliver reliable, high-efficiency hydraulic performance for heavy-duty industrial systems. By adjusting the swashplate angle to change the piston stroke, the pump flexibly regulates displacement and precisely adapts to varying hydraulic power and torque demands under different working conditions, achieving excellent controllability and operational efficiency. Its applicable speed range spans 1800 to 3000 rpm, allowing flexible, system-adaptive displacement adjustment to realize energy-saving flow control.
Specified in NG11 size, this pump features a displacement of 180.3 cm³/rev, a rated speed of 2400 rpm and a stable maximum flow of 432.72 L/min. It operates at a nominal pressure of 350 bar with a peak pressure up to 420 bar, enabling durable high-pressure operation for harsh working scenarios.
With outstanding high-torque output and stable variable flow performance, the P series pumps are widely deployed in large hydraulic power units. They provide efficient, consistent and energy-saving hydraulic support for complex industrial environments such as power plants, paper mills and shipyards, serving as a dependable core component for heavy-duty hydraulic systems.

Energy‑Saving Performance

Automatic displacement adjustment reduces energy and hydraulic oil waste while keeping the whole hydraulic system stable in operation.

High Working Efficiency

Optimized power output lowers internal losses and effectively improves the comprehensive efficiency of the complete hydraulic equipment.

Precise Control

Sophisticated variable displacement technology achieves accurate hydraulic control and enhances equipment accuracy and operational stability.

High Adaptability

The pump series maintains consistent and stable working performance under various complex and harsh on‑site operating conditions.

Outstanding Reliability

Delivers stable and trustworthy hydraulic power supply for long‑time continuous operation in heavy‑duty working scenarios.

Specifications

Robust NG11 frame size delivers a solid mechanical foundation, supporting high‑flow and high‑pressure operation for heavy‑duty hydraulic station scenarios.
Large 180.3 cm³/rev displacement generates substantial hydraulic output per revolution, satisfying high‑volume fluid demand for large hydraulic stations.
Rated speed up to 2400 rpm realizes high‑efficiency cyclic operation, matching the working rhythm of large‑scale industrial hydraulic equipment.
High output flow of 432.72 L/min supplies sufficient fluid for multi‑actuator systems, guaranteeing synchronous action of heavy‑duty machinery.
350 bar nominal working pressure offers steady continuous pressure output, coping with long‑duration heavy‑load industrial operating conditions.
Peak pressure reaching 420 bar provides strong overload‑resistant capacity, handling transient pressure shocks within hydraulic stations.
145‑240 kg structural weight achieves good rigidity‑to‑weight ratio, facilitating stable mounting on large hydraulic station bases.
Fits large hydraulic stations for power plants, paper mills and shipyards, offering dependable hydraulic power for complicated heavy‑duty site conditions.

Product Features of P‑Series Variable‑Displacement Axial Piston Pumps

Energy‑saving Operation：Automatic displacement adjustment reduces energy and hydraulic oil waste.
High Hydraulic Efficiency：Optimized power output improves overall system working efficiency.
Precise Control：Advanced variable‑displacement technology realizes accurate hydraulic control.
Improved Equipment Stability：Enhances running accuracy and stability of matched machinery.
Strong Adaptability：Sustains stable performance under diverse harsh working conditions.
High Operational Reliability：Delivers consistent and dependable hydraulic power output.
Stable System Performance：Displacement adjustment guarantees steady hydraulic system status.
Excellent Comprehensive Performance：Balances efficiency, control and durability for heavy‑duty use.
- The factory assembly clearance between piston ball head and slipper ball socket is normally 0.015~0.025 mm.
- After prolonged service, the clearance enlarges. Parts can still be used if the clearance does not exceed 0.3 mm.
- Overlarge clearance will cause increased pulsation of pump outlet pressure and flow.
- In serious cases, loose slippers and slipper detachment may happen, further resulting in severe pump damage.
- Once signs of pressure and flow pulsation are detected, inspect slipper looseness in advance and conduct slipper re-clinching promptly.
- After long-term operation, concave deformation will form on the flat surface of the swash plate.
- The workpiece can be surface-ground followed by nitriding treatment.
- If the removed material thickness (e.g. 0.2 mm) does not completely eliminate the original nitrided layer, re-nitriding may be omitted.
- Hardness inspection of the swash plate surface is mandatory in such cases.
- Excessive bearing internal clearance will break the normal clearance of friction pairs and damage the oil film thickness of hydrostatic support, shortening the service life of piston pumps.
- The average service life of general bearings reaches 1000 hours (roughly more than two years). Bearings shall be replaced as appropriate after exceeding this service period.
- Replace with bearings of the identical model marked on the removed old bearing, or verified interchangeable alternatives.
- If grooves are scratched on the swash plate surface by piston ball heads (applicable to radial piston pumps), laser cladding with alloy powder is recommended for repair.
- Laser cladding ensures high bonding strength and hardness of deposited material without reducing the hardness of surrounding base metal.
- Manual overlay welding with chromium-type welding electrodes is an alternative method. The repaired swash plate surface requires re-heat treatment, preferably in a nitriding furnace.
- Regardless of the repair method adopted, the original dimensional accuracy, hardness and surface roughness of the swash plate must be restored.
Low oil Level Inclination Angle-Front Up
45 °
Low oil Level Inclination Angle-Back Up
45 °
Low oil Level Inclination Angle-Fuel Pump Side Up
45 °
Low oil Level Inclination Angle-Exhaust Side Up
45 °
Oil Sump Capacity-Upper Limit
14.2 L
Oil Sump Capacity-Lower Limit
12.4 L
Capacity of The Whole System
16.4 L
Main Causes and Troubleshooting Methods for Hydraulic Pump No Oil Suction / No Oil Discharge
  • Damage to the hydraulic pump, pump motor, or coupling between motor and pump. Replace the faulty pump, motor or coupling in a timely manner.
  • Too low oil level in the tank or excessively high pump installation position causes suction failure. Refill oil to the gauge level or adjust the pump height to keep the suction lift within the specified range.
  • Oil impurities and increased viscosity block the suction filter and oil pipe. Clean pipes and filters regularly and replace with qualified hydraulic oil as required.
  • Oil impurities and increased viscosity block the suction filter and oil pipe. Clean pipes and filters regularly and replace with qualified hydraulic oil as required.
Main causes and troubleshooting methods for hydraulic pumps discharging oil but lacking pressure and exhibiting reduced efficiency.
  • Severe wear of internal sliding parts leads to low volumetric efficiency and excessive axial/radial clearance. Replace the hydraulic pump or perform complete overhaul.
  • Damaged oil pipes and poor suction-side sealing cause air intake. Check all connections, reseal joints or replace damaged pipelines.
  • Blocked oil pipes and heavily contaminated filters. Clean pipelines and filters thoroughly to ensure full flow cleanliness.
  • Incorrect variable pump adjustment and severely worn relief valve spool. Readjust flow parameters and replace worn relief valve components for stable pump operation.
  • Motor speed below rated value and internal foreign impurities. Match the correct motor per specifications and clean internal impurities timely.
Major Causes of Excessive Noise During Hydraulic Pump Operation and Methods for Troubleshooting
  • Mostly caused by clogged filter, low oil level, air inhalation via oil seal and pipelines. Check tank oil level, repair pipelines, inspect pump seals, clean pipes and filters, and replace hydraulic oil periodically.
  • Excessively high oil viscosity, low oil temperature and entrained air bubbles. Select suitable hydraulic oil according to seasons.
  • Damaged coupling or misalignment between pump and motor leads to heavy vibration and loud noise. Inspect coupling wear, replace coupling and complete alignment strictly as installation requirements.
  • Operating speed exceeds rated value and mismatched driving motor. Reduce pump speed and select a suitable motor.
  • Worn shaft seal causes air intake; loose pump end cover bolts. Replace pump shaft seal and tighten cover bolts.
  • Low gear precision, poor contact or damaged internal parts of gear pump. Replace or grind gears, renew damaged components.
  • Insufficient axial clearance, out-of-tolerance perpendicularity or parallelism. Replace the gear pump entirely.
  • Blockage inside relief valve. Clean or replace the relief valve.
  • Vibration generated by unfixed pipelines. Secure all hydraulic pipelines firmly.
Main Causes of Oil Leakage from Hydraulic Pump Bodies and Methods for Rectification
  • Failure of the piston pump central spring breaks sealing between cylinder block and valve plate. Replace the spring and re-seal the mating surface.
  • Damaged oil seals or worn/poorly fitted gaskets at pipeline connections. Replace all defective sealing parts.
  • Severe wear of internal pump parts resulting in oversized operating clearances. Replace or refit the relevant components.
Main Causes of Hydraulic Pump Overheating and Troubleshooting Methods
  • Excessively high or low oil viscosity, and accumulated impurities after long service. Replace hydraulic oil in a timely manner and adopt oil with proper viscosity.
  • Heavy wear between pump side plates, shaft sleeves and gear end faces leads to overheating. Replace side plates, shaft sleeves or install a new hydraulic pump.
  • Small tank volume restricts heat dissipation and triggers high oil temperature. Increase tank capacity and expand heat dissipation area.
Installation Drawing
Download
Installation Manual
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Operation Manual
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Parts Catalogue
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Report & Certifcate
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Other Models

APV-P-501.5APV-P Series
501.5cm³/rev
Speed
1800 rpm
Flow
902.7 L/min
Weight (approx.)
340 - 375 kg
Nominal pressure
350 bar
APV-P-403.2APV-P Series
403.2cm³/rev
Speed
2100 rpm
Flow
846.72 L/min
Weight (approx.)
340 - 375 kg
Nominal pressure
350 bar
APV-P-229.5APV-P Series
229.5cm³/rev
Speed
2400 rpm
Flow
550.8 L/min
Weight (approx.)
145 - 240 kg
Nominal pressure
350 bar
APV-P-180.3APV-P Series
180.3cm³/rev
Speed
2400 rpm
Flow
432.72 L/min
Weight (approx.)
145 - 240 kg
Nominal pressure
350 bar
APV-P-131.1APV-P Series
131.1cm³/rev
Speed
2100 rpm
Flow
275.31 L/min
Weight (approx.)
80 - 135 kg
Nominal pressure
350 bar
APV-P-118.8APV-P Series
118.8cm³/rev
Speed
3000 rpm
Flow
356.4 L/min
Weight (approx.)
80 - 135 kg
Nominal pressure
350 bar
APV-P-98.3APV-P Series
98.3cm³/rev
Speed
3000 rpm
Flow
294.9 L/min
Weight (approx.)
80 - 135 kg
Nominal pressure
350 bar

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Power OutPut
180 HP(132kW)
Max Torque
610 Nm
Displacement
5.9L
6 Inline
5.9L
Fuel System
Bosch Mechancial Pump
Emission Standard
Euro II

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