PFE-42056/3DT/20 | Atos Type High Pressure Vane Pump 55.8 cm³/rev

Product Overview

The PFE-42056/3DT/20 is a fixed-displacement high-pressure vane pump from the PFE-42 series, designed as a direct drop-in replacement for Atos-type hydraulic pumps. This series features a twelve-vane, cartridge design with integral hydraulic balancing for high-pressure operation, long service life, and low noise levels.

Manufactured to strict Atos PFE series OEM specifications, the PFE-42056/3DT/20 offers 55.8 cm³/rev displacement with SAE B 2-bolt flange mounting and a keyed drive shaft. Our products achieve 100% interchangeability with original equipment in materials, machining precision, seals, and performance characteristics. Every unit undergoes 100% factory testing under simulated operating conditions to ensure reliable performance in injection molding machines, machine tools, and various industrial hydraulic systems.

Model Code Breakdown:

• PFE — Fixed displacement vane pump series

• 42 — Body size (PFE-42 series, max displacement 85 cm³/rev)

• 056 — Displacement code (55.8 cm³/rev)

• 3 — Drive shaft type (keyed, for high torque applications)

• D — Direction of rotation: clockwise (viewed from shaft end, standard)

• T — Port orientation: standard position

• 20 — Design/series number

Technical Specifications 

Model Number

• PFE-42056/3DT/20

Pump Type

• Fixed displacement vane pump

Geometric Displacement

• 55.8 cm³/rev

Maximum Working Pressure

• 280 bar (28 MPa)

• Note: 160 bar maximum when using HFDU, HFDR, or HFC fire-resistant fluids

Rated Continuous Working Pressure

• 210 bar (21 MPa)

Speed Range

• Minimum 1,000 r/min, Maximum 2,200 r/min

• Note: /PE versions limited to 1,800 r/min maximum

Direction of Rotation

• Clockwise (viewed from shaft end, standard)

Mounting Flange

• SAE B 2-bolt flange

Drive Shaft Type

• Keyed shaft (code 3)

Port Connections

• SAE 3000 standard flange connections (inlet and outlet)

• Port orientation: Standard T type (four orientations available)

Seal Material

• Standard: NBR (nitrile rubber)

• Optional: FKM (fluororubber, /PE version)

Compatible Hydraulic Fluids

• Mineral oil ISO VG 46 (@ 50°C)

• Fire-resistant fluids: HFDU, HFDR, HFC (160 bar max.)

Volumetric Efficiency

• 94% (at rated conditions)

Noise Level

• Approx. 67 dBA (at rated conditions)

Weight

• Approx. 20.5 kg

Key Technical Advantages

1. Drop-in Interchangeability
Manufactured to exacting Atos PFE-42 series OEM standards, our pump is fully interchangeable with the original PFE-42056/3DT/20 in mounting dimensions, SAE B flange interface, port configurations, and performance characteristics. No modifications to existing hydraulic piping or mounting brackets are required, significantly reducing downtime and retrofit costs.

2. 100% Simulated Operating Condition Testing
Every pump undergoes comprehensive factory performance testing under simulated operating conditions, covering rated pressure, peak pressure, flow characteristics, and temperature rise. This ensures the product is ready for full-load operation immediately upon installation, eliminating early failure risks.

3. Cartridge Modular Design for Easy Maintenance
The PFE series features a cartridge (pumping cartridge) modular design where all internal working components—vanes, rotor, cam ring, and balancing plates—are integrated into a single quickly replaceable assembly. The pump cartridge can be replaced within minutes without disassembling the entire pump body, dramatically reducing service time.

4. Integral Hydraulic Balancing for Superior High-Pressure Performance
The cartridge design incorporates integral hydraulic balancing plates that effectively balance axial and radial hydraulic forces, minimizing internal leakage. Volumetric efficiency reaches 94%, ensuring excellent flow stability even under demanding 280 bar high-pressure conditions.

5. Twelve-Vane Design with Low Noise Operation
The twelve-vane configuration optimizes vane and cam ring contact trajectories, effectively reducing pressure pulsation and fluid-borne noise. Noise levels are approximately 67 dBA at rated conditions, making this pump suitable for noise-sensitive industrial environments.

6. High-Quality Materials and Precision Manufacturing
Critical components are manufactured from high-grade alloy steel and wear-resistant materials, combined with high-precision CNC machining and heat treatment processes. Mounting surface flatness meets Ra ≤ 0.8, with Ra 0.4 recommended, ensuring long-term reliability and service life.

Application Areas

• Injection Molding Machines — Reliable hydraulic power source providing stable flow and pressure output

• Die Casting Machines — High-pressure hydraulic power delivery

• Machine Tool Hydraulic Systems — Hydraulic power units for metal cutting machines and machining centers

• Metallurgical Equipment — Hydraulic systems for rolling mills and continuous casting equipment

• Construction Equipment — Hydraulic auxiliary systems for excavators, loaders, and related machinery

• Marine Hydraulic Systems — Deck machinery, steering gear, and other marine hydraulic actuators

• Material Handling Equipment — Hydraulic systems for cranes and forklifts

• Mining Machinery — Hydraulic equipment for coal and metal mining operations

Expert Maintenance Tips

1. Installation Guidelines

• Verify pump rotation direction matches the drive motor (clockwise/D-type, viewed from shaft end) before installation

• Mounting flange conforms to SAE B 2-bolt standard; ensure mounting bolt torque meets specifications

• Inlet port pressure requirements: -0.15 to +1.5 bar for speeds up to 1,800 r/min; 0 to +1.5 bar for speeds above 1,800 r/min

• Ensure coupling concentricity deviation does not exceed 0.05 mm

2. Hydraulic Fluid Selection and Contamination Control

• Recommended fluid: ISO VG 46 mineral oil (@ 50°C)

• When using HFDU, HFDR, or HFC fire-resistant fluids, maximum pressure is limited to 160 bar

• System cleanliness should be maintained at NAS 1638 Class 9 or better; install return line filtration (≤ 10 μm absolute)

• Seal material: Standard NBR; specify FKM (/PE version) for phosphate ester and special fluids

3. Start-up and Operation

• Pre-lubricate the pump by filling the drain port with clean hydraulic fluid before first start

• Perform 2-3 low-speed jogging cycles under no-load conditions to purge air from the system before applying load

• Operating viscosity should not fall below 24 mm²/s

• Never operate below minimum speed (1,000 r/min) or above maximum speed (2,200 r/min)

4. Scheduled Maintenance

• Replace hydraulic fluid and filters every 2,000 operating hours or annually, whichever comes first

• Regularly monitor pump housing temperature (normal temperature rise ≤ 40°C; maximum housing temperature ≤ 80°C)

• Investigate unusual noise or pressure fluctuations promptly; inspect cartridge assembly for wear

5. Spare Parts Recommendation

• Stock cartridge repair assemblies for quick on-site service without pump body disassembly

• Maintain seal kit inventory, especially for systems using specialty fluids

• Mounting surface flatness requires Ra ≤ 0.8; inspect surface condition during maintenance