Product Overview
The PVM131ER13GS2L315200401AB (Eaton material number 123AL00041B) is a Vickers (now Danfoss) PVM Series open-circuit swashplate-type axial piston variable displacement pump. The PVM Series is Vickers’ classic industrial product line, covering displacements from 18 to 141 cm³/rev, with the PVM131 representing a large-displacement model in the series. This model delivers a maximum displacement of 131.1 cm³/rev (8.00 in³/rev) .
This model features ER control—Pressure Compensator control, which automatically adjusts the swashplate angle in response to system pressure changes to maintain constant system pressure. R denotes right-hand rotation (clockwise when viewed from the shaft end). 13 denotes the SAE J744-44-1 input shaft specification. GS2L is the mounting flange, port configuration, and seal material code. 315 indicates the 315 bar pressure rating. 200401AB is the production batch and configuration code. The housing material is cast steel.
As a direct OEM-equivalent replacement solution for the Vickers PVM Series, this product offers complete in-situ interchangeability, strictly adhering to Vickers’ original design specifications and mounting interface standards. Every unit undergoes 100% simulated duty-cycle testing, ensuring that key performance metrics—including volumetric efficiency, pressure-flow characteristics, and case drain flow at rated pressure and full displacement—meet or exceed original factory specifications.
Technical Specifications
Model Number: PVM131ER13GS2L315200401AB
Eaton Material Number (MAT. NO.): 123AL00041B
Brand Series: Vickers PVM Series
Pump Type: Swashplate Axial Piston Variable Displacement Pump (Open Circuit)
Maximum Displacement: 131.1 cm³/rev (8.00 in³/rev)
Maximum Continuous Pressure: 315 bar (4568 psi)
Peak Pressure (Intermittent): 350 bar (5075 psi)
Rated Speed: 1800 rpm
Maximum Input Speed: 2000 rpm
Control Type: Pressure Compensator
Rotation Direction: R – Right-hand (clockwise from shaft end)
Mounting Flange: SAE J744-127-4 (Type C, 4-bolt)
Shaft Type: SAE J744-44-1 (SAE D, Straight)
Main Port Location: End
Port Option: SAE J518 Flange Ports
Pump Features: Adjustable Maximum Displacement Stop (with single shaft seal)
Bearing Life at Rated Pressure: 8000 hours
Noise Level: 64 dB
Maximum Case Pressure: 350 bar
Cold Start Temperature Limit: 104 °C
Housing Material: Cast Steel
Hydraulic Fluid: Mineral Oil / Phosphate Ester Fire-Resistant Fluid
Weight: Approx. 140 kg
Key Technical Advantages
1. Proven Rotating Group with 315 bar Continuous Pressure Capability
The PVM131 features a proven rotating group that enables stable long-term operation at 315 bar (4568 psi) continuous working pressure, with peak pressures up to 350 bar. High-load bearings and a rigid drive shaft ensure 8000 hours of pump life under rated industrial conditions.
2. Saddle-Type Yoke with Steel-Backed Polymer Bearings for Extended Service Life
The PVM Series features a saddle-type yoke design with steel-backed polymer bearings. The rigid yoke reduces deflection and ensures uniform bearing load distribution, significantly extending service life. A single control piston reduces yoke loading, resulting in reduced pump size that allows installation in tighter locations.
3. Three-Piece Housing with Bimetallic Timing Plate for Ultra-Quiet Operation
The PVM Series features a three-piece housing (flange, housing, and valve block) design specifically engineered for low fluid-borne and structure-borne noise levels. The bimetallic timing plate improves pump filling characteristics, reducing fluid noise and extending pump service life. Operating noise level is just 64 dB, meeting today’s demanding working condition requirements.
4. Extremely Low Pressure Ripple (≤ 4%) with Adjustable Maximum Displacement Stop
The PVM Series delivers extremely low pressure ripple of just 4% . The adjustable maximum displacement stop is standard equipment, allowing precise setting of maximum output flow based on system requirements. Inlet and outlet pressure gauge ports are standard for convenient on-site monitoring and commissioning.
5. Broad Fluid Compatibility Including Phosphate Ester Fire-Resistant Fluids
PVM Series pumps are compatible with a wide range of hydraulic fluids used in industrial hydraulic systems. In addition to typical petroleum-based and synthetic fluids, they can accommodate high-water-content fluids and phosphate ester fire-resistant fluids. The PVM131ER13GS2L315200401AB fully complies with DL/T 571-2014 guidelines for phosphate ester fire-resistant fluid operation and maintenance in power plants, making it the preferred choice for power plant EH oil systems.
Application Areas
Power Plant EH Oil Control Systems: Main pump for turbine digital electro-hydraulic control (DEH) systems, providing stable high-pressure oil supply
Injection Molding Machines: Replaces fixed-displacement pumps for variable flow control, delivering significant energy savings
Metal Forming & Cutting Equipment: Metal forming machines and metal cutting machine tools
Mining Machinery: Hydraulic systems for mining equipment
Oil & Gas Equipment: Hydraulic power units for oil and gas industry applications
Conveyor Lines & Material Handling Equipment
Primary Metals Industry: Hydraulic systems for metallurgical equipment
Expert Maintenance Tips
Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as PVM131ER13GS2L315200401AB with Eaton material number 123AL00041B. This model features SAE C 4-bolt flange mounting (SAE J744-127-4) with an SAE D straight shaft (SAE J744-44-1). Ensure alignment between the pump and drive mechanism meets SAE mounting standards to prevent premature bearing wear due to misalignment. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.
Fluid Cleanliness & Medium Confirmation: This model is compatible with both mineral hydraulic oils and phosphate ester fire-resistant fluids. For EH oil system applications (phosphate ester fluids), pre-commissioning fluid acid value should be < 0.15 mgKOH/g, moisture < 1000 ppm, and particulate cleanliness NAS ≤6. For high-water-content fluids such as water-glycol, confirm seal material compatibility.
Pressure Compensator Tuning: This model features standard pressure compensator control. The compensator pressure set point can be adjusted via the adjustment bolt. Compensator adjustment range covers 580–1885 psi (approx. 40–130 bar). Perform initial settings under no-load conditions, then gradually increase load to target pressure with fine adjustments. The compensator setting should not exceed the pump’s rated pressure (315 bar).
Initial Start-Up & Priming: Before first start-up, pre-lubricate the pump by filling the housing with clean hydraulic fluid through the case drain port. Perform a brief jog start (5–10 seconds) to check for abnormal noise, leakage, or excessive vibration. Then正式 start the pump and run at low load for several minutes to purge air from the pump and system lines. Cold start temperature limit is 104 °C.
Case Drain Port Positioning & Pressure Monitoring: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown. Maximum case pressure is 350 bar. Install a pressure gauge on the case drain line for real-time monitoring.
Scheduled Maintenance & Adjustable Displacement Stop Inspection: Follow the maintenance intervals specified in the Vickers PVM Series service manual. Pay particular attention to filter condition, fluid cleanliness, and seal integrity during routine inspections. Periodically verify the adjustable maximum displacement stop setting to ensure it has not been inadvertently altered.
