VPPL-016PC5-R00S/20N Duplomatic Variable Axial Piston Pump

Product Overview

The Duplomatic VPPL-016PC5-R00S/20N is a Series 20 variable displacement axial-piston pump designed for open-circuit hydraulic systems in the low-to-medium pressure range.

The current Duplomatic product page confirms that the VPPL family uses a variable swash-plate architecture, offers seven displacement sizes from 8 to 100 cm³/rev, and is intended for medium-pressure open-circuit applications. The VPPL family reaches up to 280 bar maximum operating pressure, but the specific VPPL-016PC5 configuration uses the PC5 pressure regulator with a pressure adjustment range of 30–210 bar.

The second configuration, VPPM-029PC-R55S/10N000, belongs to the Duplomatic VPPM Series 10. The VPPM is a medium-high-pressure open-circuit variable displacement axial-piston pump. The 029 frame provides 29 cm³/rev, a maximum speed of 3000 rpm, 280 bar continuous pressure, 315 bar intermittent pressure and 350 bar peak pressure.

For replacement applications, the complete ordering code should be matched rather than relying only on the nominal displacement.

Technical Specifications

VPPL-016PC5-R00S/20N

• Brand: Duplomatic MS
• Series: VPPL Series 20
• Pump Type: Variable displacement axial-piston pump
• Circuit: Open circuit
• Maximum Displacement: 16 cm³/rev
• Flow at 1500 rpm: 24 L/min
• Minimum Speed: 500 rpm
• Maximum Speed: 2000 rpm
• Control: PC5 pressure regulator
• PC5 Pressure Adjustment Range: 30–210 bar
• Default PC5 Setting: 210 bar
• Mounting Flange: SAE-2
• Shaft: Cylindrical keyed shaft, SAE J744
• Rotation: Clockwise
• Hydraulic Connection: SAE flange with metric bolts; BSP drain connection
• Seal: NBR
• Reference Mass: approximately 12 kg
• Pump Body Oil Volume: approximately 0.3 dm³
• Ambient Temperature: -10 to +50 °C
• Fluid Temperature: -10 to +70 °C
• Recommended Viscosity: 20–50 cSt
• Fluid: Mineral-oil hydraulic fluids, HL/HM according to ISO 6743-4
• Maximum Contamination Class: ISO 4406:1999 Class 20/18/15
• Recommended Cleanliness for Longer Life: ISO 4406:1999 Class 20/16/13

Peak-pressure note: The available current and archived Duplomatic documentation does not provide a sufficiently clear, independent peak-pressure figure specifically for the VPPL-016PC5 configuration. The technically safe value to publish for this exact model is therefore the 210 bar PC5 pressure-control limit, rather than assigning the VPPM 350 bar peak rating to the VPPL model.

VPPM-029PC-R55S/10N000

• Brand: Duplomatic MS
• Series: VPPM Series 10
• Pump Type: Variable displacement axial-piston pump
• Circuit: Open circuit
• Maximum Displacement: 29 cm³/rev
• Flow at 1500 rpm: 43.5 L/min
• Maximum Speed: 3000 rpm
• Continuous Maximum Delivery Pressure: 280 bar
• Intermittent Maximum Delivery Pressure: 315 bar
• Peak Maximum Delivery Pressure: 350 bar
• Control: PC pressure regulator
• PC Pressure Adjustment Range: 20–350 bar
• Default PC Setting: 280 bar
• Rotation: Clockwise
• Mounting Flange: ISO 3019/2
• Shaft: Cylindrical keyed ISO 3019/2 shaft
• Hydraulic Connection: SAE flange with metric bolts; BSP drain
• Seal: NBR
• Intermediate Flange: 000 = single pump without intermediate flange
• Reference Mass: approximately 18 kg
• Recommended Viscosity: 15–35 cSt
• Fluid Temperature: -25 to +80 °C
• Ambient Temperature: -15 to +70 °C

Key Technical Advantages

1. Variable Swash-Plate Displacement

Both VPPL and VPPM use variable swash-plate technology. Pump flow changes with both shaft speed and swash-plate angle, allowing continuous displacement modulation to match hydraulic demand.

2. Accurate Pressure Regulation

The VPPL-016PC5 uses a PC5 pressure regulator with a 30–210 bar adjustment range.

The VPPM-029PC uses a PC pressure regulator with a documented 20–350 bar adjustment range and a default setting of 280 bar. These values should remain separated in technical marketing content.

3. Mechanical Displacement Limitation

Mechanical adjustment screws can limit the minimum and maximum swash-plate angle, giving the designer control over the usable displacement range. VPPM pumps are documented with standard minimum and maximum displacement limit controls.

4. High Shaft Load Capability of VPPM

Duplomatic specifically highlights the ability of the VPPM design to withstand relatively high axial and radial shaft loads, which is important for industrial pump-drive configurations.

5. Standardized Mounting Interfaces

The VPPL-016 uses an SAE-2 mounting flange and SAE J744 keyed shaft, while the VPPM-029 configuration uses an ISO 3019/2 mounting flange and ISO keyed shaft. These standardized interfaces support serviceability and equivalent-replacement projects, provided the complete code is matched.

6. Hydraulic Cleanliness as a Reliability Factor

The VPPL documentation specifies ISO 4406 contamination limits and recommends improved cleanliness for extended service life. The VPPM documentation likewise specifies a defined contamination class and emphasizes filtration to prevent cavitation and premature wear.

7. Controlled Engineering Claims

The manufacturer’s published material does not provide exact alloy grades or heat-treatment hardness values for the rotating-group components. Therefore, the product description should focus on verified pump architecture, control performance, sealing configuration, standardized interfaces and operating data instead of unsupported material claims.

Application Areas

The VPPL and VPPM families are designed for variable-flow open-circuit hydraulic applications. Typical application areas include:

• Industrial Hydraulic Power Units
• Machine Tools
• Pressing and Forming Machinery
• Material Handling Equipment
• General Manufacturing Machinery
• Oil-Hydraulic Automation Systems
• Medium-Duty Open-Circuit Hydraulic Systems
• Hydraulic Test Equipment

Final application suitability should be verified against system pressure, flow, shaft speed, installation dimensions, port configuration and control requirements.

Expert Maintenance Tips

1. Keep VPPL-016 PC5 Below Its 210 Bar Control Limit

The PC5 regulator is specified for 30–210 bar on VPPL sizes 008 through 046. The 280 bar maximum operating-pressure figure for the wider VPPL family should not be incorrectly applied to the VPPL-016PC5 configuration.

2. Separate VPPM-029 Continuous, Intermittent and Peak Ratings

For VPPM-029:

• 280 bar: continuous maximum delivery pressure
• 315 bar: intermittent maximum delivery pressure
• 350 bar: peak maximum delivery pressure

The archived technical documentation specifies intermittent duty at approximately 10% of working time, so 315 bar and 350 bar should never be marketed as continuous pressure ratings.

3. Keep the Pressure-Regulator Circuit Clean

Contamination can cause spool sticking or delayed pressure-regulator response, resulting in pressure instability, abnormal unloading or poor system response.

4. Protect the Suction Circuit

The VPPL documentation recommends a suction filter with bypass protection and, where possible, a clogging indicator. The filter should be properly sized to avoid excessive inlet restriction and cavitation.

5. Maintain Correct Hydraulic-Oil Viscosity

VPPL:

• Minimum viscosity: 10 cSt
• Recommended viscosity: 20–50 cSt
• Maximum viscosity: 1000 cSt for cold starting only

VPPM:

• Recommended viscosity: 15–35 cSt
• Minimum viscosity: 10 cSt
• Maximum viscosity: 1000 cSt for cold starting only

6. Check Drainage and Installation Orientation

VPPM documentation allows horizontal installation and vertical installation with the shaft upward, but the drain-port orientation must maintain adequate oil level inside the pump body for bearing lubrication.

7. Match the Complete Ordering Code for Replacement

A proper replacement check should include:

• Displacement
• Regulator type
• Rotation
• Mounting flange
• Shaft end
• Hydraulic connections
• Seal material
• Series number
• Single/front/intermediate configuration

VPPL-016PC5-R00S/20N and VPPM-029PC-R55S/10N000 are not interchangeable simply because both are variable axial-piston pumps. Their displacement, mounting interfaces, controls and pressure ratings are different.

For equivalent aftermarket products, 100% simulated working-condition testing can be used to validate displacement response, pressure regulation, rotation, leakage, noise and load stability before shipment.