4535V50A25-1AA22R Vickers Double Vane Pump 162/97 cc

Product Overview

The 4535V50A25-1AA22R is a Vickers V Series industrial double fixed-displacement vane pump, now supported within the Vickers by Danfoss product portfolio.

Danfoss describes the V Series as an industrial vane-pump range featuring an innovative intra-vane cartridge design, low noise, durability, high volumetric efficiency and serviceability. The 4535V is a double-pump configuration combining a 45V frame shaft-end section with a 35V frame cover-end section.

According to the official V Series model-code structure:

• 4535V: 4535V double-pump frame
• 50: Shaft-end displacement code, 162 cm³/rev
• A: SAE 4-bolt flange port connection
• 25: Cover-end displacement code, 81 cm³/rev
• 1: Standard straight keyed shaft
• AA: Port-orientation code
• 22: Design 22
• R: Clockwise rotation when viewed from the shaft end

The complete model number is therefore critical for retrofit engineering. The 4535V family contains numerous combinations of displacement, shaft, port orientation, seal and rotation configurations, and these should not be mixed between different model numbers.

Technical Specifications

Primary Model: 4535V50A25-1AA22R

• Brand: Vickers by Danfoss
• Series: V Series
• Model: 4535V50A25-1AA22R
• Pump Type: Industrial double fixed-displacement vane pump
• Architecture: Intra-vane cartridge design
• Shaft-End Frame: 45V
• Cover-End Frame: 35V
• Shaft-End Displacement: 162 cm³/rev
• Cover-End Displacement: 81 cm³/rev
• Combined Geometric Displacement: 243 cm³/rev, calculated from the two published section displacements
• Rated / Maximum Speed: 1800 r/min
• Maximum Continuous Working Pressure: 172 bar (2500 psi)
• Transient Pressure: The V Series technical data allows a transient pressure 10% above the continuous rating for 0.5 seconds or less. For a 172-bar continuous rating, this corresponds to a calculated 189.2 bar transient value.
• Minimum Speed: 600 r/min
• Control: Fixed displacement
• Port Connection: A — SAE 4-bolt flange
• Shaft: 1 — Standard straight keyed shaft
• Port Orientation: AA
• Rotation: R — Clockwise, viewed from shaft end
• Design: 22
• Housing Material: Cast iron
• Approximate Weight: 53.5 kg (118 lb)
• Approximate Dimensions: 185.7 × 453.1 × 212.9 mm (7.31 × 17.84 × 8.38 in)

Other 4535V Models in the Requested Range

4535V66A38-86AD20-260

Verified published data identifies:

• Shaft-End Displacement: 193 cm³/rev
• Cover-End Displacement: 121 cm³/rev
• Shaft: 86 straight keyed
• Rotation: Right / clockwise
• Cover-End Port Configuration: AD
• Seal: Buna-N
• Maximum Working Pressure: 172 bar
• Housing: Cast iron
• Weight: 118 lb / 53.5 kg

The detailed interpretation of the version/configuration portions 20 and 260 should be taken from the corresponding complete product drawing rather than inferred.

4535V60A32-86CC22R

The exact current Danfoss PowerSource page was not located during this verification, so unsupported third-party configuration details are intentionally not presented as official data.

The official V Series model-code system confirms:

• 60: Shaft-end displacement 193 cm³/rev
• 32: Cover-end displacement 97 cm³/rev
• 86: Standard straight keyed shaft
• CC: Outlet 1 and Outlet 2 inline with the inlet
• 22: Design 22
• R: Clockwise rotation.

Key Technical Advantages

1. Intra-Vane Cartridge Design

Danfoss identifies the intra-vane cartridge design as a defining V Series technology. The cartridge architecture supports controlled internal clearances and stable hydraulic operation while contributing to low noise and strong volumetric performance.

2. Hydraulic Balancing

The V Series incorporates hydraulic balancing designed to reduce internally induced radial shaft and bearing loads, supporting longer service life under industrial operating conditions.

3. Twelve-Vane System

Danfoss states that the V Series uses a 12-vane system that produces low-amplitude flow pulsations, contributing to lower overall hydraulic-system noise.

4. Efficient Double-Pump Packaging

The 4535V combines a 45V and 35V section in one double-pump package. Danfoss states that double-pump configurations can save installation space and cost while reducing the need for double-shaft electric motors or additional drive couplings.

5. High Flow Capacity

For 4535V50A25-1AA22R:

P1 = 162 cm³/rev
P2 = 81 cm³/rev

At 1800 r/min, the theoretical geometric flow is approximately:

• Shaft-end section: 291.6 L/min
• Cover-end section: 145.8 L/min
• Combined theoretical flow: 437.4 L/min

These are calculated theoretical values. Actual flow depends on volumetric efficiency, pressure, viscosity and speed. Danfoss states that V Series volumetric efficiency can exceed 90%, but actual field performance remains application dependent.

6. Factory-Tested Cartridge Service

Danfoss describes its cartridge kits as factory tested and designed for fast service. The cartridge is independent of the drive shaft, allowing flow-capacity changes and servicing without necessarily removing the complete pump from its mounting.

7. Standardized Industrial Connections

The primary model uses SAE 4-bolt flange port connections and a standard keyed shaft, providing a practical interface for OEM equipment and aftermarket replacement applications.

Application Areas

Danfoss lists the V Series for applications including:

• Press machines
• Aerial booms
• Primary metals
• Industrial power units
• Material handling machines
• Plastic injection molding machines

Published application information also covers:

• Die-casting equipment
• Machine tools
• Test equipment
• Pulp and paper machinery
• Wood-processing equipment
• Oil and gas equipment
• Marine systems
• General industrial machinery

The large-displacement 4535V double-pump configuration is especially suitable for industrial systems requiring high hydraulic flow and multiple hydraulic circuits from one mechanical drive.

Expert Maintenance Tips

1. Verify Both Pump Sections

For 4535V50A25-1AA22R, always identify both sections separately:

162 cm³/rev + 81 cm³/rev

Pressure, flow and input-power calculations must be performed for each section.

2. Confirm Rotation

The R suffix means clockwise rotation viewed from the shaft end. Danfoss’s official code defines:

• L = counterclockwise
• R = clockwise

Verify motor rotation before commissioning.

3. Treat 172 bar as the Continuous Limit

For the 4535V configuration in the official technical data, 172 bar is the continuous pressure rating. The transient allowance is a short-duration condition and should never be treated as a continuous operating target.

4. Protect the Inlet Circuit

The official V Series inlet-pressure specification gives a minimum of −0.17 bar (5 in Hg) for anti-wear oil, −0.10 bar (3 in Hg) for water-containing fluids and phosphate esters, and a maximum inlet pressure of 1.4 bar (20 psi).

The suction circuit should therefore be designed to minimize excessive restriction and aeration.

5. Maintain Accurate Shaft Alignment

Check:

• Coupling concentricity
• Axial movement
• Key and keyway fit
• Mounting-face flatness
• Drive-support rigidity

Unnecessary radial or axial loads can reduce shaft and bearing life.

6. Match Replacement Cartridges Precisely

Danfoss emphasizes factory-tested cartridge kits. Replacement cartridges should match the original frame size, displacement code, shaft arrangement, rotation and seal configuration.