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VICKERS 4525VQ50A21 1AA20

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Description & Features

The Eaton Vickers 4525VQ50A21 1AA20 vane pump is designed for demanding applications, including plastics machinery, press machines, die casting, machine tools, and test equipment. It excels in primary metal, pulp & paper, wood processing, oil & gas, marine, and general industrial settings.

This Vickers by Danfoss / Eaton VQ(H) Series Vane Pump features cast iron construction and Buna-N seals, ensuring durability and reliability. Benefits include a longer operating life, outstanding volumetric efficiency, and suitability for high-pressure, high-speed applications. With a flow rate of 106.99496448 litres per minute and a product width of 8.38 inches, it offers robust performance.

SKU: 433735-1

Supplier Part Number (MPN): 433735-1

Specifications

Brand
Vickers by Danfoss
Cartridge Type
20 Design
Dimensions
15.43 in L x 8.38 in W x 6.53 in H
Displacement
9.9 cu-in Shaft, 4.1 cu-in Cover
Drive Shaft Type
Straight Keyed
Flow Rate
50 gpm Shaft, 21 gpm Cover
Housing Material
Iron
Maximum Operating Pressure
2500 psi
Mounting Type
4-Bolt Flanged
Outlet Size
1 in, 1-1/2 in
Rotation Direction
Counterclockwise
Seal Material
Buna-N
Series
4525 Series
Vane Type
Fixed Displacement and Balanced

Product Questions & Answers (3)

Question by: Steve H on Nov 24, 2025, 2:47 PM
got a press machine that runs pretty hard, is this 4525VQ pump meant for high pressure and higher speeds?
Answer by: Customer Support on Nov 25, 2025, 3:42 PM
Built for high-pressure, high-speed applications, the 4525VQ series vane pump is a solid match for demanding equipment like press machines, die casting, and machine tools. It is also called out for outstanding volumetric efficiency, which is helpful when you are trying to keep performance consistent under load.
Question by: Neal G on Dec 6, 2025, 4:32 PM
Running a press machine setup and need something that'll hold up under high pressure without giving out on us after a few months. This the right kind of pump for that?
Answer by: Customer Support on Dec 8, 2025, 6:40 AM
Cast iron housing and Buna-N seals make this pump a solid fit for exactly that kind of work. The VQ series was built around high-pressure, high-speed applications, so press machine duty is right in its wheelhouse. Volumetric efficiency is one of the stronger selling points on this series, which matters a lot when you're pushing a press and need consistent flow without drop-off.
Question by: Gene H on Sep 7, 2025, 9:06 PM
Is this pump okay for running constantly, like in a factory setting?
Answer by: Customer Support on Sep 9, 2025, 12:07 PM
It's built for high-pressure, high-speed applications, so continuous use shouldn't be a problem as long as you're within the specified operating conditions.

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