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25VQ Series Vane Pump, 21 Ring Size, 7/8 Straight Keyed Shaft, Outlet in-Line with Outlet, CW Rotation

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Description & Features

The DANFOSS (Power Solutions II LLC) 25VQ Series Vane Pump is designed for high-pressure high-speed applications. The model 25VQ21A-1C20 features a 21 ring size and a 7/8 straight keyed shaft.

Optimized for oil and gas metal cutting dump truck wheel loader and plastic injection molding industries this pump ensures outstanding volumetric efficiency and a longer operational life. The inline outlet configuration with CW rotation enhances system integration.

Rated for a maximum pressure of 3000 PSI and a speed rating of 2500 RPM it includes a 2-bolt SAE B mounting flange and SAE 4-bolt flange ports (1-1/2" inlet 1" outlet). The use of Buna-N seal material ensures durability and reliability in various applications.

Built to meet demanding industry standards the 25VQ Series Vane Pump delivers consistent performance with a displacement of 4.12 cubic inches per revolution and a rated flow of 31.5 GPM.

Model Number: 25VQ21A-1C20

Supplier Part Number: 416457-3

Specifications

Brand
Vickers by Danfoss
Cartridge Type
20 Design
Dimensions
8.77 in L x 6.87 in W x 5.4 in H
Displacement io
4.12
Drive Shaft Type
Straight Keyed
Grp Specifications
2-Bolt SAE B Mounting Flanged, SAE 4-Bolt Flanged Port, 1-1/2 in Inlet x 1 in Outlet
Housing Material
Iron
Maximum Operating Pressure
3000 psi
Mounting Type
Flanged
Port Location
In-Line with Outlet
Rotation Direction
Clockwise
Seal Material
Buna-N
Series
25V Series
Shaft Size
7/8 in Dia
Vane Type
Fixed Displacement and Balanced

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Product Questions & Answers (3)

Question by: Danny G on Apr 21, 2025, 6:08 PM
got a setup that needs clockwise rotation and the outlet lined up, is this pump built that way or am i gonna be fighting it
Answer by: Customer Support on Apr 23, 2025, 6:50 AM
From the get-go this model is a CW rotation pump with the outlet port in-line with the inlet, so it matches a clockwise drive and an inline port layout without needing you to re-orient anything.
Question by: Dwight D on Aug 10, 2025, 10:36 AM
What kind of machine is this pump typically found on?
Answer by: Customer Support on Aug 11, 2025, 1:04 PM
Typically you'll see these vane pumps on equipment like dump trucks, wheel loaders, and plastic injection molding machines, along with oil and gas and metal cutting applications.
Question by: Johnny W on Jan 4, 2026, 10:47 AM
running this on a dump truck setup, does the 21 ring size give enough flow to keep up under load?
Answer by: Customer Support on Jan 5, 2026, 11:46 AM
At 31.5 GPM rated flow and a 3000 PSI max pressure rating, the 25VQ21A-1C20 carries enough output for demanding mobile applications like dump trucks. The 21 ring size drives a displacement of 4.12 cubic inches per revolution, so at operating speed you're getting solid, consistent flow. Keep the shaft speed at or below the 2500 RPM rating and the pump will hold up well under the kind of sustained load those applications put on a hydraulic system.

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