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25VQ Series Vane Pump, 21 Ring Size, 13 Tooth SAE B Splined Shaft, Outlet Opposite Outlet, CW Rotation

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Description & Features

Ideal for high-pressure, high-speed applications, the 25VQ Series Vane Pump delivers outstanding volumetric efficiency and longevity. Designed with a 21 ring size and a 13 tooth SAE B splined shaft, this pump is engineered for demanding environments such as oil and gas, metal cutting, and heavy machinery like dump trucks and wheel loaders. The clockwise rotation and opposite outlet port location further enhance its versatility in industrial settings.

This pump operates efficiently with a maximum pressure of 3000 PSI and a rated flow of 31.5 GPM, supported by its robust construction featuring a 2-bolt SAE B mounting flange and SAE 4-bolt flange ports (1-1/2" inlet, 1" outlet). The Buna-N seal material ensures durability under rigorous conditions. Manufactured by Danfoss Power Solutions, this pump exemplifies quality and reliability for specialized hydraulic systems.

SKU: 421477-1

Supplier Part Number (MPN): 421477-1

Alternate Part Numbers: 25VQ21A11A20

Specifications

Application
Oil and Gas, Metal Cutting, Dump Truck, Wheel Loader, Plastic Injection Molding
Displacement
4.12
Displacement
4.12
Brand
DANFOSS POWER SOLUTIONS II LLC (VICKERS)
Brand
Danfoss Power Solutions
Pack Size
1.00
UOM
EA
Features
Longer operating life|Oustanding volumetric efficiency|Built for high-pressure, high-speed applications
Maximum Pressure
3000
Maximum Pressure
3000
Port Location
Opposite Outlet
Rated Flow
31.50
Rated Flow
31.5
Ring Size
21
Ring Size
21
Rotation
CW
Seal Material
Buna-N
Series
25VQ
Shaft
13 Tooth SAE B Splined
Shaft
13 Tooth SAE B Splined
Special Features
None
Speed Rating
2500 RPM
Speed Rating
2500 RPM
Supplier Part Number
421477-1
Alternate Part Numbers
Alternate Part Number 25VQ21A11A20
Product Weight
32.00 lbs

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Product Questions & Answers (2)

Question by: Marvin T on May 1, 2025, 2:02 PM
What kind of machinery is this pump good for?
Answer by: Customer Support on May 3, 2025, 1:15 PM
This 25VQ series vane pump works well in heavy machinery like dump trucks and wheel loaders, along with oil and gas applications and metal cutting. It's also used in plastic injection molding equipment.
Question by: Ross B on Jan 26, 2026, 6:34 PM
Got a dump truck running a 25VQ pump now and the shaft wore out on me. This one's got the 13 tooth SAE B splined shaft, right? Just want to make sure it's a straight swap before I pull the trigger.
Answer by: Customer Support on Jan 28, 2026, 1:06 PM
Yeah, the shaft on this one is a 13 tooth SAE B splined configuration, so if your current pump uses that same shaft spec, you're looking at a direct match on that end. The mounting is a 2-bolt SAE B flange, and the ports are SAE 4-bolt flange style with a 1-1/2 inch inlet and a 1 inch outlet. Worth confirming those port sizes line up with your existing hydraulic connections before ordering, but the shaft itself checks out for what you're describing.