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45VQ Series Vane Pump, 50 Ring Size, 1-1/4 Straight Keyed Shaft, Outlet 90 deg CW from Outlet, CW Rotation

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Description & Features

Rated for continuous duty at up to 2500 PSI and 2200 RPM, the 45VQ Series Vane Pump is built for demanding high-pressure, high-speed hydraulic applications across metal cutting, plastic injection molding, dump truck, wheel loader, and oil and gas equipment. The 50 ring size delivers a rated flow of 77.14 GPM, making it well suited for systems requiring high-volume output at sustained pressures.

This unit features a 1-1/4 straight keyed shaft with clockwise rotation and an inlet port positioned 90 degrees clockwise from the outlet. Mounting is via a 2-bolt SAE C flange, with SAE 4-bolt flange ports sized at 3" inlet and 1-1/2" outlet. Manufactured under the Eaton Vickers brand, now supported by Danfoss Power Solutions, the 45VQ Series is recognized for strong volumetric efficiency and extended service life in industrial hydraulic circuits.

SKU: 421966-2

Supplier Part Number (MPN): 421966-2

Alternate Part Numbers: 45VQ50A1B20

Specifications

Application
Oil and Gas, Metal Cutting, Dump Truck, Wheel Loader, Plastic Injection Molding
Displacement
9.90
Displacement
9.9
Brand
Danfoss (Power Solutions II LLC)
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
2500
Maximum Pressure
2500
Port Location
90 deg CW from Outlet
Rated Flow
77.14
Rated Flow
77.14
Ring Size
50
Ring Size
50
Rotation
CW
Seal Material
None
Series
45VQ
Shaft
1-1/4 Straight Keyed
Shaft
1-1/4 Straight Keyed
Special Features
None
Speed Rating
2200 RPM
Speed Rating
2200 RPM
Supplier Part Number
421966-2
Alternate Part Numbers
Alternate Part Number 45VQ50A1B20, Alternate Part Number MINO-00900X56271
Product Weight
75.00 lbs

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Product Questions & Answers (3)

Question by: Rod R on Jan 26, 2026, 9:06 AM
What kind of machines would this pump be good for? I'm thinkin' about using it on a dump truck.
Answer by: Customer Support on Jan 27, 2026, 6:26 PM
This 45VQ series vane pump is listed as being suitable for dump trucks, along with metal cutting, oil and gas applications, wheel loaders, and plastic injection molding equipment.
Question by: Ray F on May 20, 2025, 6:16 PM
got a 45VQ50A1B20 pump on the machine now, is this SKU the same one with clockwise rotation?
Answer by: Customer Support on May 21, 2025, 6:59 PM
Match-up is straightforward here because the model number is called out as 45VQ50A1B20 and the rotation is CW, so it lines up with a clockwise rotating 45VQ, ring size 50 pump.
Question by: Shawn A on Oct 26, 2025, 6:50 PM
Running a wheel loader application and need to confirm flow before I order. What's the rated output on this pump?
Answer by: Customer Support on Oct 28, 2025, 7:59 AM
At 2200 RPM, this pump is rated for 77.14 GPM. That's a solid flow figure for wheel loader work and puts it well within range for high-demand mobile hydraulic circuits. The 50 ring size and 9.9 cubic inch displacement are what get you there, so if your system is sized around that flow range, you're looking at the right pump.