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

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Description & Features

This 45VQ Series Vane Pump from Danfoss Power Solutions is designed for demanding applications, including those in oil and gas, metal cutting, plastic injection molding, and mobile equipment such as dump trucks and wheel loaders. Built for high-pressure and high-speed usage, this vane pump offers long operating life and outstanding volumetric efficiency.

This model, 45VQ50A1A20, features a 50 ring size, a 1-1/4 straight keyed shaft, and CW rotation. It utilizes a 2-Bolt SAE C mounting flange and SAE 4-Bolt Flange Ports, including a 3" inlet and 1-1/2" outlet. The outlet is positioned opposite the inlet. It offers a rated flow of 77.14 GPM at a speed rating of 2200 RPM and a maximum pressure of 2500 PSI.

SKU: 421966-1

Supplier Part Number (MPN): 421966-1

Alternate Part Numbers: 45VQ50A1A20

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
Opposite 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
421966-1
Alternate Part Numbers
Alternate Part Number 45VQ50A1A20, Alternate Part Number MINO-00900H61370
Product Weight
75.00 lbs

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Product Questions & Answers (2)

Question by: Lee W on May 22, 2025, 11:41 AM
got a 45VQ50A1A20 on the machine now. is this SKU 421966-1 the same pump or am I askin for trouble
Answer by: Customer Support on May 23, 2025, 2:59 PM
Match-up looks straightforward here. SKU 421966-1 is listed as Danfoss Power Solutions 45VQ series with alternate part number 45VQ50A1A20, and it keeps the key identifiers: 50 ring size, 1-1/4 straight keyed shaft, CW rotation, 2-bolt SAE C mount, and SAE 4-bolt flange ports with a 3 inch inlet and 1-1/2 inch outlet.
Question by: Lee C on Feb 9, 2026, 7:52 PM
got a dump truck running a 45VQ setup right now and need to know if this one'll keep up -- what's the flow rate on this pump at operating speed?
Answer by: Customer Support on Feb 11, 2026, 8:35 AM
At 2200 RPM, this pump puts out 77.14 GPM. For dump truck hydraulics, that's a solid output, and the 45VQ series is actually listed as a direct fit for that kind of mobile equipment work. Pair that with the 2500 PSI max pressure rating and you've got plenty of muscle for lifting and dumping cycles.