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Arimitsu 521R Floating Plunger Pump

Mfr. Model #:
63078 / A8033
KR Part #:
0.50 lbs
Usually Ships in 4 Weeks
Now Only!
The Arimitsu 521R plunger pump operates quietly for applications where the noise level should be minimal. This floating pump is engineered with noise reduction in mind keeping the pump quiet. Long life and durability are guaranteed by selection of materials used in parts for the Arimitsu 521R floating pump.
Freight Only

Freight Only


Technical Specifications

Crankcase Capacity: 21 ounce
Inlet Port: 1/2 inch
Max GPM: 4
Max Temperature: 170 degrees F
Shaft Diameter: 28 millimeter
Max PSI: 2500
RPM: 1800
Outlet Port: 3/8 inch

Product Description

Floating Plunger Pump Arimitsu 521R

Arimitsu 521R floating plunger pumps features oversized crankshaft bearings extend the pumps life and enables quiet operation. Precision machining and balanced flow crankcase design assists the pumps systems in quiet operation. Smooth liquid flow is facilitated by Triplex pumps inside the 521R. The pump is liquid cooled and features low drag seals to provide long life, improved suction enabling this pump to run dry longer and operate at a higher efficiency. Maintenance and repairs require no special tools making these tasks much less cumbersome. 


  • Unique mounting technology increases life and decreases noise (pat. pending) 
  • Triplex pumps provide smooth liquid flow 
  • Liquid cooled, low drag seals provide long life, improved suction, higher efficiency and longer dry running without damage 
  • Balanced flow crankcase design and precision machining ensures uniform lubrication and quiet operation 
  • Manifold is designed and machined to guarantee superior fluid flow 
  • Zero-clearance exclusionary seals protect crankcase


  • 100% stainless steel valve assemblies deliver greater temperature and chemical handling abilities 
  • Precision ground ceramic plungers utilize a proprietary material blend for long life and increased thermal shock resistance 
  • Forged brass manifolds offer strength and corrosion resistance 
  • Proprietary, proven seal blend maximizes life and increases maintenance intervals 
  • Oversized crankshaft bearings for long life and quiet operation


  • No special tools required for repair or maintenance 
  • Fluid end is easily serviced without entering crankcase 
  • Easy access seal case and valve assemblies 
  • Seals require no adjustment 

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