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R.A. Ross & Associates is a full service distributor serving Kentucky, Indiana and Ohio for over 25 years.

Custom Packages

We specialize in Custom packages…



Gas Compressors

Complete Repair Service

Factory trained and authorized service and repair on all makes and models of pumps, blowers and gas compressors.

Thousands of Items In Stock

Thousands of items in stock in our Louisville warehouse.

Award-winning Customer Service

R.A. Ross & Associates has been recognized many times over the past 25 years by the companies we represent for providing outstanding customer service to our mutual customer base. Give us a call and we will show you why!

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Welcome to R.A. Ross and Associates, Inc.

Why R. A. Ross?

  • Engineer based company
  • Continuing factory education
  • Knowledge
  • Team-based approach
  • Ultra-fast response policy
  • New equipment
  • Rebuilt equipment
  • Repairs
  • Parts/parts kits
  • Custom built solutions


For exact model and size information, click here for FREE Tuthill Kinney VBXpert sizing software.

How to take control of what you pump

Here is a product that will let you completely control what you process! The ARO Controller and electronic interface pumps allow you to set precise fluid amounts, then push a button and step away and let ARO take control. Set it and forget it!

  • Set control and walk away
  • Precision fluid management
  • Operates in hazardous environments

“With the ARO controller my spillage has gone down, and the time it takes to fill a container has lowered”

Greg Blanchard
Owner, Pro Chem Cleaning Systems

Click below to watch a video of how the ARO controller has helped Pro Chem Cleaning Systems solve overfill and underfill problems.

Perfect for:

  • Paints aro-pump
  • Detergents
  • Chemicals 
  • Coatings
  • Ink 
  • Water/wastewater

The ARO Electronic Interface Pump is an air-operated diaphragm pump that provide accurate, electronically controlled dosing.

  • Configurable for use with the ARO Controller
  • Built-in solenoid control seamlessly integrates with other electronic components
  • Internal cycle counter and end-of-stroke pressure signals track end-of- stroke feedback and pump data
  • Leak detection option detects diaphragm failure to help reduce costly production downtime
  • Factory-installed cycle counter and leak detection kits
  • Five-year warranty

Introducing Blackmer's new screw pumps for those needing extremely high or extremely low capabilities.


Available in three lines-Twin screw with timing gears; Twin screw without timing gears, and Triple screw

Blackmer’s Series S Pumps Offer:


  • Higher flows (to 11,000 GPM)
  • Higher pressures (to 2,250 PSI)
  • Higher viscosities (to 200,000 CST)
  • Higher suction lifts (to 3 ft NPSH)
  • Higher tolerance for entrained air and other gases (multi-phase model available)
  • Higher speeds (to 3,600 RPM)
  • Higher tolerance to contamination
  • Higher gas content to 97% gas transfer


  • Lower shear
  • Lower NPSH
  • Lower internal velocities
  • Lower churning or foaming
  • Lower mechanical vibration
  • Lower noise
  • Lower pulsations (consistent flow)
  • Lower maintenance


  • Crude oil
  • Asphalt
  • Kerosene
  • Diesel
  • Lubricating oil
  • Tank, terminals and refineries (Downstream applications)
  • Cargo pumps and systems
  • Chemicals
  • Petrochemicals
  • Marine
  • Upstream and midstream pumping
  • Multiphase pumping


  • Self-priming
  • Compact construction
  • Simple to replace pumping elements
  • Easy maintenance
  • Dry running possible
  • Constant flow on varying pressures and volumes
  • No external cooling required
  • Contact-free intermeshing screws
  • Able to handle non-dedicated fluids or fluids with changing characteristics
  • ATEX-certified for use in explosive or dangerous environments

For more information on these or any other special application pumps, please contact us.
We know how to handle whatever you process.

How we saved an auto parts supplier hundreds of thousands of dollars

Chrome plating is a long, involved process and typically starts with degreasing, rinsing and cleaning, tedious polishing, then buffing, then acid dipping (etching), applying a metal catalyst then nickel and/or copper plating (many times calling for multiple layers) prior to the chrome plating itself. Typically the parts are rinsed in between each process. 

partsAs you can imagine, any particulate will show up as a defect and can’t be tolerated.

One auto parts manufacturer was encountering high costs and a severe problem with product reject rate. The rejects were due to par­ticulate from their plating bath causing blemishes in the plating layer. The competitive bath filters were just not filtering their plating solutions properly and consistently.

We immediately involved one of our premium filter suppliers, Pentair Engineered Filtration. Pentair proved to be the perfect choice to develop the proper filter solution.



• Hundreds of thousands of dollars were saved due to lower scrap rate.

• The bottom line result was a competitive product with exceptional dirt holding capacities, precise filtration ratings, repeatable performance, low pressure drops, and high efficiencies. 

Put our experience and knowledge to work to­ward solving your problems. Our solutions may save you a lot of time, money and headaches.

(Complete details of this case study can be found in the link “Problems Solved” under the tab “Why Us.”)



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Custom Packages

Custom mechanical seal arrangements

Custom Mechanical Seal Arrangements

Refrigerated Gas Recovery Packages


Blower Packages


Pump Packages



2231A Ampere Drive
Louisville, Kentucky 40299
(502) 267-8677 | (800) 489-8677
(502) 266-7928 Fax


501 S. Ninth Street
Suite #102
Noblesville, Indiana 46060
(800) 489-8677 (Toll-free)
(502) 266-7928 Fax

Falling Waters

102 Left Street
Falling Waters WV
(800) 489-8677 (Toll-free)
(502) 266-7928 Fax


3375 Trace Creek Rd.
Mayfield, Kentucky 42066
(800) 489-8677 (Toll-free)
(502) 266-7928 Fax

Batavia (Cincinnati)

233 E. Main Street, Suite 6
Batavia, OH 45103
800 489-8677 Toll Free

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