The R. A. Ross team’s creative skills solve complex problem with innovative solution

Situation/Solution: A large oil company requested a Blackmer pump that would be used for “proving” gasoline, ethanol, diesel and biodiesel at several of their facilities. The specifications were listed as seen in the chart to the left.

The Ductile Iron Blackmer X4B 4” Sliding Vane Pump with Carbon vs. Iron. Viton mechanical seals met the specifications ideally running at 57% of maximum speed (which would give them long service life). The pumps would be coupled to Blackmer 5.77 to 1 HRB helical gear reducers with a 2.24 to 1 service factor for cool running operation and long reducer life. A 15 HP motor gave them more than sufficient safety margin.

Our job is to help keep you up and running.

R. A. Ross & Associates offers customers over 100 years combined experience with pumps and repairs.



Blackmer X4B Sliding Vane Pump assembly:
•Ductile iron construction
•Duravane vanes
•Viton o-rings
•Carbon vs. Iron mechanical seals
•Standard internal relive valve w/35-50psi spring
•4” NPT flange connections
•HRB 5.77:1 reducer to produce approx. 303rpm w/1750rpm motor
•15hp 3/60/230-460/1750 rpm Explosion Proof motor
•Formed steel base plate, couplings and guards

Trailer packing and control panel:
•5’ x 8’ 2990# capacity single axle utility trailer w/DOT approved lighting
•Tongue jack w/foot plate / tongue accepts 2” ball
•Jack on each rear corner for leveling/stability
•12ga. Treadplate steel floor
•2 – Wheel chock set and tool box w/lid and closure for storage
•Trailer dolly for movement of package by hand



Our client is very satisfied with not only our solution, but with the fact that we finished the project on time and under budget, and has ordered additional units from us.

Blackmer pumps are chosen in many cases as they are much “greener” (more energy efficient) than internal gear pumps. Blackmer vane pumps maintain their efficiency and flow even as the vanes wear where gear pumps start
losing flow and energy with any wear that occurs. The chart below shows the difference:

Blackmer X-Sliding Vane Pump typical applications:
Clean, non-corrosive industrial liquids and petroleum products, including fuel oils, lube oils, jet fuels, gasoline, edible oils, and a variety of solvents and thinners such as esters, ketones, naphtha’s, ethers, amines, aromatics, alcohol’s, terpenes, glycol’s and many other similar liquids.

Features and Benefits:
• Unique sliding-vane pump design self-adjusts for wear to maintain flow rates.
• Excellent self-priming and dry run capabilities.
• Blackmer mechanical seal and ball bearing construction provide maximum reliability.
• Symmetrical bearing support assures even loading and wear for long life.
• Adjustable relief valve protects pump against excessive pressures.
• External ball bearings are isolated from pumpage by mechanical seals to maximize bearing life and minimize contamination risk.
•Easy maintenance: vanes can be easily replaced without removing the pump from the piping system.

How Blackmer’s sliding vane action works

Blackmer’s positive displacement rotary pumps utilizing their unique sliding vane design offers the best combined characteristics of sustained high level performance, energy efficiency, trouble-free operation and low maintenance cost. Also, the high suction lift capability of these pumps makes them especially suitable for pumping from underground tanks, bulk plant service and aircraft refueling


Specially designed and built mobile Blackmer pump solution

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