Robco Expert

  3 Important Things to Know About Oil Oxidation François Le Breux - VP Technical Support Robco Of the factors (friction, corrosion, oxidation) that most affect the performance of a lubricant and, therefore, of oxidation equipment is the least known.  Oxidation is the process in which oil changes due to the polymerization of the organic molecules that compose it. As it oxidizes, the properties of the lubricant degrade rapidly and irreversibly. 1 - The following factors accelerate oxidation: Copper that comes from the wear off certain bearings Ferrous (or other) mixtures suspended in oil Water And the temperature (oil life halves every 18 ° F above 140 ° F with mineral-based oil) 2 - In addition, by oxidizing: The acidity of the oil increases Viscosity also increases The number of insoluble particles increases Sediment deposits form 3 - Which results in: Restriction of oil circulation in the system Blocking filters Increased friction Temperature increase Increased corros...

  6  Things to know and do  before and after making a switch from one grease to another Thomas Cipriani – Product Specialist at Robco Verify what the OEM specifications state for type and NLGI grade of grease that you should be using in your application. Verify if what you are using meets those specifications Find suitable grease options that meet the specifications in order to switch to the proper grease option. Compare the suitable greases by comparing their results in the key grease tests; such as Timken OK load, 4-Ball EP Load-wear index, 4-Ball EP Weld Point, 4-Ball Wear-Scar Diameter, Drop Point, Pour Point, Operating Temperature capability, Water Washout Test Result, etc... Once you have selected the grease you would like to switch with verify if it is compatible with the one in your system to be sure on how much you must purge the system. The worst thing you can do is put one grease on top of ...

  5 REASONS TO USE PREFORMED PACKING RING SETS IN PUMPS Jean Melancon In centrifugal pump sealing you need to select which packing would best suit your equipment and application, and in what order to install each packing length, assuming your maintenance worker will remember and respect the installation order and steps involved. Measuring packing lengths, cutting them to the correct size and allowing for compression expansion can be difficult. There’s always material waste as a result of error and achieving the required angle cut. Also, giving each packing length a shape around the shaft and making sure the shape is maintained during insertion requires time and patience. Then, unless the packing is pre-densified, exerted compression may not be ideal and will result in reduced, inadequate sealability. But preformed packing ring sets are custom made to fit your equipment and will incorporate the best configuration of packing types and spacers to suit your application. HERE ARE 5 R...

  5  important things to do  when replacing compression packing on a pump: By Jocelyn Vachon – Fluid Sealing Specialist and Packing Guru If you’re not doing these 5 things, you are increasing the chances of pump failure. Visual inspection of the packing rings:  As you remove the worn-out packing rings, inspect for unusual wear: this will reveal if a faulty element is causing damage and early failure (impregnated abrasive particles on the packing, torn areas, excessive wear on particular surfaces, over-compression, etc. Inspect equipment  for   excessive wear on the sleeve/shaft, excessive shaft eccentricity run-out, plugged water-line or limited pressure, bearings, etc. Install packing that meets the performance requirements : operating temperature, shaft speed, chemistry and potential abrasion. Install one packing ring at a time:  make sure packing is the right size (it should fit reasonably tight) and do not insert a spiral of packing into the stuffi...