The L-Series Disk Skimmer was our first skimmer, and was designed to use the smallest footprint possible. Disk skimmers have been around for many years, and the L-Series is a favorite among customers, particularly those on a very tight budget.
We developed the GS-Series Smart Disk Skimmer to include a mini oil/water separator, called the Diverter. Earlier we discussed types of coolant and how each has its own percentage of base oils, which are also attracted to mechanical skimmers. The Diverter will re-separate this coolant and ‘divert” it back to the sump, reducing coolant waste. The Smart Disk Skimmer is a new favorite among disk skimmer lovers, as it is also very economical.
Both disk skimmers are offered in various sizes and can be equipped with a continuous-duty motor, even if not a standard.
Zebra is proud to offer a lifetime warranty on replacement disks and wipers, including those purchased as replacements for other brand units.
The Zebra Belt Skimmer uses a belt on a pulley system to skim oil. This traditional technology allows the unit to fit into areas where disk skimmers cannot. Belt skimmers are also suitable when skimming oil from drums of coolant, or other applications where there is a fair distance between the mounting point and the fluid level. Belts are offered in various widths and reaches to tackle almost any coolant job. A lifetime warranty is offered on replacement wipers for this unit as well.
The Diverter is available as an accessory, and is always recommended for coolant applications where there is room for it.
Sidewinder Tube Skimmer
Topic 121 introduced the ZVA Sidewinder Tube Skimmer, which uses a tube that is driven by a gear system. Although tubing has long been used in larger industrial and wastewater applications, Zebra was the first to use this technology in machine sumps, as it is flexible enough to overcome the problem of very limited sump access. Many machine builders are incorporating coolant tanks underneath the machine to save floor space, and this is where the Sidewinder works better than any other mechanical skimmer. Sidewinder is a very popular tube skimmer, yet there are many customers who have not yet been introduced to it. It is also offered the unit with long tubes to skim oil from almost anywhere.
The Diverter is also available for use with Sidewinder. However, due to tank access some customers are unable to use the Diverter. Zebra offers slower motors on Sidewinder to help reduce coolant loss in these situations.
All of our mechanical skimmer technologies will handle the daily oil introduced by machine ways and hydraulic systems. Coolant loss can be minimized by selecting a skimmer which has exactly the oil removal capacity needed, as well as incorporating a Diverter whenever possible.
We recommend that any skimmer, whether or not it has a fan-cooled motor, be timed to run only as long as needed. This will increase motor longevity. If possible, the timer should be set to start the skimmer when the sump has had a few minutes to settle, after oils have a chance to rise to the surface.
Selecting a Mechanical Skimmer
Practicality dictates that “what fits” is the place to start when selecting a skimmer for an application. Whenever possible, the skimmer should skim from the area in the tank where oil naturally collects. If this area has plenty of access, a Zebra Disk Skimmer may be the cheapest option. If there’s somewhat limited access, then a Zebra Belt Skimmer may be better. For machines with very tight access, particularly overhead, the Sidewinder will easily ‘snake’ in there to get the job done.
How Much Oil Removal is Needed?
Next, consider the skimmer’s oil removal capacity. In general, all of Zebra’s skimmers will have appropriate, even extra, oil removal capacity for applications at the sump level. Large sumps or central tanks may need a closer look to determine how much oil removal capacity is required.