Metalworking encompasses several intricate processes, each designed to meet the increasing demands of modern applications. Since metalworking relies heavily on various machines and tooling to deliver results, productivity is extremely important.

Factors such as tooling life, differing surface finishes, and the rate of stock removal complicate most metal forming, cutting, and grinding operations. Manufacturers depend on their equipment, much like customers depend on your company; to achieve higher levels of productivity, industry professionals turn to metalworking fluid filtration.

Metalworking fluids facilitate the creation of higher quality products by reducing wear on workpieces, cutting tools, and grinding wheels and by providing constant temperatures on individual workpieces. These fluids can also wash away swarf produced by metalworking operations and prevent the occurrence of oxidation and corrosion on finished parts.

When utilizing metalworking fluids, vigilance is crucial, as various solid contaminants and unwanted oils (called tramp oils) can cause immense damage to coolant systems. Contaminants such as swarf, abrasive particles, metal flakes, and others promote the growth and spread of bacteria—proper filtration of metalworking fluids can resolve this issue.  

RT Engineering & Filtration Control Systems

RT Engineering has partnered with the experts of Filtration Control Systems to better support the metalworking processes of our customers. Filtration Control Systems utilizes several innovative filtration and separation techniques—each is designed reduce energy, labor, and disposal-related costs while enhancing overall productivity.

By uniting the separation practices of Filtration Control Systems with the industry-leading control technologies of RT Engineering, we help manufacturers get the most from their metalworking operations every time. Our most popular fluid filtration solution is the Sumpmaster Automatic Vacuum Filter.

The Sumpmaster Filter

Sumpmaster-SM3381The Sumpmaster Filter can greatly extend the life of system coolants and tooling by enabling greater filtration of solid contaminants and tramp oils. This solution handles both oil and water-based coolants to support individual machine sumps. Using durable, non-woven fabric media as the conveyor, heavy loads of swarf and dirt are removed from the system, promoting greater efficiency and finished results. 

The Sumpmaster is a highly economical solution that is available in both 8 GPM and 20 GPM models; each model is specially designed to preserve the existing coolant systems infrastructure while helping to avoid common defects produced by metalworking operations. This solution offers fully customizable options for any application.

In addition to Automatic Vacuum Filters, there are several other filtration solutions to choose from. Each solution has distinctive advantages and can suit application needs ranging from 8 to 400 GPM.

  • Gravity Bed Filters are used to automatically (and economically) filter coolants and metalworking fluids. The filter medium—a non-woven paper roll—is supported by a continuous mesh conveyor chain. As liquid levels rise, the conveyor advances to a fresh paper roll to continue filtration.

  • Magnetic Separators remove solid, ferrous material from coolants and metalworking fluids with rotating magnetic drums, eliminating the need for disposable filter media. The magnetic field of these separators can be extended by alternating steel disks and permanent magnets.

  • Deep Bed Filters are designed with spatial efficiency in mind, having a much smaller footprint compared to standard gravity bed filters. The sloped exit ramp of deep bed filters allows swarf to drain before it reaches the machine’s discharge roller—this is helpful for recovering swarf apart from the media.

  • Hydrocyclones are separators that can differentiate between solid and liquid densities, facilitating quicker natural settling; this effect also allows the usage of much smaller system tanks. Hydrocyclones separate fluids without the use of filter media or any moving parts.  

  • Hybrid Separation Systems draw from different filtration technologies to offer highly optimized fluid clarification. Common examples of Hybrid Systems include barrier filters with magnetic separators, settling tanks with hydrocyclone separators, and machine sump tanks with oil skimmers.  

  • Mist Collectors are essential for alleviating spatial issues within coolant and metalworking fluid systems. Increased coolant velocity causes more mist to generate and takes up space on or around machine tools; Mist Collectors free up this space by reintroducing collected coolant to the filtration system. 

RT Engineering and Filtration Control Systems have the expertise to provide high-quality filtration solutions for the most demanding modern applications. To learn about improving your metalworking fluid system, we proudly offer free consultation services. 

Other MWF Filtration Machines by RT Engineering

Model CVF12-100
12-40 square foot filtration area, 50-400 GPM, oil, emulsions, synthetics

The VF12 Automatic Vacuum Filter is configurable to a myriad of metalworking filtration applications and is ideal for central systems, machining cells, or standalone use. Filter areas may be designed for 12, 18, 24, 32, and 40 square feet and flow rates can range from 50 to 400 GPM for oil, emulsions, or synthetics. Suction is generated through centrifugal or eductor (venturi) pump-based systems. The VF12 uses a small regeneration tank which allows fluid to be processed and returned without interrupting service.  

Model VVF18-80
18 square foot filtration area, 80 GPM, oil, emulsions, synthetics

The VVF18-80 uses an 18 square foot filter with an eductor suction package. Ideal for aerated fluids and rated for 80 GPM, the VVF18-80 feeds filtered fluid into a large “clean tank” that sits atop the filter chassis and is cycled back into service. Gravity fed, low entry input allows for pit installation.

Model VVF24D-120S
48 square foot filtration area, 100-400 GPM, oil, emulsions, synthetics

The VVF24D-120S is a central oil filtration system that uses dual 24 square foot filters and a venturi eductor package that works effectively with aerated fluids. To handle continuous metalworking filtration, one filter can supply rated flow if the other is idle. RT designs and integrates variable speed filters and pumps with drives, HMI, and PLCs to allow for a range of operating modes including a self-cleaning mode that agitates sediments in the vacuum chambers.

Model VVF10LE-40
10 square foot filtration area, 40 GPM, oil, emulsions, synthetic

The VVF10LE-40 is a compact yet heavy-duty automatic vacuum filter featuring 10 square feet of filter area and rated for 40 GPM of grinding oil, emulsions, or synthetics. Internally, it also contains a 290 gallon clean tank and media roll. Its slim profile is ideal for a single machine or machining cells where space is limited.

Model E-VAC
10-40 GPM, oils, emulsions

For an economical, efficient filtration system, RT provides the E-VAC. Three size options range from 10 to 40 GPM for oils or emulsions. A single pump generates vacuum suction and supplies fluid to the machine tool. Transfer tanks and pumps are eliminated with low coolant entry height. Though compact, this unit can handle carbide grinding, honing and superfinishing.


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