Rotary Vacuum Drum Filtration System
The Rotary Vacuum Drum Filter uses a permanently rotating cylinder, built with Filtra-Systems’ PermaFlow technology or wedge wire, as the filtration septum.
The rotary drum filter removes contaminants from metalworking fluids and runs a fully automated backwash cycle, so the system needs no separate clean tank and sends less waste to the landfill.
We’ve engineered rotary drum filtration equipment for more than 40 years, with thousands of systems installed across 37 countries and 63+ patents behind our filtration technology, including the patented backwash and cylinder design built into every rotary vacuum drum filter.
Perma-Flow Modular Micro-Screen Rotary Drum Filter
The Perma-Flow is a rotary indexing micro-screen vacuum filter built for machining applications, and the drum filter system uses strainer-type separation with a pressurized incremental backwash and a scraper for positive cake removal and conveyance, filtering below ten microns.
The modular screen design supports parallel operations on large systems and gives you full redundancy.
How the Automatic Backwash Rotary Drum Filter Cycle Works
The PermaVac uses a patented vacuum-placed drum inside the main filter tank to form a cake on the outer surface, without conventional paper media.
Once the cake reaches a set limit, the automatic backwash rotary drum filter cycle starts and keeps running while the machine operates. Heavy particulates settle at the bottom of the tank and discharge through a single point for easy removal.
Rotary Drum Filtration System Sizes and Filter Area
Rotary drum filtration system units range from 3.5 to 140 square feet of filter area, so we can size a drum filter system to your specific application needs.
Rotary Vacuum Drum Filter Features and Benefits
A rotary drum filtration system earns its respect through the details below, most of which come standard rather than as add-ons.
- Low Landfill Disposal Costs: environmentally friendly disposal of waste.
- Continuous Cleaning Conveyor: ensures uninterrupted system operation.
- Extensive Accessories and Expansion Options: including temperature control, secondary filtration, magnetic filtration, mixed metal filtration, and mist collection.
- Stainless Steel Micro-Screen Septum: durable, efficient filtering capability.
- Patented Cylinder Design: increases filter area and filtration efficiency.
- Drive Components Accessibility: all drive components sit above liquid level for easy visual inspection.
- Patented Incremental Backwash: enhances cleaning efficiency.
- Fully Automated Operation: continuous operation without a separate clean tank.
- Compact and Modular Design: increases cake retention by 95% for clearer coolant during indexing.
Rotary Drum Filter Applications and Use Cases
Rotary Drum Filtration Systems are built for central coolant filtration across a shop, not for filtering fluid at a single machine.
If you need filtration for just one CNC or grinder, our Individual Machine Filtration line covers that.
These industrial drum filters support a range of applications, including:
Not sure what type of filtration you need or have questions about your equipment? Let our team of experienced applications engineers review your process and make a recommendation for your business.
Rotary Vacuum Drum Filter FAQs
Plant engineers and buyers researching rotary drum filtration for the first time tend to ask the same handful of questions before they request a quote.
Here are straight answers, and our glossary of filtration terms covers additional terminology if you need it.
A rotary vacuum drum filter uses a vacuum-placed drum that rotates inside the filter tank.
As fluid passes through the drum's stainless steel micro-screen septum, contaminants build a cake on the outer surface.
Once the cake reaches a set limit, an automatic incremental backwash cycle removes it with a scraper, and the drum keeps rotating and cleaning while your machine runs.
These Perma-Flow filters below ten microns using strainer-type separation, so it captures fine metal particulates that paper media and coarser screens pass through, without disposable filter media to buy or change out.
No. The Perma-Flow and PermaVac both filter through a stainless steel micro-screen septum instead of paper media, so cleaning is automatic and there's no media to replace.
Drum screen filter units range from 3.5 to 140 square feet of filter area per unit, and the modular design lets you run units in parallel for larger central coolant systems.
Request a quote and our applications engineers will size a system to your flow rate and cake retention needs.
Industry Applications
Our Rotary Drum Filtration Systems can be used in a variety of different applications including:
Not sure what type of filtration you need or have questions about your equipment?
Let our team of experienced applications engineers review your process to access your needs and make a recommendation that will be best for your business.
Explore Related Featured Projects
Below you will find some projects that have benefited from our technology.
