DCF Mechanically Cleaned Filter Systems

Self cleaning filtration systems for non-water applications


The DCF-Series was developed for non-water applications where the fluids being filtered were especially challenging, perhaps being viscous, abrasive, or sticky. The advantages of the DCF design is that it will maintain a continuous low differential pressure and minimize product loss during the cleaning cycle.  The DCF design provides simple, reliable operation in which a low initial investment is a key driving factor.


How a Mechanically Cleaned Filter Works

Fluid flows into the top of the filter station and down through the center of the filter element, passing through the element walls and exiting the outlet connection.  The topside of the element is sealed, thus all of the unfiltered fluid enters the filter element.  Whatever particles are too large to pass thorough the element end-up falling to the bottom of the vessel or stuck against the element wall. 

A spring loaded cleaning disc travels the length of the element, the frequency of stroking is user programmable, and this pushes any material stuck on the sides of the element downwards to the bottom of the vessel, aptly referred to as the "purge chamber". The quartered and spring loaded cleaning disc is designed to ensure even and consistent force against the element to maximize cleaning efficiency. 

ronning-petter DCF 1600 design


The specially shaped purge chamber ends-up containing concentrated solids and is "flushed" based upon system pressure once the drain valve is opened.  The flushing frequency and duration are both user programmable (and can be manual if desired), however the time required for "flushing is usually on a second or two.

The models illustrated above have twin actuators, a design typically reserved for more viscous fluids.  Less viscous fluids only require a single actuator.


Spring Loaded Cleaning DiscPurge Chamber Design for self cleaning strainer


DCF filter systems for 20 to 1500+ GPM cost from $7,500 to $50,000+ depending upon the filter station body size and automation required.  The stroking requires compressed air and the frequency is adjustable by controlling the air flow.  Purging can be controlled manually, although typically via a "push button" to control an air actuated purge valve.   The automation of this system can include pneumatic or electric timers for both stroke and purge frequency or even a preprogrammed PLC that can network with your control system.


30-300 PSI operating pressure.
Flow rates up to 1,500 GPM.
Operating temperatures up to 400°F
Maximum solids concentration: 200 PPM
Particle retention range: 15 to 6250 microns
All wetted components 316SS
Elastomers and plastics are Viton®/EPT, urethane, Teflon® and Delrin®


Specialized DCF Filter Systems

Insulated Self-Cleaning Hot Fry Oil Filter

The DCF-400, DCF-800 and DCF-1600 have progressively larger filer bodies to accommodate higher flow rates (20, 60 and 200 GPM maximum respectfully). There are other variations in the DCF product family:


DCF-2000, designed for filtration of "white water" in the pulp and paper industry.  It differs from the other DCF designs because it has an electrically operated motor driven cleaning action, enabling it to handle up to 72% solids at 75 micron retention. The cleaning disc not only continuously sweeps the element clean to maintain a low differential pressure, but also agitates the purge chamber to keep the solids in a semi-liquid state for efficient purging.


DCF-FRY OIL, designed with FDA approved materials and insulation conducive to filtering hot fry oil (up to 400F), eliminating vibratory filters and paper band filters.


DCF-3000 has dual cleaning disc assemblies and has a capacity of about 2½ times the DCF-1600.  Depending upon the viscosity, the DCF-3000 can handle from 500 to 1,500 GPM.


Multiplexed DCF Filtration Systems

Multiplexed Automatic Filters for high flow rate and viscosity applications

The DCF-1600, DCF-2000 and DCF-3000 can be "multiplexed" for higher capacities.  We can essentially mount multiple filter stations to a common inlet, outlet and drain manifold to enable us to provide a higher open area filtration ratio and handle higher flow rates.


Use the navigation bar or click within the chart below to learn more about DCF, MCF and MCS filters and strainers.


Low capacity scraper strainer Medium capacity scraper strainer high capacity scraper strainer
DCF-400 DCF-800 DCF-1600
≤ 20 GPM ≤ 60 GPM ≤ 200 GPM
Automatic straienr for white water Automatic strainer for hazardous fluids Self-cleaning strainer for high viscosity fluids
DCF-2000 MCF-824 DCF-3000
≤ 200 GPM
High Solids
"white water"
≤ 200 GPM
Hazardous Fluids
≤ 1500 GPM
High Viscosity
Mechanically cleaned robotic strainers Multiplexed strainer systems
≤ 1500 GPM ≤ 12,000 GPM
• Eliminate disposable filter media such • Reduced disposal costs, material loss, labor, exposure and inventory
• Linear down and up cleaning motion • Provides constant low differential pressure
• Uninterrupted product flow during cleaning • Process consistency
• Compact footprint • Retrofits to most existing pipelines
• For use with a wide range of contaminate types, including gels.