Automatic backwash filter
K-OptiFil® Automatic Backwash Filter — self-cleaning, 1 micron
A continuous self-cleaning filter: fine filtration that cleans itself in seconds — without stopping.
Lenzing filtration technology · tailored to your process by K Factor, exclusive partner in North America
1 µm
finest, with filter cake
2,000 GPM
largest unit, rated flow
< 1%
typical reject of flow
How it works
Four steps. No downtime.
A backwashing filter that cleans one small segment at a time while the rest keeps filtering.
Filtration phase
- 1
Filters inside-out
A tubular filter: liquid flows from inside each tube out. Solids stay on the screen. Clean liquid flows on.
- 2
Triggers itself
Pressure difference or timer starts the clean.
Backwash phase
- 3
Flushes a small segment
A few seconds. The rest keeps filtering.
- 4
Wastes almost nothing
A patented seal keeps the reject small.
Models
Pick a size.
Every unit is sized to your fluid and solids.
K-OptiFil-2000
Rated 2,000 GPM. Up to ~3,000 GPM at low solids.
- Flow
- 2,000 GPM
- max ~3,000 at low solids
- Connection
- DN 350 (14")
- Max pressure
- 145 psi
- Max temp
- 120 °C
Fineness
5 µm mesh
1 µm with cake · 3 µm depth media
Materials
316Ti stainless
Carbon steel · 904L · alloys
Seals
EPDM · FKM · PTFE
Silicone · Buna
Motor control
Toshiba AS2 drive
Allen-Bradley Micro850 PLC · Optix HMI
Higher temperatures on request. Large flows run as parallel units. Needs plant air (min 58 psi).
Applications
What it filters.
A self-cleaning filter for liquids — water, oils, chemicals and food streams.
Water
Process, cooling, river, sea, well
Oils & coolants
Lubricants, cleaning baths
Chemicals
Acids, lyes, solvents, resins
Food streams
Sugar, molasses, starch
Compare
Backwash, bag or cartridge?
How automatic backwash filters compare with bag and cartridge filters.
K-OptiFil®
- Cleans itself
- Never stops flow
- Fabric lasts months
- Closed — no operator contact
Bag filter
- Manual bag change
- Stops, or needs a duplex
- Bags to buy and dispose
- Opened at every change
Cartridge
- Manual cartridge change
- Stops, or needs a duplex
- Cartridges to buy and dispose
- Opened at every change
FAQ
How does an automatic backwash filter work?
Strainer or backwash filter?
A strainer stops coarse solids and is cleaned by hand. A backwash filter stops much finer solids and cleans itself. Full comparison →
What starts the backwash?
A rise in pressure difference across the screen, a timer, or a manual push starts the clean. So an auto backwash filter cleans as often as the solids load calls for, not on a fixed schedule. How differential pressure triggers backwash →
Does it need consumables?
Only the filter fabric — replaced after several thousand backwashes, usually months.
What is the finest it filters?
5 µm on woven mesh. Down to 1 µm with a filter cake, so it works as a 1 micron filter that still cleans itself. 3 µm depth media for viscous liquids.
Can we test it on our fluid?
Yes. A K-OptiFil demo unit is available for on-site trials. Terms on request.
Get sized
Flow. Fluid. Solids.
Send us three numbers. An engineer replies within one business day.
K Factor engineering team
Your K-OptiFil partner in North America