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All You Need to Know about Automatic Backwash Filters
Backwash Filters
Automatic Backwash Self-cleaning Filters
- Filter and pump simultaneously
- Easily connects to your pump suction hose
- Backwashes the filter screen clean as you pump
- Minimises blockages and maintenance
What are Automatic Backwash Filters?
What are Automatic Backwash Filters?
The RF200R-E and RF400R-E are self-cleaning intake filters for attachment to the suction hose of surface mounted pumps. These filters are the same as the RF200 filters and RF400 strainers with one difference. Unlike the RF200 and RF400 filters the backwash is not powered by the pump they are attached to - they have their own integral backwash pump to keep the filter mesh clear.
This allows you to vary the output of your pump without affecting the performance of the backwash in the filter – useful if you have a variable speed drive on your pump. The filter will self-clean whether there is a flow through the mesh or not. These filters and strainers will deliver up to 220 and 1000 litres / minute of filtered output.
The RF200R-E can be fitted with tough nylon filter mesh or sintered stainless steel mesh and can filter from 60 to 315 microns. The RF400R-E filters can be fitted with sintered stainless steel mesh or 1mm, 2mm, 3mm or 6mm mesh.
How Do Automatic Backwash Filters Work?
How Do Automatic Backwash Filters Work?
Rotorflush RF200R-E and RF400R-E automatic backwash filters are self-cleaning pump intakes. They provide protection against blockage to dry mounted pumps and other connected equipment. The RF200R-E and RF400R-E filters have a separate motor to drive their internal self-cleaning backwash, so that the cleaning mechanism is driven independently of the surface mounted pump.
The filter is a basket filter with internal cleaning jets on a rotor. The built-in backwash pump takes filtered water from inside the filter and pumps the water back though the jets inside the filter blasting the filter mesh with filtered water. This repels any weed, debris or rubbish that might otherwise block the filter mesh.
These backwash filters can be used where the pump output is variable without compromising the filter’s backwash. The motor continuously backwashes the mesh screen blowing away anything that might cause it to block, whether your pump is pumping a low or high volume of water.
These are stainless steel dirty water suction intake filters with a capacity of up to 220 litres / minute (14 m3 per hour), capable of filtering from 60 microns to 6mm.
Mesh Sizes for Automatic Backwash Filters
Automatic Backwash Filter Mesh Sizes
Because these filters have a built-in backwash pump, they automatically self-clean. This means that you can use relatively fine mesh screens on your pump suction intake line.
The RF200R-E automatic backwash filter can be fitted with replaceable nylon mesh inserts; on average nylon mesh inserts need replacing every 5000 hours continuous use for 300 micron mesh, and every 1000 – 2000 hours continuous use for 60 and 115 micron mesh, although these maintenance intervals will vary according to water conditions.
The RF200R-E can also be fitted with stainless steel filter mesh, and needs jet washing at similar intervals.
The RF400R-E is designed for coarser filtration and can be fitted with 1, 2, 3 or 6mm stainless steel filter mesh.
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