The large-flow filter element is an efficient filtering component with a large-capacity open pleated structure. Each single large flux filter element has a flow rate far exceeding that of conventional microporous folded filter elements. It is suitable for industrial water treatment, pure water pre-treatment, circulating water, chemical fluids, etc., under large-volume working conditions. The core parameters mainly include precision, material, size, flow rate, pressure resistance, and temperature resistance.
1. Precision
The common nominal precision of high flow pleated filter element ranges from 1 to 200 μm. 1-5 μm is mostly used for pure water pre-treatment and precise pre-treatment of process fluids; 10-50 μm is commonly used for industrial circulating water, river water, well water purification, and the removal of sediment and colloidal impurities; 100-200 μm is mainly used for front-end coarse filtration and protection of the rear-end large flow filter element and equipment pipelines.
2. Material
The main components of the high flux filter element are the filter layer, inner and outer supporting frames, end caps, and sealing rubber rings. The mainstream material of the filter layer is polypropylene meltblown/folded (PP), polyester fiber (PET), and glass fiber (GF). Among them, polypropylene (PP) has the strongest versatility and the highest cost performance; the inner and outer supporting frames, central cylinder, and upper and lower end caps mostly use reinforced polypropylene materials, which are strong and not prone to deformation; the O-ring seal is commonly made of silicone rubber (SR), ethylene propylene diene monomer (EPDM), nitrile rubber (NBR), and fluororubber (FKM), which are suitable for different water qualities and chemical media.
3. Size
The industry-standard length of high flow water filter element is 20", 40", and 60"; the conventional outer diameter is 152mm, and the inner diameter is uniformly compatible with standard interface specifications. Compared with the ordinary 10-inch filter element, the effective filtration area of a single large flux filter element has significantly increased, with a larger pleated expansion area and higher pollutant retention capacity, which can significantly reduce the number of filter element usage.
4. Flow Rate
Taking a 40-inch, 25℃, 0.1MPa working condition as an example: the flow rate of 5 μm is 45-55m³/h, 10 μm is 55-65m³/h, and the flow rate of 20-50 μm is 70-85m³/h. The flow rate is several times that of ordinary folded filter elements under the same precision, suitable for large-volume centralized filtration scenarios.
5. Pressure Resistance
The conventional forward working pressure resistance of high flow pleated filter element at 25℃ is ≤0.42MPa, and the maximum forward pressure-bearing capacity can reach 0.5-0.6MPa; the reverse cleaning pressure resistance tolerance is ≤0.25MPa, and it is not prone to folding collapse or layer deformation. It is recommended to perform flushing or replace the large flow filter element when the pressure difference between the front and back reaches 0.2-0.3MPa during system operation.
6. Temperature Resistance
The temperature resistance performance is determined by the filter material and sealing material: the conventional PP material has a temperature resistance of ≤80℃, and it needs to be reduced pressure for use in high-temperature conditions; polyester and composite fiber models have a temperature resistance of up to 90℃; with special sealing rubber rings, it can be adapted to medium-temperature industrial circulating water conditions, resistant to corrosion and aging, and has a longer service life.
Substitute type:RFP010-40 RFP050-40 RFP100-40 RFP500-40 RFP1000-40