The core advantage of this backwash-specific water cap is its duplex stainless steel 2205 construction, which offers twice the tensile strength of 304 stainless steel and superior corrosion resistance to chloride ions, making it suitable for harsh wastewater and coal mine water environments. Its tapered slot structure widens from 0.3mm at the cap surface to 0.5mm at the interior, preventing filter media from lodging in slots during backwash and ensuring efficient media cleaning. The product can withstand a maximum backwash pressure of 2.0MPa and an impact resistance of ≥15J, resisting deformation or damage from high-velocity air-water mixture impacts during backwash cycles. Its 3.0m³/h backwash flow rate ensures rapid filter bed cleaning, reducing backwash time by 20% and saving water and energy costs.
This backwash-specific stainless steel water cap has a total length of 150mm, with a 60mm diameter cap body and a 90mm threaded handle (M32×2.0), fitting standard backwash filter bed water distribution plates. The cap body is forged from duplex stainless steel 2205, with a wall thickness of 2.5mm to withstand high backwash pressures. It features 72 tapered slots, with a surface width of 0.3mm and an interior width of 0.5mm, providing a total filtration area of 0.01㎡ to ensure uniform backwash water flow. The product has a maximum backwash pressure of 2.0MPa and a working temperature range of -10℃ to 150℃, adapting to high-temperature industrial backwash systems. Its impact resistance is ≥15J, and it is certified by CE and API 6D, meeting international industrial equipment standards. The surface is passivated to enhance corrosion resistance and wear resistance.
This backwash-specific water cap is primarily used in high-intensity backwash filter systems, including municipal wastewater treatment plant secondary filtration beds, industrial circulating water backwash filters, and coal mine water treatment facilities. In municipal wastewater treatment, its high-impact structure withstands air-water mixture backwash cycles, preventing cap damage that would require frequent replacements. In industrial circulating water systems, its tapered slot structure ensures efficient filter media cleaning, reducing backwash time by 20% and saving operational costs. In coal mine water treatment, its duplex stainless steel 2205 construction resists corrosion from high-chloride mine water, extending service life by 60% compared to standard caps. Additionally, it can be applied in power plant cooling water backwash systems and metallurgical wastewater treatment, providing reliable backwash water distribution for heavy-duty industrial processes.
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