SS316L Diffuser for Ozone Oxygen Aeration
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China [CN] SS316L Diffuser for Ozone Oxygen Aeration
This diffuser is manufactured from SS316L stainless steel using a high-precision powder sintering process, resulting in a three-dimensional interconnected pore structure with a nominal filtration rating of 5 microns. The molybdenum content in SS316L provides excellent resistance to pitting and crevice corrosion, making it particularly suitable for the strong oxidizing environment of ozone as well as humid, chlorine-bearing conditions. The overall construction is compact, with relatively small external dimensions, allowing direct installation in confined spaces or multiple units in parallel. High mechanical strength enables the diffuser to withstand backwashing under pressure and high-temperature steam sterilization, with minimal risk of pore deformation or clogging over long-term use.
When applied to ozone or oxygen aeration, this diffuser disperses gas into microbubbles with diameters in the micron range, significantly increasing the specific interfacial area between gas and liquid phases, thereby enhancing gas dissolution efficiency and mass transfer rates. The outer surface is smooth, and the diffuser can be supplied with various connection types such as NPT threads, ferrule fittings, or pipe threads as required, facilitating integration with existing piping or aeration assemblies. Reliable sealing is achieved through precision metal-to-metal contact without complex gaskets. Under normal operating conditions, the diffuser exhibits stable pressure drop characteristics and reusability, making it suitable for aeration processes that require fine, uniform bubble output.
Product Specifications
Material: SS316L
Diameter:20.2mm
Length: 38.1mm
Filtration accuracy: 5µm
Connector: M5×0.8 BSF Thread
Technique: Sintering
Product Features
Narrow Bubble Size Distribution
At the nominal 5µm rating, the diffuser produces bubbles predominantly in the 5–10µm range, resulting in a narrow size distribution. This enables stable gas holdup and mass transfer coefficients in aeration tanks or reactors, facilitating process modeling and scale‑up.
Low Initial Aeration Pressure Drop
Compared with other porous metal elements, this diffuser requires a lower pressure drop at start‑up. It works directly with low‑pressure blowers or compact ozone generators, reducing system energy consumption and simplifying gas circuit design.
Scale Resistance and Chemical Cleaning Compatibility
The passivated SS316L surface has low roughness, effectively inhibiting attachment of organic slime and calcium/magnesium scale. After prolonged operation, diluted nitric acid, citric acid, or alkaline cleaning agents can be used for in‑situ or off‑line cleaning, restoring permeability without damaging the micropores.
Resistant to Gas Erosion with No Metal Particle Shedding
At typical gas velocities of 0.1–0.5m/s, the diffuser body experiences no erosion or shedding of metallic particles. This ensures purity of the downstream medium, which is especially important for water quality sensitive to solid contaminants or for protecting downstream precision equipment.
Wide pH and Water Chemistry Compatibility
The diffuser remains structurally stable across a pH range of 2–12 in ozone/oxygen aeration environments. It does not suffer from selective corrosion, pore expansion, or loss of strength, making it suitable for acidic, neutral, and weakly alkaline waters, including chlorine‑ or salt‑bearing wastewater.
Modular Parallel Configuration Capability
Each diffuser has a compact footprint and is supplied with standard threaded ports such as 1/8″ NPT or M6. Multiple units can be mounted in parallel on a single distribution manifold, allowing flexible scaling of gas flow without mutual interference. Bubble uniformity is maintained even in parallel arrangements.
Product Applications
Municipal Drinking Water Advanced Treatment
In an ozone contactor, this diffuser disperses ozone gas into micron sized bubbles, enhancing the formation pathway of hydroxyl radicals. This improves the removal efficiency of trace organic compounds, pesticide residues, and taste and odor causing substances.
Industrial Wastewater Advanced Oxidation
For industrial wastewater containing refractory COD (e.g., from textile, pharmaceutical, or chemical plants), the diffuser is used in ozone or ozone/peroxide combined aeration. It increases oxidant utilization and shortens the required reaction residence time.
Oxygenation of Wort in Craft Beer Brewing
During the wort cooling stage before fermentation, the diffuser introduces sterile oxygen into the wort to provide dissolved oxygen for initial yeast propagation. The stainless steel construction withstands high temperature steam in place sterilization, preventing microbial contamination.
Oxygenation in Recirculating Aquaculture Systems
In the oxygen cone or mixing chamber of a recirculating aquaculture system, the diffuser disperses pure oxygen into fine bubbles, improving oxygen transfer efficiency and reducing liquid oxygen consumption. It meets the continuous dissolved oxygen demand of high density farming.
Disinfection of Medical and Laboratory Wastewater
Suitable for small scale medical wastewater treatment units or laboratory biological wastewater disinfection modules, the diffuser uniformly injects ozone into the contact tank, ensuring effective inactivation of viruses and bacteria. Its compact design allows integration into enclosed cabinets.
Small Scale Gas Liquid Reactors and Catalytic Oxidation Units
In laboratory or pilot scale gas liquid reactors, the diffuser acts as a gas distribution element, delivering a stable and controllable microbubble flow. It is used for catalyst suspension reactions or for simulating industrial ozonation processes, and can be repeatedly cleaned and reused.
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