I. Basic Product Information
[Product Name] Foam Filter Beads, also known as EPS Foam Filter Beads, Polystyrene Foam Filter Beads, and Expanded Polystyrene Filter Beads. They are often referred to as Foam Filter Media or EPS Filter Beads for short in the industry.
[Product Material] The core material is expandable polystyrene (EPS) resin, supplemented with food-grade foaming agents and stabilizers. It is processed through multiple procedures such as high-temperature foaming, molding, screening, and drying. It does not contain any toxic or harmful additives and meets environmental and drinking water hygiene standards.
[Product Positioning] A new type of high-efficiency lightweight filter material, mainly used in the filtration stage of various water treatment systems. It can replace traditional filter materials such as quartz sand, anthracite, and activated carbon. With the advantages of light weight, porous structure, high efficiency, and easy regeneration, it is widely used in municipal, industrial, environmental protection, civil and other fields.
[Production Process] Adopts a fully automatic closed-loop production process. The specific flow is: EPS resin particle screening → pretreatment (impurity removal and drying) → mixing with food-grade foaming agent → high-temperature foaming (temperature controlled at 120-150℃, pressure 0.3-0.5MPa) → molding and shaping → particle screening (classification by particle size) → drying (moisture content ≤1%) → quality inspection → packaging and warehousing. There is no waste water or waste gas emission during the whole process, and the production complies with national environmental protection standards.
[Product Appearance] Regularly white regular spherical particles. Some can be customized in colors such as light yellow and milky white according to customer requirements. The particle surface is smooth without burrs, no agglomeration, no obvious impurities, uniform particle size, round spheres, no deformed or broken particles (broken rate + wear rate ≤2%).
II. Core Product Features
(1) Lightweight and Porous with Outstanding Filtration Efficiency
The interior of the foam filter bead features a uniform honeycomb porous structure, with a porosity as high as 90%-95%, much higher than that of traditional quartz sand filter media (approximately 40%-50% porosity). This porous structure gives the filter beads an extremely large specific surface area (up to 500-800 ㎡ per cubic meter), enabling efficient interception of impurities in water such as suspended solids, colloidal particles, sediment, algae, and organic debris, with an interception precision of 1-5 μm. Meanwhile, the porous structure reduces filtration resistance, with a filtration flux reaching 10-20 m³/(m²·h), which is 2-3 times that of traditional filter media. This can effectively improve the treatment efficiency of water treatment systems and reduce equipment footprint.
In addition, the bulk density of the filter beads is only 20-30 kg/m³, much lighter than quartz sand (1400-1600 kg/m³) and anthracite (800-1000 kg/m³). For the same volume of filter media loading, the weight of foam filter beads is only 1/50 to 1/40 that of traditional filter media, greatly reducing the load pressure on filtration equipment and extending service life.
(2) Strong Chemical Stability for Diverse Working Conditions
EPS resin, the core material of foam filter beads, boasts excellent chemical stability, being acid-resistant, alkali-resistant, salt-resistant, and corrosion-resistant. It can operate stably for a long time in water environments with a pH value of 2-12, without decomposition or dissolution of harmful substances, and causes no secondary pollution. With a temperature resistance range of -50℃ to 80℃, it adapts to various filtration scenarios with different temperatures and water qualities, including municipal water supply, industrial wastewater, and circulating cooling water. It is especially suitable for complex water treatment in industries such as chemical, metallurgical, printing and dyeing, and electric power (e.g., filtration of acidic or alkaline wastewater).
Tested by authoritative institutions, after soaking in 5% hydrochloric acid solution and 5% sodium hydroxide solution for 24 hours, the mass loss rate of foam filter beads is ≤1%, with no obvious corrosion or deformation on the surface and stable performance. It can also operate normally for a long time in water containing corrosive ions such as chloride ions and sulfate ions without oxidation or degradation.
(3) Excellent Regeneration Performance and Long Service Life
Foam filter beads are lightweight and easy to backwash, requiring a backwash intensity of only 8-12 L/(m²·s) and a backwash time of 5-10 minutes. The backwash water consumption is merely 3%-5% of the filtered water volume, much lower than that of traditional quartz sand filter media (10%-15%), greatly saving water resources and operation and maintenance costs. During backwashing, the filter beads fully roll and collide under water flow, allowing impurities trapped on the surface to fall off quickly. After regeneration, filtration efficiency can be restored to the initial level, eliminating the need for frequent filter media replacement.
Under normal operating conditions (regular backwashing and water quality meeting design requirements), the service life of foam filter beads can reach 5-8 years, 2-3 times that of traditional quartz sand filter media (2-3 years), effectively reducing filter media replacement and labor operation costs. Even in scenarios with poor water quality and high impurity content, they can still be used normally after multiple regenerations, and only need replacement when obvious particle breakage occurs (breakage rate exceeding 2%).
(4) Environmentally Friendly, Safe and Non-toxic, Meeting Hygiene Standards
Foam filter beads are produced using food-grade EPS resin and food-grade foaming agents. The production process emits no toxic or harmful gases or wastewater, and the product itself is odorless and non-toxic. Tested for national drinking water hygiene and safety compliance, they meet the Safety Evaluation Standard for Equipment and Protective Materials for Drinking Water Distribution (GB/T 17219-1998). They can be directly used in drinking water-related applications such as raw water pretreatment in water plants and advanced drinking water filtration without causing secondary pollution to drinking water.
Furthermore, waste foam filter beads are recyclable. After crushing and re-foaming, they can be remade into filter beads or other EPS products without environmental pollution, in line with the national development concept of "green environmental protection and recycling".
(5) Convenient Construction and Operation, Low Comprehensive Cost
Due to their light weight, foam filter beads do not require large lifting equipment for loading, replacement, or maintenance, and can be handled manually, greatly reducing construction difficulty and labor costs. For example, filling a 100 m³ filter tank with foam filter beads only takes 2-3 workers 1-2 days, whereas filling with quartz sand requires 5-8 workers 3-4 days with the help of cranes and other equipment.
During operation and maintenance, no special maintenance is needed except regular backwashing, reducing the workload of operation and maintenance personnel. Meanwhile, the long service life and low backwash water consumption of the filter beads further reduce operation costs. Overall, the comprehensive use cost (purchase cost + construction cost + operation cost) of foam filter beads is only 60%-70% that of traditional filter media, offering high cost performance.
(6) Uniform Particle Size for Diverse Filtration Requirements
Foam filter beads are produced with precise screening technology, with a particle size deviation of ≤±0.2 mm and high particle uniformity. According to the needs of different water treatment scenarios, filter beads of various particle sizes (0.5-12.0 mm) can be selected to achieve graded filtration and deep filtration. For instance, 0.5-1.0 mm particles can be used for fine filtration, and 5.0-12.0 mm particles for rough filtration. Different particle sizes can also be layered to form a gradient filtration system, further improving filtration efficiency.
III. Common Specifications (Complete Version with Detailed Supplements)
The specifications of foam filter beads can be customized according to customer requirements. The following are the common standard specifications in the industry. All parameters have been tested by authoritative institutions and comply with relevant national standards, as shown in the table below: | Specification and Model (Particle Size) | Bulk Density (kg/m³) | Moisture Content (%) | Porosity (%) | Crushability + Wear Rate (%) | Specific surface area (㎡/m³) | Compressive strength (kPa) | Temperature resistance range (℃) | Appearance and morphology | Application scenarios |
| 0.5-1.0mm | 25-30 | ≤1 | ≥93 | ≤2 | 700-800 | ≥150 | -50~80 | White spherical, uniform particles, no impurities | Fine filtration, deep filtration of drinking water, small-scale water purification equipment |
| 1.0-2.0mm | 23-28 | ≤1 | ≥92 | ≤2 | 600-700 | ≥140 | -50~80 | White spherical, uniform particles, no impurities | Municipal water supply pretreatment, swimming pool water purification, landscape water filtration |
| 2.0-3.0mm | 22-27 | ≤1 | ≥91 | ≤2 | 550-650 | ≥130 | -50~80 | White spherical, uniform particles, no impurities | Industrial circulating water filtration, domestic sewage treatment, reclaimed water reuse pretreatment |
| 3.0-5.0mm | 21-26 | ≤1 | ≥90 | ≤2 | 500-600 | ≥120 | -50~80 | White spherical, uniform particles, no impurities | Coarse filtration of industrial wastewater, turbidity removal of groundwater, and filter bed cushioning |
| 5.0-8.0mm | 20-25 | ≤1 | ≥90 | ≤2 | 450-550 | ≥110 | -50~80 | White spherical, uniform particles, no impurities | Cushion layer of large-scale filter tank, pretreatment of high-turbidity water, filtration of mine wastewater |
| 8.0-12.0mm | 20-24 | ≤1 | ≥90 | ≤2 | 400-500 | ≥100 | -50~80 | White spherical, uniform particles, no impurities | Underlying cushion of filter tank, coarse filtration of large-scale water treatment equipment, rainwater collection and filtration |
【Supplementary Notes】
- 1.Particle size can be customized according to customer requirements, with the range extendable to 0.3–15.0 mm. Special particle sizes require advance communication regarding the production cycle;
- 2.Parameters such as bulk density and porosity can be adjusted based on the foaming process to meet the personalized needs of different customers;
- 3.The compressive strength index ensures that the filter beads are not easily broken during stacking and backwashing, guaranteeing the stability of the filtration system;
- 4.The larger the specific surface area, the higher the filtration efficiency. Filter beads of corresponding specifications can be selected according to the required filtration precision.
IV. Quality Implementation Standards
The product quality of foam filter beads strictly complies with relevant national standards and industry specifications. The core implementation standards are Safety Evaluation Standard for Equipment and Protective Materials in Water Distribution Systems for Drinking Water (GB/T 17219-1998) and Filter Media for Water Treatment (CJ/T 43-2005). Meanwhile, strict internal quality control standards are adopted to ensure that each batch of products meets the requirements. The specific quality standards and testing methods are as follows:
(I) Appearance Quality Standards
- Color: Normally white; light yellow and milky white are available upon customization. The color shall be uniform without obvious color difference;
- Shape: Regular spherical particles with smooth surface, free from deformation, burrs and agglomeration. The diameter deviation of a single particle shall be ≤ ±0.2 mm;
- Impurities: Free from visible impurities (such as sediment, dust, plastic debris, etc.) and odor;
- Breakage rate + attrition rate: ≤ 2% (Testing method: Weigh 100 g of dried filter beads and place them into a standard attrition tester. Run at a rotating speed of 200 r/min for 30 minutes. Sieve out the intact particles and calculate the mass percentage of broken and abraded particles).
(II) Physical and Chemical Index Standards
- Bulk density: 20-30 kg/m³ (Test method: Volumetric method. Take 1 m³ of dried filter beads, weigh them, repeat 3 times, and take the average value);
- Moisture content: ≤1% (Test method: Weigh 50 g of filter beads, place them in a constant-temperature drying oven at 105℃, dry to constant weight, and calculate the proportion of water loss);
- Porosity: ≥90% (Test method: Soaking method. Weigh the mass of dried filter beads as m₁, soak them in water for 24 hours, dry the surface moisture and weigh the mass as m₂. Porosity = (m₂−m₁) / (m₂−m₁ + Volume of filter beads × Density of water) × 100%);
- Compressive strength: ≥100 kPa (Test method: Use a pressure testing machine to apply pressure to a single filter bead until the particle breaks, record the pressure value at breakage, and take the average value of 10 particles);
- Corrosion resistance: After soaking in 5% hydrochloric acid and 5% sodium hydroxide solution for 24 h, mass loss rate ≤1% (Test method: Weigh 50 g of dried filter beads, place them in 5% hydrochloric acid and 5% sodium hydroxide solution respectively, soak for 24 hours, take out and dry to constant weight, calculate the proportion of mass loss);
- Specific surface area: ≥400 ㎡/m³ (Test method: Use a BET specific surface area analyzer to test the specific surface area of filter beads, repeat 3 times, and take the average value).
(III) Hygiene and Safety Standards
- Non-toxic and Harmless: Free of peculiar odors and dissolution of toxic and harmful substances, complying with the Safety Evaluation Standard for Equipment and Protective Materials for Drinking Water Distribution (GB/T 17219-1998);
- Hygiene Testing: Tested by an authoritative testing institution, with heavy metal (lead, cadmium, mercury, chromium, etc.) content ≤ 0.001 mg/L, total bacterial count ≤ 10 CFU/g, and no coliform bacteria detected, meeting drinking water hygiene requirements;
- Environmental Protection Requirements: Products are recyclable and will not pollute soil, water bodies or air after disposal, in line with national environmental protection standards.
(IV) Quality Inspection Process
- Raw Material Inspection: Conduct incoming inspections on EPS resin, foaming agents, stabilizers and other raw materials to ensure they meet quality standards;
- Production Process Inspection: Sample and test indicators such as particle size, morphology and moisture content of filter beads in each production process including foaming, molding, screening and drying, and adjust production parameters in a timely manner;
- Finished Product Inspection: Conduct comprehensive inspections (appearance, physical and chemical indicators, hygiene and safety indicators) before each batch of finished products leaves the factory. A Product Quality Inspection Report will be issued only after passing the inspection before delivery;
- After-sales Inspection: If customers have objections to product quality upon receipt, they may entrust an authoritative testing institution for inspection. Unconditional return or replacement will be provided if the product fails the inspection.
V. Main Applications of the Product
Thanks to its advantages of light weight, porosity, high efficiency and environmental friendliness, foam filter beads are widely used in various fields such as municipal water treatment, industrial water treatment, environmental water treatment, civil and landscape water treatment. The specific applications and details are as follows:
(1) Municipal Water Treatment Sector
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Raw Water Pretreatment in Water Plants
As the core filter material for filter tanks and filter cans, it is used to remove impurities such as suspended solids, colloids, sediment and algae from raw water, reduce raw water turbidity, and lay a foundation for subsequent disinfection and advanced treatment. It is suitable for water plants using surface water and groundwater as water sources, especially for the pretreatment of high-turbidity raw water, which can greatly improve the efficiency of subsequent treatment and reduce treatment costs. -
Advanced Filtration in Municipal Sewage Treatment Plants
It is used for advanced filtration of effluent from sewage treatment plants to remove residual suspended solids, organic matter, chroma and other substances in water after secondary treatment, so that the effluent meets the Class I Level A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), and can be used for reclaimed water reuse, landscape water and other purposes. -
Pipe Network Terminal Water Purification
It is used for terminal water purification of centralized water supply facilities in communities, schools, hospitals and other places to further remove impurities such as suspended solids and rust produced during pipeline transportation, improve effluent water quality and enhance drinking water safety. -
(II) Industrial Water Treatment Sector
- Circulating Cooling Water Purification: Used in circulating cooling water systems in industries such as electric power, chemical engineering, metallurgy, papermaking, printing and dyeing, etc. It removes impurities including suspended solids, scale, and microbial slime from water, prevents scaling and clogging of heat exchangers and pipelines, improves circulating water utilization efficiency, and reduces equipment corrosion and energy consumption.
- Boiler Feed Water Pretreatment: Applied to the pretreatment of boiler feed water to remove suspended solids, colloids, hardness substances and other contaminants, preventing boiler scaling and corrosion, extending boiler service life, and ensuring safe and stable operation. Suitable for industrial boilers, power station boilers, etc.
- Industrial Wastewater Filtration: Used for the filtration treatment of industrial wastewater such as chemical wastewater, metallurgical wastewater, printing and dyeing wastewater, papermaking wastewater, and mine wastewater. It removes impurities including suspended solids, sediment, organic matter, and heavy metal ions from wastewater, reduces turbidity and pollutant content, provides support for subsequent biochemical treatment and advanced treatment, and realizes qualified discharge or reuse of wastewater.
- Pure Water Filtration for Electronics and Semiconductor Industry: Used in the pretreatment process of pure water and ultrapure water preparation in the electronics and semiconductor industry to remove tiny suspended solids and colloidal particles from water, ensuring stable operation of subsequent processes such as reverse osmosis and ion exchange, and improving pure water purity.
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(III) Environmental Protection and Water Treatment Field
- Domestic Sewage Treatment: Used in the filtration process of rural domestic sewage treatment and urban domestic sewage treatment stations to remove pollutants such as suspended solids, organic matter, nitrogen and phosphorus from domestic sewage, improve effluent quality, and realize sewage reuse (e.g., greening irrigation, toilet flushing, etc.).
- Reclaimed Water Reuse Advanced Filtration: As the core filter material for reclaimed water reuse systems, it is used to remove residual suspended solids, chroma, odor and other substances from reclaimed water, enabling the water to meet reuse standards. It is widely applied in residential area greening, road cleaning, industrial cooling and other fields to conserve water resources.
- Groundwater Turbidity Removal and Purification: Used for turbidity removal treatment after groundwater exploitation to remove impurities such as sediment, suspended solids, iron and manganese oxides from groundwater, improving water quality to meet standards for drinking or industrial use.
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- Landfill Leachate Filtration: Used for the pretreatment of leachate from landfills to remove impurities such as suspended solids, sediment, and organic matter, thereby reducing the difficulty of subsequent treatment and minimizing environmental pollution.
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(IV) Civil and Landscape Water Treatment Sector
- Swimming Pool Water Purification: Used for water quality filtration in facilities such as swimming pools, hot spring pools, and water parks to remove impurities including suspended solids, algae, and human secretions from water, maintaining clear and transparent water quality in compliance with the Water Quality Standard for Swimming Places (GB/T 18267-2019). Meanwhile, it reduces the dosage of disinfectants and lowers the irritancy of water quality.
- Landscape Water Treatment: Applied to the filtration of landscape water such as artificial lakes, landscape fish ponds, and fountains to remove suspended solids, algae, organic matter, and other substances from water, prevent water eutrophication, keep landscape water clear, reduce peculiar smells and algae growth, and improve landscape effects.
- Small-Scale Water Purification Equipment: Used as filter media in household water purifiers, commercial water purifiers, small centralized water purification equipment in rural areas, etc., to remove impurities like suspended solids, sediment, and colloids from water, enhancing the taste and safety of drinking water.
(V) Other Special Applications
- Air Filtration: Can serve as an air filtration material for air conditioners, fresh air systems, air purifiers, etc., to remove dust, particles, and other impurities from the air and improve air quality;
- Thermal Insulation: Owing to its porous structure, foam filter beads can be used as thermal insulation materials for buildings and pipelines, featuring the advantages of light weight and excellent thermal insulation performance;
- Soil Improvement: Suitable for soil improvement in landscaping and agricultural planting to enhance soil air permeability and water retention capacity, increase soil fertility, and promote plant growth.
VI. Packaging, Storage and Transportation
(I) Packaging Standards
- Conventional Packaging: Packed in high-quality polypropylene woven bags with a specification of 25kg per bag. The bag thickness shall be ≥0.12mm and tensile strength ≥1500N/㎡. The bags are moisture-proof, dust-proof and wear-resistant, which can effectively protect the filter beads from contamination and damage.
- Packaging Labeling: The front of each bag shall be printed with information including product name, specification and model, particle size, net weight, manufacturer, production date and shelf life. The side shall be printed with product application, quality standards, storage and transportation precautions, contact information and other details. The labels shall be clear and standardized for easy identification and traceability.
- Customized Packaging: Packaging of different specifications (such as 50kg per bag, 100kg per bag) or ton bags (1000kg per bag) can be customized according to customer requirements, suitable for large-volume transportation and storage.
- Packaging Inspection: Sealing test shall be conducted for each bag before packaging to ensure no damage or material leakage. Sampling weighing shall be carried out after packaging to ensure the net weight error is ≤±0.5kg.
(II) Storage Requirements
- Storage Environment: The product shall be stored in a dry, ventilated, cool and clean warehouse, away from direct sunlight, rain, high temperature and humidity. The warehouse temperature shall be controlled at -5℃ to 35℃, with a relative humidity ≤70%.
- Stacking Requirements: When stacking, keep away from sharp objects and corrosive substances to avoid packaging damage. The stacking height shall not exceed 10 layers to prevent the bottom packaging from being crushed and filter beads from caking. Filter beads of different specifications and batches shall be stacked separately and clearly labeled to avoid confusion.
- Shelf Life: Under proper storage conditions, the product shelf life is 2 years. After the expiration date, the product must be re-inspected for quality and can only be used if qualified.
- Warehouse Management: Regularly inspect the warehouse environment, promptly remove dust and debris, and check the integrity of packaging. Deal with any damage or material leakage immediately to prevent filter bead contamination.
(III) Transportation Requirements
- Transportation Tools: Trucks, containers and other means of transport may be used. Transport vehicles shall be clean, dry, odor-free and free of corrosive substances, and shall not be mixed with toxic, harmful, corrosive or sharp items.
- Loading Requirements: Handle with care during loading, avoid throwing, dropping or squeezing to prevent packaging damage. The loading height shall comply with the load-bearing requirements of the transport tool to avoid overloading. The product shall be properly secured to prevent displacement and collision of filter beads during transportation.
- Transportation Environment: Avoid direct sunlight, rain, high temperature and humidity during transportation. Sunshade measures may be adopted for summer transportation, and anti-freezing measures for winter transportation to prevent deformation and caking of filter beads caused by temperature changes.
- Transportation Precautions: Observe traffic rules during transportation, avoid sudden braking and sharp turns to prevent packaging damage. For long-distance transportation, regularly check the packaging and handle any problems promptly.
- Unloading Requirements: Handle with care during unloading, avoid throwing, dropping or squeezing. Transport the filter beads to the designated storage area, stack them by category and label them properly.
VII. Comparison of Product Advantages
Compared with traditional filter materials (quartz sand, anthracite, activated carbon), foam filter beads have significant advantages in terms of performance, cost, operation and maintenance. The detailed comparison is shown in the table below: | Comparison Items | Foam filter beads | quartz sand filter media | Anthracite filter material | Activated carbon filter material |
| Bulk Density (kg/m³) | 20-30 | 1400-1600 | 800-1000 | 500-700 |
| Porosity (%) | 90-95 | 40-50 | 50-60 | 70-80 |
| Filtration flux (m³/(m²·h)) | 10-20 | 3-8 | 4-9 | 5-10 |
| Backwash water consumption rate (%) | 3-5 | 10-15 | 8-12 | 10-15 |
| Service life (years) | 5-8 | 2-3 | 2-4 | 1-2 |
| construction difficulty | Low (can be loaded manually) | High (requires lifting equipment) | High (requires lifting equipment) | Medium (requires manual work + auxiliary equipment) |
| Overall usage cost | Low (60%-70% of that of traditional filter materials) | tall | tall | Extremely high (expensive price, frequent replacement) |
| Environmental friendliness | High (recyclable, no secondary pollution) | Medium (non-recyclable, prone to secondary pollution) | Medium (non-recyclable, prone to secondary pollution) | Medium (difficult to recover after saturation, easy to cause pollution) |
| Applicable scenarios | Wide-ranging (municipal, industrial, environmental protection, civil, etc.) | Limitation (mainly used for rough filtering) | Limitations (mainly used for coarse filtration of industrial wastewater) | Limitations (mainly used for deep deodorization and decolorization) |
VIII. Usage Instructions
To ensure the performance of foam filter beads, extend their service life and reduce operation and maintenance costs, the following precautions shall be observed during use:
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Preparation before loading: Before loading the filter beads, thoroughly clean the filter tank and filter vessel to remove sediment, debris, rust, etc., to avoid contamination of the filter beads. Meanwhile, inspect the influent and effluent pipelines of the filter tank and vessel to ensure no blockage or leakage.
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Filter bead loading: Lay the beads evenly during loading to avoid excessively dense or loose local accumulation. The loading height shall be determined based on filtration requirements (normally 0.8–1.5 m). When loading filter beads of different particle sizes in layers, lay them from coarse to fine in sequence. A filter screen may be placed between layers to prevent mixing of beads with different sizes.
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Initial use: Before initial use, rinse the filter beads with clean water 2–3 times to remove dust, chippings and other impurities on the surface. The beads can be put into formal use only when the effluent becomes clear.
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Backwashing operation: Backwash the filter beads regularly. The backwashing cycle shall be determined according to the influent water quality and filtration flux (normally 1–3 days). During backwashing, control the backwashing intensity at 8–12 L/(m²·s) and the backwashing time at 5–10 minutes. Stop backwashing once the effluent is clear to avoid excessive backwashing that may cause loss of filter beads.
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Water quality control: Raw water entering the filtration system shall be pretreated first (e.g., via grids, sedimentation tanks) to remove large-particle impurities (particle size > 10 mm). This prevents large particles from entering the filter tank, clogging the pores of the filter beads and impairing filtration efficiency, while reducing abrasion and breakage of the beads.
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Troubleshooting for abnormal conditions: If a significant drop in filtration flux or a rise in effluent turbidity occurs, it may be due to clogged pores or damaged filter beads. Backwashing shall be carried out promptly. If the performance remains unsatisfactory after backwashing, inspect whether the breakage rate of the filter beads exceeds 2%; if so, replace the beads. If caking is observed, gently stir to loosen the beads and screen them if necessary to remove agglomerated particles.
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Replacement cycle: Under normal operating conditions, the service life of foam filter beads is 5–8 years. The beads shall be replaced in a timely manner when their breakage rate exceeds 2% and filtration performance fails to meet requirements. During replacement, completely remove the old beads before loading new ones to avoid mixing old and new beads that may affect filtration efficiency.
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Safety precautions: When loading or replacing filter beads, operators shall wear gloves and masks to prevent bead dust from entering the respiratory tract or contacting the skin. As the beads are lightweight particles, avoid loading them on windy days to prevent scattering. Do not discard the beads at will; waste foam filter beads shall be recycled or disposed of properly in accordance with environmental protection requirements.
IX. Supplementary Instructions
- This product can be customized with foam filter beads of different particle sizes, colors and packaging specifications according to customer needs. Specific customization requirements can be discussed and negotiated with the manufacturer.
- Each batch of products is accompanied by a Product Quality Inspection Report to ensure that the product quality complies with relevant national standards.
- The manufacturer provides comprehensive after-sales service, including product consultation, construction guidance, and quality objection handling, to ensure normal use by customers.
- The content of this product manual is compiled based on actual testing data and application cases. If you have any questions, you may contact the manufacturer for more detailed technical parameters and application solutions.
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