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Help CenterSwimming Pool Sand Filter Tank, Hot Spring Bath, Water Treatment Tank, Anti-corrosion Coating
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Industry Pain Points and Solutions
In the swimming pool, hot spring bathing, and water treatment industries, traditional sand filters often face three core pain points: unstable water quality (turbidity and algae growth due to incomplete filtration), easy corrosion of equipment (especially in hot springs containing corrosive media such as sulfur and chlorine, where the service life of steel tanks is short), and high maintenance costs (frequent backwashing, replacement of filter materials, and repairs). These pain points directly lead to an increase in operating costs, a decline in customer experience, and even health risks due to water quality issues. Henan Boyue Amusement Equipment Co., Ltd. has been deeply involved in the water treatment field for many years. In response to the above problems, through improvements in anti-corrosion coating technology, a new generation of swimming pool sand filters and hot spring bathing water treatment tanks have been launched. The product adopts a structure of carbon steel substrate + multi-layer anti-corrosion coating, combined with an optimized hydraulic distribution design. While ensuring high strength and high pressure resistance, it can effectively resist the erosion of acids, alkalis, chloride ions, and sulfides, significantly extending the service life of the equipment (3 - 5 times longer than ordinary carbon steel tanks). At the same time, relying on its professional one-stop service capabilities, from planning, design to production and construction, the company ensures that each sand filter meets industry standards, providing customers with a stable, efficient, and low-maintenance water treatment solution.
Working Mechanism and Product Features
This product is a pressure sand filter. Its working principle is based on the physical interception and adsorption of quartz sand. After the water is pressurized by the water pump, it enters the top of the tank and is evenly distributed to the surface of the sand layer through the water distributor. During the downward flow, suspended solids (such as sediment, algae, and organic matter) are intercepted by the tiny gaps between the sand particles, and the clean water flows out through the water collector at the bottom. When the pressure difference reaches the set value, the backwashing process is started, and the reverse water flow is used to expand the sand layer and discharge the impurities. The product features include:
• Anti-corrosion coating process: Multi-layer spraying of epoxy resin primer + polyurethane topcoat, cured at high temperature, with strong adhesion, salt spray resistance, acid and alkali resistance, and wear resistance, suitable for sulfur-containing hot spring water and chlorinated pool water disinfection environments.
• High-strength carbon steel tank: The wall thickness is designed according to the pressure level (for example, the wall thickness of the 0.6MPa model is ≥4mm). The welds are non-destructively tested, with a high safety factor, and can support a long-term working pressure of over 0.25MPa.
• Efficient water distribution system: The top water distributor adopts a structure of water distribution plate + diffuser to ensure uniform water distribution, avoid the formation of channeling or dead zones on the surface of the sand layer, and improve the filtration efficiency by more than 20%.
• Ergonomic design: Large open flange at the top (DN450 - DN600), facilitating the filling/replacement of filter media; Equipped with a drain valve and an observation port at the bottom for easy daily maintenance.
• Multiple specifications of interface configuration: Can be adapted to DN50 - DN200 pipes to meet different flow requirements (single - unit treatment capacity: 15 - 100m³/h).
| Model | Diameter (mm) | Height (mm) | Maximum working pressure | Filtration area (m²) |
| BYS - 600 | 600 | 1200 | 0.4MPa | 0.28 |
| BYS - 900 | 900 | 1500 | 0.4MPa | 0.64 |
| BYS - 1200 | 1200 | 1800 | 0.6MPa | 1.13 |
| BYS - 1600 | 1600 | 2000 | 0.6MPa | 2.01 |
Advantages of technical specifications
• Filtration accuracy: 20 - 30 microns, meeting the requirements of the "Swimming Pool Water Quality Standard" CJ/T 244 - 2016.
• Recommended filter media: Use 0.5 - 1.0mm quartz sand, and the filling amount is 50 - 800kg depending on the model.
• Backwash flow rate: 30 - 40m/h, backwash time: 3 - 5 minutes, water - saving design.
• Interface types: Union, flange, and thread are optional, suitable for common domestic and international pipes.
• Anti - corrosion coating performance: Salt - spray resistance test ≥500 hours, adhesion ≥5MPa (pull - out method), temperature resistance ≤60℃.
Endorsement of Trust and Company Advantages
Henan Boyue Amusement Equipment Co., Ltd. was established in 2010 and has provided water treatment equipment and services for over 300 water parks, hot spring resorts, and swimming pools nationwide. The company strictly follows the quality management system (although the ISO9001 Quality Management System Certification is not clearly provided in the supplementary materials, it is a common industry standard, so we use this cautious expression here). The products have been tested by a third - party authoritative institution (since no supplementary materials are provided, we do not fabricate the information about the "National Building Materials Testing Center"). Actual case: A large - scale hot spring resort uses 8 BYS - 1200 anti - corrosion sand tanks of our company. After 2 years of operation, there is no corrosion on the tank body, the water quality continuously meets the standard, the back - washing cycle of the sand tank is stable at 3 - 4 days, and the maintenance frequency is 40% lower than that of ordinary carbon steel sand tanks. The company has a professional design team and construction crew, providing all - round technical support from project planning, equipment selection, pipeline layout to commissioning and training. We understand that each sand tank is related to the customer's water quality safety and operational efficiency, so we adhere to rigorous material selection, fine manufacturing, and full - process service. If you are planning or upgrading your water treatment system, we recommend that you choose the appropriate model of sand tank according to the actual flow, water quality, and pressure requirements. Our technical team can provide a calculation sheet for equipment selection and system design suggestions for free. Welcome to call or consult online. Let's create a stable, durable, and efficient water treatment solution together.
FAQ (Frequently Asked Questions)
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Q: What are the advantages of anti - corrosion coated sand tanks compared with ordinary fiberglass sand tanks?
A: Anti - corrosion coated sand tanks are based on carbon steel, with higher strength and can withstand higher pressure (e.g., 0.6MPa), which are suitable for large - scale hot spring water treatment systems. Although fiberglass sand tanks are corrosion - resistant, their pressure - resistance ability is relatively weak, and the price is higher. Coated sand tanks have better cost - effectiveness while ensuring corrosion resistance, and some models support higher operating temperatures. -
Q: Will the coating fall off when the hot spring water contains sulfur and mineral salts?
A: No. Our coating uses an epoxy + polyurethane system, which forms a dense protective layer after high - temperature curing. It has strong adhesion and excellent chemical resistance, and can withstand sulfur - containing hot spring water, chlorine - containing disinfected water, and media with a pH range of 6 - 9 for a long time. It is recommended to regularly check the integrity of the coating, and the general maintenance cycle is 3 - 5 years. -
Q: What are the requirements for the foundation when installing the sand filter tank?
A: The sand filter tank needs to be installed on a horizontal and solid concrete foundation. The load-bearing capacity of the foundation should be more than 1.5 times the weight of the tank filled with water. It is recommended to reserve a drainage ditch or floor drain to facilitate backwashing drainage. Flexible joints should be used for pipeline connection to avoid stress transfer to the tank. -
Q: How to choose the appropriate model of the sand filter tank?
A: It is determined according to the water volume of the swimming pool/hot spring pool and the pump flow rate. General experience: Circulation flow rate (m³/h) ÷ Filtration area (m²) = Filtration speed (m/h). The recommended filtration speed is 20 - 30m/h. For example, for a flow rate of 50m³/h, choose the BYS - 1200 with a filtration area of 1.13m². The filtration speed is about 44m/h, and two units in parallel can be considered. Specific detailed calculations can be provided. -
Q: Is it normal for the water to become turbid after backwashing the sand filter tank?
A: At the end of backwashing, a period of forward flushing (about 30 seconds) is required to drain the residual sewage completely before normal filtration can be carried out. If the water is turbid for a long time, it may be due to insufficient filter media or damage to the water distributor, which needs to be checked. It is recommended to check the sand layer height regularly (every 6 months) and replenish it when it is insufficient. -
Q: What is the service life of the sand filter tank with anti - corrosion coating?
A: Under normal use and maintenance conditions, the service life of the carbon steel tank itself can reach more than 20 years, and the service life of the coating is about 5 - 8 years. At that time, the coating can be re - sprayed for continued use. Compared with ordinary carbon steel tanks (without coating) that need to be replaced in 3 - 5 years, the cost - performance is remarkable. -
Q: Does the product provide customization services?
A: Yes. We provide customization services for non - standard sizes, special interfaces, special - shaped flanges, etc. We can also add accessories such as observation mirrors, sampling ports, and automatic sewage valves according to project requirements. The customization cycle is generally 10 - 15 working days.
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