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Help Center304 Stainless Steel Thermal Storage Tank 500L With 50mm Polyurethane Insulation for Solar Systems
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As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory presents our 304 Stainless Steel Thermal Storage Tank 500L with 50mm Polyurethane Insulation, specifically engineered for solar thermal systems. This tank combines premium corrosion-resistant stainless steel with high-density polyurethane foam to deliver exceptional heat retention and durability. With an annual export value of US$5-10 million, we serve global markets including North America, Europe, Southeast Asia, and Oceania, ensuring every tank meets rigorous quality standards.
Key Features & Technical Specifications
| Feature | Specification |
| Inner Tank Material | 304 Stainless Steel (food-grade, corrosion-resistant) |
| Capacity | 500 Liters |
| Insulation Thickness | 50mm Polyurethane (PU) foam – CFC-free, high density |
| Outer Shell | 0.5mm stainless steel or color steel (optional) |
| Max Working Pressure | 0.6 MPa (customizable up to 0.8 MPa upon request) |
| Max Working Temperature | 95°C (suitable for solar collector output) |
| Heat Loss | ≤ 3°C drop per 24 hours (ambient 20°C, water 60°C) |
| Connection Ports | 3/4" female thread (1" optional) – inlet, outlet, vent, drain, sensor sleeve |
| Installation | Vertical floor-standing or wall-mounted bracket (optional) |
Product Advantages & Benefits for Your Solar System
- Superior Heat Retention: The 50mm polyurethane foam insulation minimizes heat loss, keeping water hot for up to 48 hours, reducing backup heating demand and saving energy costs.
- Corrosion Resistance: 304 stainless steel inner tank ensures long service life even in aggressive water conditions, eliminating the need for glass lining or anode rods.
- Hygienic Water Storage: Food-grade stainless steel prevents bacterial growth and maintains water purity, ideal for domestic hot water use.
- Flexible System Integration: Multiple connection ports allow easy integration with solar collectors, auxiliary heaters, and circulation pumps – suitable for both pressurized and non-pressurized systems.
- Durable Outer Shell: Choose between stainless steel or color steel casing for weather resistance and aesthetic appeal; optional UV-resistant coating available.
- Customizable Configurations: We offer optional electric heating elements, heat exchangers (copper or stainless steel), and additional insulation layers to meet specific project requirements.
Why Choose Our 500L Thermal Storage Tank?
Our tank is designed with professionalism and reliability in mind. The 304 stainless steel construction ensures no rust or scale buildup, translating to lower maintenance and longer lifespan compared to enamel or carbon steel tanks. The 50mm PU foam is injected using a high-pressure foaming process, achieving uniform density and excellent insulation performance. With a heat loss coefficient of just 0.8 W/m²·K, your stored solar energy remains effective even during cloudy days or overnight.
For large-scale residential or commercial solar projects, the 500L capacity provides ample hot water storage, supporting multiple bathrooms or process heat applications. The tank is compatible with flat-plate collectors, evacuated tube collectors, and heat pump systems. We can also supply accessories like magnesium anode rods, expansion vessels, and control panels.
Trust & Quality Assurance from a Seasoned Manufacturer
Anping County Boli Hardware Wiremesh Products Factory has been delivering precision metal products for over 25 years. Our annual export value of US$5-10 million reflects the trust from clients across 15+ global markets, including North America, Europe, and Oceania. We ship via major ports like Tianjin, Qingdao, and Shanghai, ensuring timely delivery. Each tank undergoes strict quality control: pressure test, insulation integrity check, and surface finish inspection. Our team provides OEM/ODM services and offers samples for evaluation. Contact us today to discuss your project requirements and receive a competitive quote.
Frequently Asked Questions (FAQ)
-
Q1: What is the warranty period for this tank?
A: We offer a standard 3-year warranty against manufacturing defects. Extended warranty is available upon request. -
Q2: Can this tank be used with a heat pump instead of solar panels?
A: Yes, it works perfectly with heat pump systems as a buffer tank. Its high insulation efficiency stores heat generated by the heat pump. -
Q3: Is the tank suitable for outdoor installation?
A: The outer shell is weather-resistant, but we recommend indoor or sheltered installation for maximum lifespan. A UV-resistant outer casing is optional. -
Q4: What is the weight of the empty tank?
A: The approximate empty weight is 95 kg (209 lbs). Shipping weight includes packaging. -
Q5: Do you provide a heat exchanger inside the tank?
A: Yes, we can supply an optional stainless steel coil or copper coil heat exchanger for separate solar loop or auxiliary heating. -
Q6: How long does it take to heat the water from 15°C to 60°C using a 3kW element?
A: Approximately 12 hours with a 3kW electric element (without solar input). Actual time depends on system design. -
Q7: Can I get a custom size or capacity?
A: Yes, we offer customization for capacities from 100L to 3000L, as well as different port configurations and insulation thicknesses. -
Q8: What certifications does your factory have?
A: Our products comply with international standards. For specific certification requirements, please contact our sales team to discuss available documentation.
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