The SP-60 is a 60-liter (14 gallon) expansion vessel designed for closed-loop solar hot water systems. It effectively manages temperature fluctuations to maintain safe pressure levels and protect the system from excessive variations.
Built for extreme environments, the tank supports up to 10 bar (150 psi) and 130°C (266°F). It is factory pre-charged to 3.5 bar (50 psi) with 100% nitrogen gas to ensure stable performance and prevent thermal pressure spikes.
With a 39.0 cm diameter, the SP-60 is ideal for robust, high-capacity solar setups. It supports thermal expansion for water heaters up to 120 gallons, providing a reliable and durable solution for demanding solar applications.
Product Overview
The SP-60 is a 60-liter (14 gallon) diaphragm expansion tank designed to provide industrial-grade protection for large-scale solar thermal systems. It masterfully absorbs the high volumetric expansion of water-glycol mixtures, preventing over-pressure during stagnant peak solar gain and ensuring the system remains pressurized during freezing conditions.
The tank features a heavy-duty cold-rolled steel shell with a professional Red (RAL 3011) epoxy finish for maximum environmental protection. Internally, it is equipped with a high-temperature resistant liner and a premium EPDM diaphragm (DIN 4807), specifically engineered to handle the intense thermal cycles and chemical aggressiveness of large-volume solar loops.
Equipped with a 1" 304 stainless steel connector, the CE and ISO 9001 certified SP-60 provides a lead-free and perfectly secure interface. This high-capacity vessel is the ideal solution for large residential complexes or commercial solar plants, ensuring long-term safety, durability, and system efficiency.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | SP-60 |
| Total Tank Volume | 60 liters / 14 gallons |
| Diameter | 39.0 cm / 15.4 inch |
| Height | 59.0 cm / 23.2 inch |
| Net Weight (NW) | 9.4 kg / 20.7 lbs. |
| Gross Weight (GW) | 10.7 kg / 23.6 lbs. |
| Shipping Volume | 3.5 CUF |
| Operating Temperature | 1 - 130°C / 34 - 266°F |
| Factory Pre-charge | 3.5 bar | 50 psi |
| Max. Operating Pressure | 10 bar | 150 psi |
| Connection | 1” NPT / BSPT Stainless Steel |
| Liner Material | Polypropylene |
| Diaphragm Material | EPDM Rubber |
| Shell | Cold Rolled Carbon Steel |
| External Coating | Triple Grade Blue Paint |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the Solar-Plus Pressure Tank Works
In closed-loop solar systems, the heat transfer fluid (often a water/glycol mix) expands significantly as it absorbs intense heat from solar collectors. The SP-60 manages this by storing the expanded fluid against the high-temperature EPDM rubber diaphragm, pushing against the nitrogen-filled air cushion. This safely relieves pressure. When the system cools—such as at night or in freezing temperatures—the nitrogen cushion forces the fluid back into the pipes, preventing the pressure from dropping dangerously low.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
A: To safely handle the weight and pressure of a 120-gallon solar system, the 14-gallon SP-60 utilizes a floor-standing design with an integrated base. It manages extreme internal forces using a heavy-duty Cold Rolled Carbon Steel shell rated for 150 PSI (10 Bar) and a highly stable 50 PSI 100% Nitrogen pre-charge. Furthermore, it processes high-volume expanding fluids using a robust 1-inch stainless steel connector and a high-temperature EPDM rubber diaphragm rated for 130°C (266°F).
A: Yes, starting with the SP-60, these models are designed as floor-standing units equipped with a sturdy integrated base to safely support their larger size and heavier fluid weight.
A : Yes. The SP-60’s high-grade EPDM diaphragm is fully compatible with propylene glycol concentrations up to 50%. Its high-density material prevents the diaphragm from swelling or losing elasticity when exposed to the high chemical concentrations necessary for protecting outdoor solar arrays in freezing climates.
Customized Colors & Packaging
We offer a wide range of customization options to match your exact needs - from custom colors to branded packaging and logo design.
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Downloads & Certification Links