HP-120 is designed specifically to absorb expanded fluid in closed-loop residential or commercial hydronic heating and cooling systems, effectively regulating pressure buildup and ensuring system safety.
HP-120 has a total volume of 120 liters (32 gallons). The tank is designed for a maximum operating pressure of 10 bar (150 psi) and a maximum operating temperature of 130 °C (266 °F). It is factory pre-charged to 1 bar (15 psi) for stable system performance and is fully compatible with propylene glycol mixture concentrations of up to 50%.
With a diameter of 39.0 cm (15.4 inches) and a height of 113.9 cm (44.8 inches), this tall, stand-model tank comes with a heavy-duty base, providing massive expansion absorption for demanding commercial and large-scale residential climate-control systems.
Product Overview
The HP-120 is a 120-liter (32 gallon) hydronic expansion tank engineered specifically for closed-loop hydronic heating and cooling systems. As the fluid in your climate-control system changes temperature, it expands and contracts; the HP-120 safely absorbs this expanded fluid volume, effectively controlling the excessive pressure generated inside the system and preventing potential hazards.
Built with a robust sheet steel tank, the HP-120 utilizes a specialized, high-temperature-resistant EPDM rubber diaphragm to ensure exceptionally safe and reliable operation. To guarantee supreme durability, every single Hydro-Plus model is subjected to rigorous hydraulic testing at a pressure 1.5 times higher than the design pressure.
Manufactured with premium materials, welded according to strict ASME & EN procedures by certified welders, and compliant with IAPMO and EN standards, Aquasky HYDRO-PLUS tanks are the ultimate safety choice for your hydronic heating system, delivering a long service life and dependable performance.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | HP-120 |
| Total Tank Volume | 120 liters / 32 gallons |
| Diameter | 39 cm / 15.4 inches |
| Height | 113.9 cm / 44.8 inches |
| Net Weight (NW) | 19.7 kg / 43.4 lbs |
| Gross Weight (GW) | 22.3 kg / 49.2 lbs |
| Shipping Volume | 6.55 CUF |
| Max. Operating Temperature | 130°C / 266°F |
| Factory Pre-charge | 1 bar | 15 psi |
| Max. Operating Pressure | 10 bar | 150 psi |
| Connection | 1" Cacbon Steel / Stainless Steel |
| Diaphragm Material | High-temperature resistance EPDM Rubber |
| Tank Body Shell | Cold Rolled Carbon Steel |
| External Coating | Gray Paint |
| Air Nozzle Protection | Brass cap with internal O-ring |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the HYDRO-PLUS Pressure Tank Works
In closed hydronic heating and cooling systems, fluid volume changes drastically as the temperature rises and falls. The HP-120 safely absorbs this expanded fluid using a sealed, compressible air cushion space. It stores the fluid securely against the high-temperature EPDM rubber diaphragm, while the air chamber compresses to accommodate the volume change. This mechanism seamlessly controls excessive pressure, protects valves and piping, and maintains safe system parameters without venting fluid.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
A: Yes, the HP-120 features a slimmer 15.4-inch diameter (compared to the 17-inch HP-100), achieving its 32-gallon capacity by being taller (44.8 inches) to save valuable floor space.
A : Absolutely. Its 120-liter volume and compatibility with 50% glycol mixtures make it a perfect fit for large-scale cooling plants and district heating networks. It provides the robust pressure stabilization needed to protect expensive commercial chillers and industrial boilers from thermal shock and pressure spikes.
Downloads & Certification Links