APT-18SS is an elite-tier pressure tank constructed entirely from high-quality 304 stainless steel, engineered specifically to deliver exceptional durability and anti-rust performance in harsh environments and specialized commercial applications.
APT-18SS has a total volume of 18 liters (4.5 gallons). The tank is designed for a robust maximum operating pressure of 10 bar (150 psi) and a maximum operating temperature of 90 °C (194 °F). To ensure highly stable and reliable system performance, it is factory pre-charged to 2 bar (30 psi) with nitrogen gas.
With a diameter of 28.0 cm (11.0 inches) and a height of 36.0 cm (14.2 inches), this mid-sized premium tank features a meticulously polished mirror-like surface, making it the perfect choice for demanding environments that require both peak functionality and pristine aesthetics.
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Product Overview
The APT-18SS is an 18-liter (4.5 gallon) premium diaphragm pressure tank that represents the peak of Aquasky's engineering. Unlike standard carbon steel tanks, the PREMIUM-PLUS Series is manufactured entirely from top-grade 304 stainless steel. This ultimate anti-rust construction ensures that the APT-18SS thrives in specialized applications and harsh environments where standard tanks would rapidly degrade, such as food processing equipment, commercial beverage dispensing, and sea water storage on yachts.
Inside the flawlessly polished mirror-finish shell, the APT-18SS utilizes a heavy-duty butyl rubber diaphragm designed for long-lasting resilience. The superior materials guarantee that the tank remains exceptionally durable and hygienic, catering specifically to premium users who demand the highest quality and absolute reliability without compromise.
Manufactured with precision, the Aquasky PREMIUM-PLUS tanks are designed to exceed expectations in both performance and longevity, making them an indispensable asset for elite commercial, industrial, and marine systems.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | APT-18SS |
| Total Tank Volume | 18 liters / 4.5 gallons |
| Diameter | 28 cm / 11.0 inches |
| Height | 36.0 cm / 14.2 inches |
| Net Weight (NW) | 2.91 kg / 6.42 lbs. |
| Gross Weight (GW) | 3.28 kg / 7.23 lbs. |
| Shipping Volume | 1.08 CUF |
| Operating Temperature | 90°C / 194°F |
| Factory Pre-charge | 2 bar | 30 psi |
| Max. Operating Pressure | 10 bar | 150 psi |
| Connection | 1” NPT / BSP Stainless Steel |
| Diaphragm Material | Heavy-Duty Butyl Rubber |
| Tank Body Shell | High-Quality 304 Stainless Steel |
| External Finish | Mirror-Polished Surface |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the PREMIUM-PLUS Pressure Tank Works
The APT-18SS operates by storing fluid securely against the heavy-duty butyl rubber diaphragm, separated from the pre-charged nitrogen air cushion. As system pressure fluctuates, the nitrogen compresses to safely absorb and maintain pressure levels. What sets the PREMIUM-PLUS apart is its exterior resilience; the 304 stainless steel shell allows this internal mechanical process to occur flawlessly even when the tank is constantly exposed to sea spray, high humidity, or rigorous sanitary washdowns.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
A: The APT-18SS is part of our PREMIUM-PLUS series, meaning it is constructed entirely from high-quality 304 stainless steel. This provides incredible anti-rust capabilities and a polished mirror finish, making it mandatory for harsh environments, food equipment, beverage systems, or yacht installations where standard tanks would rapidly degrade.
A: The APT-18SS is engineered to safely handle a maximum operating pressure of 150 PSI (10 bar) and can withstand operating temperatures up to 90 °C (194 °F).
A : Yes, absolutely. The 304 stainless steel construction makes the APT-18SS highly resistant to corrosion, making it perfectly suited for storing sea water on yachts or operating in highly saline coastal environments.
Downloads & Certification Links