Pressure vessel AQUA OLA 150l with manometer standing

Product detailed description

Vertical expansion tanks are essential components in pressurised water systems where volume compensation and pressure stabilisation are required. This model is suitable for residential and commercial buildings where water is drawn from wells or pumped from storage reservoirs. It integrates into systems with submersible, surface or booster pumps, provided the system pressure does not exceed the tank’s operational limits. The tank supports consistent pressure levels and reduces pump cycling, which extends the life of the entire system. Proper sizing and installation ensure the tank functions efficiently in both domestic and light industrial environments.

The AQUA OLA 150L tank is commonly used in residential water supply systems, pressure boosting systems and small-scale industrial applications. It is particularly useful in systems where the pump starts and stops frequently. By providing a buffer for water expansion and contraction, the tank helps maintain stable pressure and prevents unnecessary strain on the pump and associated components. It is also suitable for systems where water is intermittently supplied or where demand fluctuates significantly over time.

Technical parameters

The tank’s 150L capacity allows for effective pressure stabilisation in medium-sized systems. The working pressure limit of 6 bar means it is compatible with most standard domestic and light industrial pumps. The EPDM bladder ensures chemical compatibility with potable water, and the pre-charged air pressure of 2 bar from the factory provides initial system balance. These parameters are critical for selecting the correct tank size and ensuring long-term performance in pressurised water systems.

Installation and connection

Installation should be carried out in a dry, accessible location to allow for routine checks and maintenance. The tank should be mounted vertically, as specified in the design. Connections are made via threaded ports, typically using 1/2 inch or 3/4 inch pipe threads depending on the system layout. Before connecting, verify that the tank’s pre-charge pressure matches the system requirements. A manometer is included to monitor internal pressure during operation. Common installation errors include incorrect orientation, failure to check the initial air pressure, and connecting to a pump with higher pressure than the tank can handle. Always ensure the tank is fully drained before maintenance or replacement.

Compatibility and accessories

This expansion tank is compatible with all pump types that operate within the 6 bar pressure range. It requires standard plumbing fittings for installation, such as unions, pipe clamps and isolation valves. Additional components such as pressure switches, non-return valves and control panels may be needed depending on the system configuration. No specific accessories are required for the EPDM bladder, as it is self-contained and does not require external maintenance. Ensure that all components are rated for the same pressure and temperature conditions as the tank itself.

Technical background for designers

The AQUA OLA 150L tank operates on the principle of separating water and air using an EPDM bladder. As water enters the tank, it compresses the air in the upper chamber, maintaining pressure in the system. The bladder prevents direct contact between water and the steel tank wall, reducing corrosion and ensuring the integrity of the potable water supply. The tank is constructed from steel and is designed to withstand repeated pressure cycles. The service life is influenced by factors such as system pressure stability, frequency of pump cycling and the condition of the bladder. For optimal performance, the tank should be sized according to the expected volume changes in the system and the pump’s flow rate.

Service and operation

Routine maintenance includes checking the air pressure in the tank every six months. The pressure should be adjusted to match the system requirements if it deviates from the initial 2 bar setting. A drop in pressure indicates air leakage and may require recharging. The manometer allows for quick visual confirmation of pressure levels. No other maintenance is required for the bladder itself, as it is sealed and does not require refilling. The tank should be inspected annually for signs of wear, corrosion or leaks. If the bladder ruptures, the tank must be replaced immediately to prevent contamination and system failure.

Frequently asked questions

Can the AQUA OLA 150L tank be used with a pump that delivers more than 6 bar?
No, the tank is designed for a maximum operating pressure of 6 bar. Exceeding this limit will cause the bladder to stretch and eventually fail.

What happens if the air pressure in the tank drops below the initial setting?
If the pressure falls below the recommended level, the tank’s ability to stabilise pressure decreases. This can lead to increased pump cycling and reduced system efficiency.

Is the EPDM bladder suitable for all types of water?
Yes, the EPDM material is chemically resistant and approved for potable water use. It does not react with common water constituents and maintains its integrity over time.

How often should the air pressure be checked?
The pressure should be checked approximately every six months to ensure it remains at the initial 2 bar setting. Adjustments may be necessary depending on system usage and environmental conditions.