Buffer Tanks

Buffer vessels with capacities ranging from 100 Litres to 100,000 Litres

Aquazone buffer vessels are designed for chilled water systems with insufficient water volume capacity. These systems require additional ‘buffer’ capacity to prevent problems, such as excessive compressor cycling, poor temperature control and erratic system operation. By incorporating a buffer tank to the system, it creates extra volume and provides additional ‘buffer’ capacity, eliminating rapid cycling of the chillers and other issues.

Masterflow Solutions offers Aquazone buffer tanks, designed to AS 1210 Unfired Pressure Vessels, Hazard Level E, and made to suit your specific requirements. Contact our trusted buffer tank suppliers to discuss your needs.

Uses of Buffer Tanks

If a large building is undergoing extensions, integrating large buffer tanks will defer the capital expenditure for a larger chiller. The tanks are insulated, which helps maintain the temperature of the stored water. This enables the chiller to perform longer and provide extra chilled water.

Buffer tanks also have other uses, including eliminating the need for low load chiller and providing chilled water storage for data centres during power failure and time delay for the generator to provide full backup power.

If sparge pipes and baffles are added, the chilled water buffer vessels can effectively act as Thermal Energy Storage Tanks. They allow the chillers to operate during off-peak hours and provide an effective strategy for energy cost reductions.

Aquazone Buffer Tanks can be manufactured in stainless steel or carbon steel, and designed to AS1210 Unfired Pressure Vessels, Hazard level E. The tanks can also be made to suit your specific requirements. Connections can be located, and diameter and height can be altered to your specification.

Note: All sizes are varied. To confirm sizing - Contact Masterflow Sales Team on 02-9748 2022 or sales@masterflow.net.au

Why Use Aquazone Buffer Tanks?

  • All Aquazone tanks are insulated to the BCA Section J requirements.
  • All Aquazone tanks have Zero Ozone Depletion Potential
  • They are aesthetically pleasing in any plant room, as they come standard with Stainless Steel cladding.
  • Due to the Stainless Steel cladding there is no need to paint them, thus providing a low maintenance exterior.
  • All Aquazone tanks have generously sized Inspection Openings.
  • Are suitable for indoor and outdoor situations.
  • Designed to AS 1210 Unfired Pressure Vessels, Hazard level E.
  • Low profile to facilitate installation in low roof plant-rooms.
  • Available in various materials and pressure ratings.
  • Standard designs and custom-made designs.


Configuration & Orientation

Aquazone tanks are available as a standard design in the vertical orientation. Sizes 4,000 litres and larger are also available in the horizontal orientation. Each orientation is available with various inlet/outlet configurations depending on the quantity and position of the inlets and outlets.

Thermal Storage Tanks

Aquazone tanks can be supplied with sparge pipes to achieve optimal circulation of water stored within the tank. This results in thermalstratification, which, together with proper insulation, provides effective thermal energy storage tanks in chilled and heating water applications.


Aquazone tanks come with standard accessories and can be provided with extras when required.

Standard accessories include:

  • Isolating valves for vent and drain nozzles
  • Pipe pieces for drain extension
  • Relief valve-pre-set

Optional accessories include:

  • Sparge pipes
  • Connectors for inlet and outlet
  • Air release valve
  • Level gauges and alarms
  • Pressure gauges and/or temperature probes
  • Provision for cathodic protection

We look forward to the opportunity of assisting you.

Please contact us with your requirements; we are always ready to listen.