Flamco - 18 Ltr - Airfix D 18 Expansion Vessel - 4 Bar

The Flamco - 18 Ltr - Airfix D 18 Expansion Vessel - 4 Bar is a pressure vessel designed to support pressure stability within the system and reduce rapid cycling.

With pressure duties up to 4 Bar, it is built to help protect connected equipment and smooth system operation.

Designed for mains-fed potable and fresh water systems, the Flamco Airfix D Expansion Vessel is a full flow-through potable vessel that prevents stagnation and nuisance safety-valve discharge by absorbing thermal expansion.

For use in potable water, or fresh-water installations.

The Airfix D expansion vessels operate in such a way that the water flows right through and they are continuously flushed with fresh water from the mains.

This prevents tepid, stagnant water from collecting in the vessel in which bacterial growth could occur.

Therefore, users can be assured of high quality potable water.

Applying an Airfix D expansion vessel to a water heater prevents the opening of the safety group or safety valve each time the potable water is heated.

A synthetic flow-through insert and the supplied brass flow-dividing T-piece (3 R ¾") divert all connection flow through the vessel, continuously flushing it to inhibit bacterial growth. The butyl diaphragm is taste/odour neutral, while corrosion-resistant internal coatings protect both water and nitrogen sides. Each vessel is factory tested, nitrogen pre-charged for longer pre-pressure retention, and internationally approved.

• Flow-through operation constant refresh prevents tepid, stagnant water
• Protects safety devices reduces safety-valve lift and leakage risk
• Potable-safe butyl diaphragm adds no colour, odour or taste
• Efficient & hygienic no waste of potable water during operation
• Durability vessel halves coated before assembly; clamp ring protected
• Nitrogen pre-charge for better long-term pressure stability
• Includes: special brass flow-dividing T-piece (3 R ¾")
• Optional: Airfixcontrol for quick annual pre-charge checks

Key Product Features

• Application: potable/fresh water heaters and sealed domestic/commercial systems
• Design: full flow-through via synthetic insert and supplied T-piece
• Hygiene: continuous flushing helps suppress bacterial growth
• Materials: butyl rubber diaphragm; corrosion-resistant internal coatings
• Pre-charge: nitrogen filled for longer retention
• Approvals: internationally approved and certified components
• Maintenance: compatible with Airfixcontrol for easy yearly checks
• Water type: Clean or Discoloured

Flamco (est. 1956) is a Dutch manufacturer of HVAC and plumbing system components, including expansion vessels, air separators and pressurisation accessories. Their ranges are used in heating and chilled-water circuits and potable water systems across domestic and commercial installations.