Sealed systems will use a compressor to provide automatic replacement of water losses and ensure that minimum head requirements are maintained. Dedicated expansion vessels must also be installed to deal with the expansion and contraction effects of the liquid caused by the change in heating temperature across the entire operating temperature range of the sealed heating system.
In RTP we recommend the use of closed systems. It takes up less space, helps clean the system, improves water quality and reduces oxygen intake.
Closed systems can also be supported using aluminum reinforced polypropylene pipes and polyethylene PEXa/EVOH pipes. As these two types of pipes, unlike other polymer pipes, do not have this feature. Closed systems and with these two types of pipes form an integrated system that prevents oxygen from penetrating the heating system, and if oxygen penetrates, it will be in very small proportions. This gives the system complete protection from oxidation, which ultimately extends the life of the system.
✔ Aluminum reinforced Polypropylene pipes.
✔ Cross-Linked Polyethylene PEXa Pipes with EVOH Layer.
Both types of pipes mentioned above meet the requirements of minimum oxygen permeability and are recommended for the installation of closed type of central heating systems.
Our company produces perforated aluminum reinforced polypropylene PPR pipes with outer diameter from 20 to 63mm, and PE-Xa / EVOH cross-linked polyethylene pipes diameters from 16 to 32mm.
And what's about Brass Axial Press Fittings which our company manufacture are the ideal choice for polyethylene pipes, as they together form a sealed anti-oxygen system.
As for the normal non-reinforced polypropylene pipes, "PPR" is also suitable for closed heating systems, as the percentage of oxygen permeability for these pipes remains below the permissible rate.
Our manufacturer now requires closed systems to ensure system cleanliness and boilers protection.
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