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The replaceable solid core filters of CSR..CO2, CSR..CO2S series are classified as “Vessels” in the sense of PED Directive 2014/68/EU, Article 2, paragraph 2 and are subject of Article 4, paragraph 1, letter (a), of the same Directive. All the product range is suitable for use with refrigerant R744 (CO2), classified in Article 13, paragraph 1, letter (b), of Directive PED 2014/68/ EU as part of Group 2, therefore not toxic, not inflammable and not explosive fluid and indicated in A1 Group of Annex E of standard EN 378-1.
In accordance with Directive 2014/68/EU, the hazard classification of the product depends on:
• Type of fluid intended for use (R744);
• Intrinsic dimensions (volume, in this case);
• Maximum design working pressure (PS).
In the case of the CSR..CO2, CSR..CO2S filters, the internal volumes of the entire series vary from 1.6 litres for the smallest ones to 1,9 litres for the larger versions, while the maximum operating pressures, indicated in the reference tables, do not exceed 90 bar. In accordance with Table 2 of Annex II of Directive 2014/68/EU, all products are classified as Category I and must bear the CE mark of European Conformity which will prove their design according to the Directive mentioned above.
The external shell and the upper flange of these filters are made entirely of steel, but the material of the connections depends on the specific series:
• CSR..CO2 series: stainless steel pipe in AISI 304.
• CSR..CO2S series: steel pipe UNI EN 10216-3 – P355NL1.
The outer shell is entirely covered with more than 70 μm of powder coating which ensures complete protection against oxidation, while the upper flange is zinc plated. The entire range of products is supplied with a blind flange, but on demand it’s possible to have ¼ “NPT perforated upper flange, for a possible assembly of a service port.
Its installation is necessary to protect the system from humidity, acids, and solid contaminants, which can cause not only a reduction in overall efficiency but also serious damage to the compressor as well as to all elements of the system.
The choice of the installation position, allowed both vertical or horizontal, must consider the distance ‘K’ (see table and drawing) to allow the extraction of the filtering unit without difficulty; moreover, the direction of the flow must be in accordance with the arrow on the label.