Replaceable core filters CSR PLUS series

The replaceable core filters are classified as “Vessels” in the sense of PED Directive 2014/68/EU, Article 2, paragraph 2 and are subject to Article 4, paragraph 1, letter (a), of the same Directive.

All the products range is suitable for use with fluids proper to the Group 1 and 2, as defined in Article 13, paragraph 1, letter (a) and letter (b), of PED Directive 2014/68/EU with reference to Regulation (EC) n.1272/2008, in accordance with safety classification A1, A2L and A3 in Annex E of standard EN 378-1:2016. Examples of A1 and A2L refrigerant fluids are:

– HFC R32, R134a, R404A, R407C, R410A, R507;

– HFO R1234yf, R1234ze and blends HFC/HFO R448A, R449A, R450A, R452A, R452B, R445A, R454B, R454C, R513A.

Examples of A3 refrigerant fluids are (HC hydrocarbon):

– R290, R600, R600a, R1270;

The function of these filters is to protect the system from solid contaminants, absorb moisture to prevent the formation of acids that damage the compressor, avoid the formation of ice and the consequent reduction in the efficiency of the system.


The filters are made entirely in steel, with the exception of the solder connections, that are made of EN 12735-1 – Cu-DHP copper tube. All the parts of the body are MAG welding with specific filler material. If it’s needed to replace the cores, the filtration system, including the filter tube of stainless steel AISI 430, it’s easy to replace thanks to a handle ergonomic grip. The passage of fluid takes place in parallel and therefore, in the case of multiple filters cartridges, the pressure drop does not increase with the number of cartridges.

NOTE: The whole products range is supplied with ¼” NPT threaded cover for mounting an access fitting (see KIT-A).


The CSR filters can be installed with the longitudinal axis arranged both horizontally and vertically, in this last case the arrow on the label must be facing downwards. Provide adequate filter fastening and vibration damping systems for connected piping to avoid loads on connections welds. To allow an easily cartridges extraction the choice of installation location must contemplate the distance ‘K’ (see technical datasheet). Considering the importance of filters inside the refrigeration system, we suggest defining a maintenance program to ensure the correct functioning of the system.