Replaceable solid core filters CSR series

The replaceable solid core filters are classified as “Vessels” in the sense of Directive PED 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 fluids proper to the Group 2, as defined in Article 13, paragraph 1, letter (b), of Directive PED 2014/68/EU, therefore not toxic, not inflammable and not explosive fluids; to this macro Group belongs also the refrigerant fluids listed and classified in A1 Group of Annex E of standard EN 378-1. Examples of refrigerant fluids are:

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

– Blends HFC/HFO R448A, R449A, R450A, R452A, R513A.

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 which are made of EN 12735-1 – Cu-DHP copper tube. All the parts of the body are MIG welding with specific material. If it’s needed to replace the cores, the filtration system, including the filter tube of stainless steel AISI 430, it’s easier to replace thanks to a handle ergonomic grip. The passage of the 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 entire product range is supplied with 1/4” NPT threaded cover for mounting an access fitting. The filter can be supplied with a blind cover simply by adding the suffix ‘C’ to the product code when ordering.

  • CARTRIDGE CSR48: It’s 3Å cartridge made of 100% molecular sieve solid core, particularly suitable for HFC and POE-PAG oil.
  • CARTRIDGE CSR48A: It’s a 3Å cartridge made of 80% molecular sieve solid core and 20% of activated alumina; the presence of the latter element gives the cartridge its high characteristics deacidify while maintaining a high moisture adsorption capacity. These characteristics make the cartridge particularly suitable for fluids HCFC, CFC and based mineral oils alkylbenzene.


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.