Filter driers MSD series

The filter driers are classified as “Vessels” in the sense of the 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 Group 2, as defined in Article 13, paragraph 1, letter (b), of Directive PED 2014/68/EU with reference to the Regulation (EC) n. 1272/2008, according to safety classification A1 in Annex E of the standard EN 378-1:2016. Examples of refrigerant fluids are:

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

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

The function of the dehydrating filter is to protect the system from moisture, acids and solid contaminants. Moisture can cause the formation of ice, a reduction in efficiency of the system and the formation of acids, resulting in damage to the compressor.


All types of filter driers have bodies and heads made of steel UNI EN 10130 – DC04. The assembly of the two parts is done by MIG or TIG without filler material soldering, thus creating a single body very strong and seamless. In this series of filters, the dehydrating element is composed of beads from 3 Å molecular sieve. The design of the casing steel is designed to prevent the detachment of the balls also avoiding that the solid components enter the equipment. The particularity of this filter is that not being present the binder material is a greater surface and then dehydrating a higher speed of adsorption of moisture. The product range, as well as versions with SAE Flare threaded nickel-plated steel, expected accomplishments with solder copper-plated steel.


To optimize the performance of the filter is recommended to be mounted with the longitudinal axis vertical while the arrow points down. For the series MSD are not recommended installations in plants subjected to phenomena of strong vibrations to avoid excessive rubbing and therefore the consumption of the beads of the molecular sieve. Considering the importance of the filters within the system it is recommended to provide for scheduled maintenance to check the correct function of the system.