Bi-flow hermetic filter driers - CASTEL S.r.l. - Refrigeration and air conditioning components

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Bi-flow hermetic filter driers 

The filters in series DB3 illustrated in this brochure are designed to be installed on the liquid line of air conditioning systems with reverse-cycle, heat pumps, and refrigeration plants that use the following refrigerant fluids:
• HCFC (R22)
• HFC (R134a, R404A, R407C, R410A, or R507)
• HFO and HFO/HFC mixtures (R1234ze, R448A, R449A, R450A, and R452A) belonging to Group 2, as defined in Article 13, Chapter 1, Point (b) of Directive 2014/68/EU, with reference to EC Regulation No. 1272/2008. The filters can be installed on systems that use the following refrigerant fluids:
• HFC (R32)
• HFO (R1234yf) classified as A2L in the ASHRAE 34-2013 standard, and belonging to Group 1, as defined in Article 13, Chapter 1, Point (a) of Directive 2014/68/EU, with reference to EC Regulation No. 1272/2008. For specific applications with refrigerant fluids not listed above, please contact Castel Technical Department.


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