Danfoss 023Z500991 DCL 164 hermetic filter drier for refrigerant liquid lines. Solid-core sealed steel-shell drier with 16 cubic inch (128 cm3 / 7.84 in3) core volume. Connection: 1/2 inch (12 mm) flare inlet and outlet. Internal desiccant composition: 20 percent activated alumina + 80 percent molecular sieve for combined moisture and acid removal. Acid capacity 3.11 g. Maximum working pressure 46 bar (667 psig). Operating temperature range -40 C to +70 C (-40 F to +160 F). Refrigerant compatibility (verified from Danfoss store product page): R134a, R32, R404A, R407A / C / F / H, R410A, R422B / D, R438A, R444B, R448A, R449A / B, R450A, R452A / B, R454A / B / C, R455A, R463A, R507A, R513A, R515A / B, R516A, R1233zd(E), R1234yf, R1234ze(E), R125, R23, R22 / R407C. Approvals: UL (approval file SA6398, UL mark present on product), UA. Applications: commercial and industrial refrigeration, air conditioning, marine reefer plant, provision-room cooling, HVAC secondary loops. Suitable for both new installations and refrigerant-transition service (HFC to HFO retrofit). The DCL is Danfoss's solid-core hermetic (non-serviceable) filter drier line — the alternative to the serviceable DCR shell-and-core design. Use DCL when core replacement is not part of the maintenance schedule; use DCR when scheduled core replacement is planned. Sister part numbers in the same DCL 164 size range (1/2 inch): DCL 164 flare (023Z500991, this product), DCL 164s solder (023Z4523), DCL 164 LD (023Z4523 / 023Z5009 variants). Adjacent sizes: DCL 083s (3/8 inch, 8 cu.in.), DCL 305s (5/8 inch, 30 cu.in.), DCL 307s (7/8 inch, 30 cu.in.).