Danfoss 023Z506891 DML 165S Filter Drier – 5/8" ODF Brazed, 46 bar

Danfoss 023Z506891 (type DML 165S) is a 5/8" (16 mm) ODF brazed hermetic filter drier fitted in the liquid line. Its solid core is 100% molecular sieve.

Retains Moisture and Dirt — Solid Core, 100% Molecular Sieve

Moisture remaining in the circuit combines with the refrigerant and oil to produce acid; the acid destroys first the winding insulation and then the compressor. Moisture also freezes and blocks the line at the outlet of the expansion valve. The filter drier eliminates both risks at once.

In the Danfoss ELIMINATOR® series, the core is not loose granules but a single sintered block. The granules do not rub against each other and produce dust, the core does not collapse over time and no channels form — filtration stays the same throughout its life.

Technical Specifications (Official Danfoss DML/DCL Document)

• Danfoss code: 023Z506891 | Type: DML 165S
• Connection: 5/8" (16 mm) ODF solder, both ends the same size
• Total length: 160 mm | Shell length: 136 mm | Net weight: 0.66 kg

Technical Specifications (Official Danfoss DML/DCL Document)

• Core: solid core — not loose granules, a single sintered block
• Desiccant: 100% molecular sieve (the distinguishing feature of the DML series)
• Core surface: 220 cm² | Core volume: 134 cm³
• Shell volume: 0.36 L (gross) · 0.226 L (net)
• Shell diameter: D1 80 mm / D2 76 mm
• Max. working pressure (PS): 46 bar
• Temperature range: −40 … +70 °C
• Certification: PED approved (PS 46 bar)

• 🔑 DML or DCL? The DML core is 100% molecular sieve — giving the highest moisture retention capacity. DCL contains 80% molecular sieve + 20% activated alumina; the alumina retains acid. If acid is suspected in the system (after a compressor burn-out), choose DCL; for pure moisture protection, choose DML.
• ⚠️ Arrow direction is essential: the arrow on the body shows the flow direction. A filter drier installed in reverse releases the dirt it has retained back into the system.
• Installation location: in the liquid line, before the sight glass and the expansion valve.
• ⚠️ Brazing warning: wrap the body in a wet cloth while brazing. Excessive heat damages the core; it can no longer do its drying job.
• After a compressor burn-out, the filter drier MUST be renewed — the old core is loaded with acid and will destroy the new compressor too.

• Note: For the DML 165S of the same size, Danfoss order code 023Z458191 is also available and is listed as a separate product in our catalog. The technical specifications are the same; choose whichever order code you have.