The filter drier is the goalkeeper of a refrigeration system. It intercepts moisture, contaminants and acid in the refrigerant line before they reach precision parts such as the compressor. Kilterra KLD/KLE liquid-line filter driers combine high-efficiency molecular sieve with activated alumina for one-step drying and filtration, widely used in commercial air conditioning, chillers and ice makers.
Recommended Maintenance Schedule
- Check every 2-3 years on normal units; replace when pressure drop rises or desiccant discolors
- Always replace after major system repair or compressor replacement
- Foggy sight glass and large inlet-outlet temperature difference are failure signals
- Replace after topping up refrigerant or touching the line - low cost, high protection
Daily Inspection Points
- Install on the liquid line between condenser and expansion valve, direction per arrow mark
- Cool the shell during brazing to protect the desiccant from heat damage
- Close both valves before replacing a replaceable-core drier
- Never reverse inlet/outlet, or the desiccant saturates prematurely
Maintenance FAQ
- How often should a filter drier be replaced? - Every 2-3 years normally; immediately after major repair or moisture ingress.
- How do I know the drier is blocked? - Feel the inlet/outlet temperature difference: hot in, cold out means blockage.
- Can an R22 drier be used in an R32 system? - No, pressure rating and desiccant formula differ.
- What does discolored desiccant mean? - Moisture saturation, water content exceeded - replace now.
For 37 years Kilterra has focused on one thing: build refrigeration components right, deliver them on time. Filter Drier supports OEM/ODM customization - factory visits, sample testing and volume partnerships are welcome.