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.
Why a filter drier is essential
A filter drier removes moisture and solid contaminants from the refrigerant circuit, preventing ice blockage and corrosion to keep the compressor running reliably.
How to choose a filter drier
Selection depends on refrigerant type, tube size, system capacity and operating conditions; Kilterra offers a full range with OEM customization.
Kilterra refrigeration filter driers are available in a wide range of tube sizes and connection types, with OEM customization supported worldwide.
As a core component of air conditioning and refrigeration systems, Kilterra filter driers are manufactured to international standards and compatible with R134a and R410A refrigerants.
How It Works
Refrigerant circulating in the line carries three harmful substances: moisture, debris and acid. Inside the filter drier, molecular sieve adsorbs water, the filter screen traps solid particles, and activated alumina neutralizes acid. It does not take part in cooling, but without it, moisture freezes at the expansion valve (ice blockage), debris wears the valve plates, and acid corrodes the motor windings - the compressor becomes the first victim.
Key Applications
- Commercial air conditioning and chillers
- Cold storage and cold chain equipment
- Ice makers and soft-serve machines
- Heat pump heating and hot water systems
- Industrial refrigeration and cold rooms
- Automotive and transport refrigeration
Frequently Asked Questions
- 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.