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Refrigeration, building & cryogenics
Molecular Sieve for Automotive AC Receiver-Driers
Core Adsorbent supplies refrigerant-grade 3 Å molecular sieve for automotive air-conditioning receiver-driers and accumulators.
3 Å
Refrigerant-grade sieve
≥ 21.5 %
Static water adsorption
15–35 days
Delivery time
1 t
MOQ per grade
01 Overview
Which molecular sieve is used in automotive AC receiver-driers?
Automotive AC receiver-driers and accumulators use refrigerant-grade 3 Å molecular sieve beads. Water enters the 3 Å pore while R-134a and other refrigerants stay outside, so moisture is removed without co-adsorbing the refrigerant, protecting the system from ice blockage and acid corrosion.
| Desiccant | Molecular Sieve for Refrigerant |
| Pore | 3 Å |
| Refrigerants | R-134a and other HFCs |
| Form | Beads in desiccant bags or cartridges |
| Key property | Low dust, high crush strength |
02 Challenges
What does moisture do to an AC system?
Small amounts of water cause big problems.
Ice at the expansion valve
Moisture freezes and blocks refrigerant flow.
Acid and sludge
Water reacts with refrigerant and oil to form acids.
Dust
Weak beads produce dust that blocks orifices.
Vibration
Vehicle vibration abrades the desiccant.
03 Solutions
Where the sieve is used
01
Receiver-driers
Typical requirement: dry liquid refrigerant
- Molecular Sieve for Refrigerant — 3 Å beads in bags or cartridges
02
Accumulators
Typical requirement: dry refrigerant on the suction side
- Molecular Sieve for Refrigerant — low-dust beads
03
Aftermarket parts
Typical requirement: replacement driers
- Molecular Sieve for Refrigerant — consistent bulk supply
04 Selection guide
Refrigerant desiccant selection
Full specifications are on each product page.
| Product | Use | Key figure |
|---|---|---|
| Molecular Sieve for Refrigerant | Automotive and stationary AC driers | Static H₂O ≥ 21.5 % |
| 3A Molecular Sieve | General 3 Å drying | 3 Å pore |
05 Key properties
Refrigerant sieve data
3 Å
Excludes refrigerant molecules
≥ 21.5 %
Static water adsorption (RH 75 %, 25 °C)
Low dust
For bagged desiccant
COA
Lot test report with every shipment
Full data: Molecular Sieve for Refrigerant.
06 From our plant
What you receive
The adsorbent, the packing and the plant it ships from.
Photos are replaced with real product, packing and plant images as they become available.
07 Support
Customisation and engineering support
- Component supply — send your bag or cartridge specification; we supply matching bead size in bulk.
- Grade matching — send the data sheet of the product you use now; we propose an equivalent grade.
- Consistent bulk supply — lot-tested product for component manufacturers.
- Packing — sealed drums or bags that keep the product dry; samples from 5–10 kg.
08 Related solutions
More refrigeration, building and cryogenics solutions
09 Recommended products
Products for automotive AC receiver-driers
10 FAQ
Molecular Sieve for Automotive AC Receiver-Driers FAQ
Can’t find your answer? Ask our sales engineer.
Which refrigerants is it compatible with?
R-134a and other HFC refrigerants; confirm for your refrigerant and oil.
Why 3 Å for refrigerants?
It admits water and excludes refrigerant molecules.
Do you supply bead sizes for bags?
Yes, matched to your desiccant bag specification.
How should beads be stored?
In sealed packing; fill driers soon after opening.