TYPE A MOLECULAR SIEVE
3A Molecular Sieve
Haina 3A (K-A) molecular sieve uses an approximately 3 Å pore opening for selective moisture removal. Larger molecules are excluded, making this grade useful where a feed stream needs drying without unnecessary co-adsorption.
| Model | 3A (K-A) |
| Effective Pore Opening | Approximately 3 Å |
| Form | Beige spherical beads |
| Specification | 1.6–2.5 mm and 3–5 mm grades in the table below |
Product Overview
The original Haina specification describes beige beads, strong water affinity, thermal stability and resistance to attrition. Its defined pore opening supports dehydration duties involving sensitive or unsaturated product streams.
Applications
Typical uses listed by Haina include unsaturated hydrocarbon feeds, solvent drying, natural-gas dehydration, food-grade carbon dioxide and aviation-fuel drying.
Technical Data
Physical Properties
| SPECIFICATION | BEADS | ||
| ITEMS | UNIT | 8*12Mesh | 4*8Mesh |
| DIAMETER | mm | 1.6–2.5 | 3–5 |
| BULK DENSITY | g/mL | 0.71–0.75 | 0.69–0.73 |
| STATIC WATER ADSORPTION | wt% | ≥21 | ≥21 |
| CRUSH STRENGTH | N | ≥25 | ≥70 |
| ATTRITION | wt% | ≤0.1 | ≤0.1 |
| MOISTURE CONTENT | wt% | ≤1.5 | ≤1.5 |
Selective Dehydration
A defined 3 Å opening supports moisture removal while excluding larger molecules.
Regeneration Performance
Haina describes stable performance through cyclic regeneration.
Mechanical Durability
Crush-strength and attrition specifications are listed for each bead size.
Storage & Selection
What information is needed to select 3A Molecular Sieve?
Please provide the feed-gas composition, desired product purity, required flow rate, operating pressure and temperature, plus the equipment configuration and cycle. For an existing system, include its current material grade and operating results. These details help Haina discuss a grade under comparable conditions.
How should I compare product specifications?
Compare values at the same test conditions and purity target. Particle size, bulk density and mechanical properties also matter to the vessel and process. The data on this page are a selection reference; request the current specification and confirm the relevant operating point before ordering.
How should unopened and unused material be stored?
Keep containers tightly sealed and dry. Prepare the equipment before opening a package, minimize exposure to humid air, and promptly reseal any unused material. Follow the product-specific storage instructions supplied with the order.
What should be checked before changing the adsorbent?
Identify the cause of the performance change first. Review feed pretreatment, moisture and oil carryover, filtration, pressure stability and the equipment cycle. Share the operating history with Haina so material selection can be discussed together with the condition of the system.
How do 3A, 4A and 5A PSA-H differ?
The Type A grades have different nominal pore openings and adsorption selectivity. Haina lists 3A for selective dehydration, 4A for deep drying, and 5A PSA-H for hydrogen purification. Choose around the feed composition and the species to remove, rather than pore size alone.
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PRODUCT & APPLICATION SUPPORT
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