4A Molecular Sieve
Packing and typical duty
Before you order
- Compare this grade with the others — pore size, what it adsorbs and the regeneration temperature
- Packing, lead time and Incoterms — 25 kg bags, drums or big bags, 1,000 kg minimum
- Request a sample — 0.5–1 kg from production with its certificate of analysis
4A Molecular Sieve
4A molecular sieve is the sodium form of zeolite type A. Its 4 Å pore opening accepts water, methanol, ethanol, H2S, SO2 and CO2, and it is the most widely used general-purpose drying grade for air, natural gas, refrigerants, solvents and static moisture control in packaging.
Specification (typical values)
| Parameter | Typical value |
|---|---|
| Type | 4A (sodium form of type A) |
| Nominal pore opening | 4 Å |
| Form | Spheres / pellets |
| Typical sizes | Spheres 1.6–2.5 mm, 3.0–5.0 mm; pellets 1/16", 1/8" |
| Bulk density | ≥0.66 g/ml (typical 0.66–0.70) |
| Static water adsorption | ≥21 wt% (typical 21–22) |
| Static methanol adsorption | ≥12.5 wt% (typical 12.5–15) |
| Crush strength | ≥30 N (2–3 mm); ≥80 N (3–5 mm) |
| Attrition loss | ≤0.2 wt% |
| Moisture as packed | ≤1.5 wt% |
Typical values for this grade, taken from commonly published industry data and the standard shown below. The values actually delivered are those measured on your lot and reported on its certificate of analysis.
Reference standard: HG/T 2524-2010
Typical applications
Natural Gas
Dehydration to pipeline dew point, with removal of CO2 and sulfur compounds.
General Drying
Compressed air, process gases, refrigerants, solvents and liquids.
Static Moisture Control
Pharmaceutical, electronics and food packaging, and sealed systems.
Packing
25 kg carton or paper-plastic composite bag with moisture-barrier liner; 130–150 kg sealed steel drum; 750–1,000 kg big bag.
Minimum order 1,000 kg per grade. Private-label packing and documents in the buyer’s name are available for distributors.
Documents
- Technical Data Sheet (TDS) — typical specification for this grade — Download PDF
- Safety Data Sheet (SDS) — in the format required by the destination market — Download PDF
- Certificate of Analysis — issued per lot, from the measured batch results
Factory-direct supply
Manufactured at our own plant in Zhengzhou, Henan
6,000 tonnes of annual capacity. We test every lot before release and ship with a lot-specific COA. Buyers may audit the plant or appoint their own inspector.
How this grade ships
Frequently asked questions
When is 4A preferred over 3A?
When the stream contains no molecules that 4A would co-adsorb harmfully, and you want the higher capacity and wider adsorption range of the 4 Å opening — for example in open gas drying rather than in a sealed glazing cavity.
Can 4A remove CO2 and H2S?
Yes, both are adsorbed within the 4 Å opening, which is why 4A is used for natural gas sweetening as well as dehydration.
What is the minimum order and packing?
1,000 kg per grade, in 25 kg cartons or bags, 130–150 kg steel drums or 750–1,000 kg big bags.
Where this grade is used
- Natural gas dehydration — the standard desiccant for gas and air drying where a 4 Å pore is acceptable
- Industrial drying — general drying of gases, liquids and refrigerant streams
- Not sure which duty fits — compare all applications
Ask for this grade
Email sales@zeolitemolecularsieve.com or call +86 153 7878 8801 — 08:30–18:00 China time, Monday to Saturday.