Import 4a Bead — Buy in Bulk from Supplier in China

The 4A bead supplied by Shanghai Welcome Molecular Sieve Ltd. is an alkali alumino-silicate in spherical form, designed for industrial adsorption and separation processes. Its pore diameter measures exactly 4 Ångströms, targeting molecules such as water, ammonia, and methanol while excluding larger hydrocarbons. The particle size ranges from 1.58 to 4.75 mm, providing consistent flow dynamics in fixed-bed systems. Bulk density is confirmed at 640 kg per cubic metre, optimising bed volume without excessive weight in large-scale installations.

This type A crystal structure in sodium form offers high selectivity for polar molecules, making it a standard choice for drying gases and liquids in petrochemical and pharmaceutical production. Typical applications include the removal of moisture from natural gas streams, where its uniform pore structure prevents co-adsorption of larger hydrocarbons. The beads are supplied in industrial-grade quality, suitable for catalyst supports and as a desiccant in packaging. Industry standard crushing strength for 4A beads is above 20 N, ensuring durability under pressure drop in dynamic systems.

Primary buyers include petrochemical plants, environmental engineering firms, and manufacturers of insulated glass units, where moisture control is critical for product longevity. The product is packed in moisture-proof bags to preserve adsorption capacity during transit. Standard pallet configurations allow for efficient container loading, with lead times and incoterms such as FOB Shanghai to be confirmed directly with Shanghai Welcome Molecular Sieve Ltd.

Shanghai Welcome Molecular Sieve Ltd. operates from No.546, Zhenchen Road in the Putuo District of Shanghai, China. The company specialises in the production and supply of molecular sieve products for industrial adsorption applications, with a focus on the petrochemical, pharmaceutical, and environmental sectors. Its profile indicates an imported supplier tier with a harbor trust classification, reflecting its role in international trade networks.

The supplier’s current listing provides no verified response rate or average response time, so direct contact is required to confirm trade terms and technical queries. No certifications, production capacity, or quality control details are stated in the available data. Buyers should independently verify compliance with industry standards such as ISO or SGS, as these are not explicitly confirmed by the supplier’s profile.