Description

Polybed 812 is a high-performance molecular sieve adsorbent widely recognized for its exceptional moisture removal capabilities. Its critical function is to ensure the purity and stability of sensitive systems by controlling water content to ultra-low levels. This product is essential for industries requiring stringent moisture control, such as refrigerant drying, natural gas processing, and the protection of air-sensitive chemicals and electronic components.

Application

• Refrigerant and Compressed Air Drying: Used in desiccant dryers to remove moisture from refrigerants (R-134a, R-410A, etc.) and compressed air systems, preventing ice formation and corrosion.
• Natural Gas and Hydrocarbon Dehydration: Effectively dries natural gas streams and liquid hydrocarbons (LPG, NGL) to meet pipeline specifications and prevent hydrate formation.
• Insulating Glass (IGU) and Window Manufacturing: Maintains clarity and prevents fogging in double- and triple-pane insulating glass units by adsorbing residual moisture and organic vapors from the sealed air space.
• Polymer and Chemical Production: Protects moisture-sensitive polymerization processes and acts as a guard bed to dry feedstocks and solvents in chemical synthesis.
• Electronic Component Protection: Packaged with sensitive electronic devices and components within shipping containers to prevent corrosion and malfunction due to atmospheric humidity.
• Automotive Air Conditioning Systems: Integrated into receiver-drier/accumulator units to adsorb moisture and acids, extending the life of the A/C system.
• Instrument Air and Breathing Air Systems: Produces ultra-dry air for pneumatic instruments and breathing air applications to ensure reliable operation and safety.
• Packaging: Used in desiccant packets and canisters for pharmaceuticals, food, and military equipment to control humidity and extend shelf life.

Basic Information

Product Name	Polybed 812
CAS No.	82905-58-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Molecular Sieve 812, Zeolite 812, 3A Molecular Sieve (Typical), Potassium Aluminosilicate, KA Zeolite, Desiccant 812, Adsorbent 812, Polybed® 812 (Trade Name)
EINECS	Contact for details

Quality Control

Our Polybed 812 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Key parameters such as adsorption capacity, crush strength, and bead size distribution are rigorously tested. Certificates of Analysis (COA) detailing these specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in its original, unopened packaging until ready for use to prevent premature adsorption of atmospheric moisture, which reduces its effective capacity.

Specification

Item	Specification
Form	Spherical Beads
Bead Size	1.6-2.5 mm (Typical)
Bulk Density	≥ 0.68 g/ml
Static H2O Adsorption Capacity	≥ 20.0 wt%
Crush Strength	≥ 30 N/bead
Attrition Loss	≤ 0.2 wt%
Package Moisture Content	≤ 1.5 wt%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.