Atlas Copco BD360 Adsorption Air Dryer

The Atlas Copco BD360 is a heatless pressure-swing adsorption (PSA) compressed air dryer delivering a pressure dew point (PDP) of -40°C or -70°C, complying with ISO 8573-1 Class 2 or Class 1 for moisture content. Unlike refrigerant dryers which achieve +3°C PDP, adsorption dryers are required wherever the application demands sub-zero dew points — in outdoor instrument air systems exposed to temperatures below freezing, in compressed air-operated pneumatic lines running through cold process environments, in gas instrumentation systems, and wherever trace moisture would cause corrosion, freeze-up, or measurement error. The BD360 handles flow rates up to 360 Nm³/h across a pressure range of 4 to 13 bar(e).

The BD series operates on the twin-tower heatless regeneration principle: one silica-gel or activated-alumina desiccant tower adsorbs moisture while the other regenerates using a small purge stream of already-dried compressed air, switching on a timed cycle to provide continuous dry air output. The heatless design requires no heater elements — a significant advantage in hazardous area classifications (ATEX zones) common in oil-and-gas instrument air systems, as heater elements are eliminated as ignition sources. Atlas Copco's BD series incorporates an intelligent dew-point controller that extends the drying cycle when inlet air is drier than design, reducing regeneration purge losses and saving compressed air energy.

In Saudi Arabia, the Atlas Copco BD series adsorption dryer is the standard specification for ARAMCO offshore platform instrument air systems, where the combination of salt-laden sea air, high ambient humidity, and sub-zero dew point requirements mandates adsorption rather than refrigerant drying. The BD360 is also specified for ARAMCO's high-humidity coastal onshore facilities in the Ras Tanura and Ju'aymah area, where refrigerant dryers alone cannot meet the -40°C PDP requirement for reliable pneumatic instrument operation. Instrumentation engineers at EPC contractors working on ARAMCO FEED and detailed design projects routinely specify BD series dryers to meet SAES-J-002 Class II instrument air requirements.

Razz Middle East supplies BD360 dryers with full ARAMCO compliance documentation, technical data sheets in SAES-J format, and experienced field engineers who understand the specific instrument air quality requirements of Saudi upstream and downstream oil-and-gas facilities.