Superior DF35A / Alco A3F-D Filter Core

The Superior DF35A / Alco A3F-D Filter Core is a replaceable filter drier core engineered for both suction line clean-up and permanent installation in high-capacity refrigeration and AC systems. This solid core utilizes a specialized blend of molecular sieve and activated alumina to deliver superior moisture and acid removal, protecting critical components from localized debris and chemical degradation. With a nominal 3" diameter and a 115 sq. in. filter area, this dual-purpose filter core ensures a low pressure drop and high contaminant retention, even in systems subject to heavy particulate loading. Designed for use in shell-type drier housings like the Superior 3CFA or Alco BTAS series, it provides a reliable line of defense against compressor failure by isolating harmful solids before they reach the crankcase. This HVAC filter core replacement is industry-standard for technicians performing system decontamination after a burnout or during routine maintenance on commercial refrigeration filter drier assemblies.

• Optimized Contaminant Control: High-efficiency removal of moisture, organic acids, and solid particles to extend compressor life.
• Dual-Action Desiccant: Blended molecular sieve and activated alumina design for comprehensive refrigerant filtration.
• Versatile Application: Validated for both temporary system clean-ups and long-term permanent use.
• Direct Cross-Compatibility: Precise replacement for Alco A3F-D and Superior DF35A cores in compatible suction line shells.
• High Surface Area: 115 square inches of filtration surface optimizes flow and minimizes pressure drop across the cartridge.

Is the DF35A compatible with Alco housings?
Yes, the Superior DF35A is a direct functional equivalent to the Alco A3F-D filter core and fits standard BTAS-3 and 3CFA shell series.

Can I use this for liquid line applications?
While primarily used for suction line clean-up, this refrigeration filter core is rated for system-wide moisture and acid removal in compatible replaceable core shells.

When should this filter core be replaced?
Replacement is required whenever the pressure drop across the core exceeds the manufacturer's recommended limit or after a successful system clean-up following a burnout.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.