800 CFM Refrigerated Air Dryers

800 CFM Rated Capacity, 460/3/60 power requirement

 

Our non-cycling range is focused on reliable, constant dew point performance in all flow conditions. With its excellent heat transfer coefficients and extremely low pressure drop, these dryers will outperform the competition in protecting your compressed air system, machinery and tools; and will improve your manufacturing processes.
Through optimization of the critical dryer elements heat exchanger, separator and condensate removal, the Donaldson engineers developed a system that ensures highest performance at full- and partial-load conditions to protect your application at all times.
Donaldson's high-efficiency cycling range is designed to automatically shut ON and OFF depending on the actual load conditions.

Ozone-safe, 100% chlorine free, R-134a refrigerant as standard:
Donaldson uses R-134a refrigerant in all refrigerated compressed air dryers as standard. R-134a has become the industry’s choice as the preferred refrigerant because of its ozone depletion factor of 0.0 and low global warming potential. R-134a is a one blend
refrigerant and, therefore, consistent in performance (no temperature glide) and easy to service (no mixture of different refrigerants). All Donaldson dryers are designed to give our customers the best value available in the industry – reliable performance to CAGI ADF 100 specification while consuming the lowest amount of energy possible.

Donaldson VF Series dryers offer highest efficiencies at varying flow conditions in a lightweight, compact design. No other dryer in the industry can offer the efficiency ratings achieved by the VF Series dryers in variable flow operation. VF Series dryers are built with the patented Variable Flow heat exchanger, which allows for desired dew point performance regardless of flow variations. Typically, other dryers with mechanical moisture separators lose performance as compressed airflow velocity increases or decreases substantially around the nominal design point. The VF Series high efficiency heat exchanger utilizes a three-step process to thoroughly remove condensed moisture from the chilled compressed air. This process provides a separation efficiency in excess of 98% throughout the dryer's entire flow range.

 

• Lightweight & compact
• Pre-cooling and reheating of compressed air for high efficiency and low energy consumption
• Patented Variable Flow high-efficiency aluminum heat exchanger utilizing 3-step process of Impaction, Brownian Motion, and Surface Tension to achieve consistent dew point at varying flow conditions
• Evaporator includes multi-stage separator with removal (cleanable) stainless steel demister
• Environmentally friendly refrigerant R-134a ensures reliable operation in high ambient overload conditions
• Réfrigérant analyzer gauge
• Réfrigérant discharge pressure gauge (VF-150 and up)
• Inlet pressure gauge (VF-400 and up)

Features & Benefits
• High efficiency scroll refrigeration compressor (VF-500 and up)
• Heavy-duty industrial powder coated cabinet with access panel


How the VF Heat Exchanger Works
Hot, saturated compressed air is first precooled by exiting cold air in the air-to-air heat exchanger. The precooled air then enters the evaporator where it is cooled to its final dew point. The mixture of cold air and condensation flows into the three-stage separator/demister where liquids and contaminants are reliably removed and ejected from the system via a programmable timer drain valve. The cold air is then reheated by the incoming hot air before leaving the dryer