Hankison FLXA5.5-A-FP 550 SCFM Cycling Refrigerated Air Dryer with Filtration Package, 460V/3Ph - PN 7490751

Energy-efficient cycling refrigerated air dryer with phase change material technology, advanced controls, and an included prefilter and afterfilter package.

The Hankison FLXA5.5-A-FP Cycling Refrigerated Air Dryer is designed to remove moisture from industrial compressed air systems while reducing energy consumption during periods of lower air demand. Rated for 550 SCFM, this dryer helps protect pneumatic tools, controls, machinery, piping, and production equipment from corrosion and moisture-related damage.

The FLXA Series uses an advanced phase change material, or PCM, thermal reservoir to store cooling energy. Once the PCM has been sufficiently cooled, the refrigeration compressor and condenser fan cycle off while the stored cooling capacity continues drying the compressed air. The refrigeration system automatically restarts when additional cooling is required, allowing power consumption to closely follow actual compressed air demand.

This FLXA5.5-A-FP configuration includes the Hankison filtration package, consisting of an HF Grade 5 prefilter and an HF Grade 7 afterfilter for additional protection against oil aerosols and particulate contamination.

Key Features and Benefits

Energy-Saving Cycling Operation

The refrigeration compressor automatically cycles on and off based on compressed air demand. This reduces unnecessary compressor runtime compared with conventional non-cycling refrigerated dryers that operate continuously.

Phase Change Material Thermal Storage

The integrated PCM thermal reservoir stores and releases cooling energy while maintaining a stable pressure dew point. The PCM changes between liquid and solid states as compressed air demand changes.

550 SCFM Rated Capacity

Designed for larger industrial compressed air systems requiring reliable moisture removal at airflow rates up to 550 SCFM under standard rated conditions.

Included Filtration Package

The included prefilter and afterfilter help remove oil aerosols and solid particulate before and after the dryer, providing additional protection for the heat exchanger and downstream equipment.

Stable Pressure Dew Point

Delivers a nominal pressure dew point below 45°F for ISO 8573-1 Class 4-5 pressure dew point performance.

High-Pressure Capability

Rated for a maximum operating pressure of 232 PSIG, making it suitable for a wide range of industrial compressed air applications.

Advanced Monitoring and Controls

The backlit LCD controller provides operating information, energy-saving data, alarms, and communication capabilities for convenient system monitoring.

R-513A Refrigerant

Uses low-global-warming-potential R-513A refrigerant for dependable and environmentally responsible refrigeration performance.

Included Filtration Package

Hankison HF Grade 5 Prefilter

The HF Grade 5 prefilter removes fine particulate and oil aerosols before the compressed air enters the dryer.

• Removes solid particulate down to 0.01 micron
• Remaining oil content of 0.008 ppm/w
• ISO 8573-1 Solids Class 1
• ISO 8573-1 Remaining Oil Class 1
• Helps protect the dryer’s heat exchanger from contamination
• Supports reliable dryer operation and reduced maintenance

Hankison HF Grade 7 Afterfilter

The HF Grade 7 afterfilter provides additional particulate and oil removal after the compressed air passes through the dryer.

• Removes solid particulate down to 1 micron
• Remaining oil content of 1.0 ppm/w
• ISO 8573-1 Solids Class 2
• ISO 8573-1 Remaining Oil Class 4
• Helps protect downstream pneumatic equipment
• Provides cleaner compressed air for machinery, tools, and controls

Standard Features

• 550 SCFM rated airflow
• Energy-saving cycling refrigeration system
• Phase change material thermal reservoir
• Stainless steel brazed-plate 4-in-1 heat exchanger
• Integrated air-to-air heat exchanger
• Stainless steel mesh moisture separator
• Timed solenoid condensate drain
• High-efficiency up-flow air-cooled condenser
• Semi-hermetic refrigeration compressor
• Backlit LCD controller
• Dew point status monitoring
• Compressed air inlet temperature display
• Dryer operating-hour display
• Refrigeration compressor operating-hour display
• Estimated energy-savings display
• Active fault messages
• Alarm history
• USB connection for data logging
• Modbus RTU communication through RS485
• HF Grade 5 prefilter
• HF Grade 7 afterfilter
• R-513A refrigerant
• UL 60335-1 and UL 60335-2-40 listed design

Technical Specifications

How the Hankison FLXA5.5 Works

Warm, moisture-laden compressed air enters the dryer and passes through the air-to-air heat exchanger. The incoming air is partially cooled by the cold, dry compressed air leaving the dryer.

The compressed air then enters the chiller section, where it is cooled to its pressure dew point. Water and oil vapors condense into liquid and are removed by the integrated moisture separator and automatic condensate drain.

The cold, dry compressed air returns through the air-to-air heat exchanger, where it is reheated before leaving the dryer. Reheating the compressed air helps prevent condensation from forming on downstream piping.

The refrigeration circuit cools and solidifies the phase change material. Once the PCM has stored sufficient cooling energy, the refrigeration compressor and condenser fan cycle off. The PCM continues cooling the compressed air without consuming refrigeration compressor power. When the PCM has absorbed enough heat and returns to a liquid state, the refrigeration system automatically restarts.

Recommended Applications

The Hankison FLXA5.5-A-FP is suitable for compressed air systems serving:

• Manufacturing facilities
• CNC machines and machining centers
• Metal fabrication operations
• Automotive repair and body shops
• Packaging equipment
• Pneumatic production machinery
• Woodworking and cabinet manufacturing
• Process equipment
• Plant air systems
• Industrial tools and controls
• Assembly operations
• General industrial compressed air applications

Rated Operating Conditions

The published 550 SCFM capacity is based on ISO 7183 Option A2 rating conditions:

• 100°F compressed air inlet temperature
• 100°F ambient temperature
• 100 PSIG operating pressure

Actual dryer capacity will vary based on compressed air inlet temperature, ambient temperature, and operating pressure. Capacity correction factors should be applied when operating conditions differ from the published rating conditions.

Installation Considerations

The dryer should be installed in a clean, adequately ventilated location with sufficient clearance for airflow, maintenance, and service access.

Verify the following before installation:

• Available electrical power is 460V, three-phase, 60 Hz
• Compressed air flow does not exceed the corrected dryer capacity
• Inlet air temperature remains within the dryer’s operating limits
• Ambient temperature remains within the approved range
• System pressure does not exceed 232 PSIG
• Condensate is routed to an appropriate oil-water separator or approved disposal system
• Adequate clearance is provided around the air-cooled condenser
• The dryer is properly sized for actual operating conditions

Professional installation by a qualified compressed air equipment technician and licensed electrician is recommended.

Maintenance

Routine maintenance helps maintain dryer performance, air quality, and energy efficiency.

Recommended maintenance includes:

• Inspecting the condensate drain for proper operation
• Replacing prefilter and afterfilter elements at recommended intervals
• Cleaning the air-cooled condenser
• Checking airflow around the dryer
• Monitoring the controller for alarms or fault messages
• Inspecting compressed air connections for leaks
• Purchasing the required annual maintenance kit to maintain extended warranty eligibility

Warranty

2-Year Standard Parts and Labor Warranty

Because the FLXA5.5-A-FP includes the Hankison filtration package, it is eligible for an additional three years of parts-and-labor protection for a total of up to 5 years of warranty coverage.

Annual purchase of the required maintenance kit is necessary to maintain extended warranty eligibility. Terms and conditions apply.

Frequently Asked Questions

Does the Hankison FLXA5.5-A-FP include filters?

Yes. The FLXA5.5-A-FP includes a Hankison HF Grade 5 prefilter and an HF Grade 7 afterfilter.

What is the capacity of the Hankison FLXA5.5-A-FP?

The dryer is rated for 550 SCFM under ISO 7183 Option A2 operating conditions. Capacity correction factors should be used when inlet temperature, ambient temperature, or operating pressure differs from the rated conditions.

What electrical power does this dryer require?

The FLXA5.5-A-FP requires 460-volt, three-phase, 60 Hz electrical power.

What size are the air connections?

The dryer has 2-inch NPT male inlet and outlet connections.

What is the maximum operating pressure?

The maximum operating pressure is 232 PSIG.

What pressure dew point does the dryer provide?

The FLXA5.5-A-FP provides a nominal pressure dew point below 45°F for ISO 8573-1 Class 4-5 pressure dew point performance.

How does PCM cycling technology save energy?

The phase change material stores cooling energy. Once the PCM has been sufficiently cooled, the refrigeration compressor and condenser fan cycle off while the stored cooling energy continues drying the compressed air. The refrigeration system restarts only when additional cooling is required.