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PH 55–550 S

Energy-efficient heatless adsorption dryers designed to deliver clean, dry compressed air with -20°C or -40°C pressure dew points, helping protect equipment, products and processes from moisture-related problems.
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Introduction

Atcorp offers PH 55–550 S heatless adsorption dryers for industrial compressed-air systems requiring reliable low-dew-point air. The range combines a robust extruded aluminium design, spring-loaded desiccant, counter-current regeneration and optimized purge control to provide consistent drying performance while helping control operating and maintenance costs.

Key Benefits

Flexible Installation
Two Dew-Point Options
Counter-Current Regeneration
Standard Filtration
Wide Capacity Range
Reliable Valve Design

Why Choose pH 55–550 S Adsorption Dryers?

Moisture in compressed air can cause corrosion, freezing, pneumatic equipment problems and process-quality issues. Heatless adsorption dryers remove moisture by passing compressed air through a desiccant that captures water vapour.

 

The PH 55–550 S regenerates the saturated desiccant using a portion of dried and expanded purge air. This cyclic process enables continuous compressed-air drying while maintaining pressure dew points of -20°C or -40°C, depending on the selected configuration.

Model

Version PDP -40°C

Nominal volume flow at dryer inlet (m3/h)

PH 55 S

90

PH 75 S

126

PH 95 S

162

PH 120 S

198

PH 140 S

234

PH 190 S

324

PH 230 S

396

PH 275 S

468

PH 350 S

594

PH 420 S

702

PH 550 S

936

The PH 55–550 S uses a two-vessel heatless adsorption process to continuously remove moisture from compressed air.

 

Step 1 – Moist Compressed Air Entry
Moist compressed air enters the active adsorption vessel.

 

Step 2 – Filtration
Pre-filtration helps protect the desiccant from contaminants entering with the compressed air.

 

Step 3 – Adsorption
The compressed air passes through the desiccant, which captures water vapour.

 

Step 4 – Dry Air Delivery
The dried compressed air exits the active vessel and enters the plant air network.

 

Step 5 – Desiccant Saturation
The desiccant gradually accumulates moisture during the adsorption cycle.

 

Step 6 – Counter-Current Regeneration
A portion of dried compressed air is expanded and directed through the saturated vessel in the opposite direction to the drying airflow.

 

Step 7 – Vessel Switching
The valves switch the functions of the two vessels so that the regenerated vessel begins drying while the other enters regeneration.

 

Step 8 – Continuous Drying
The alternating cycle provides continuous production of dry compressed air.

-20°C and -40°C Dew-Point Options

The PH 55–550 S is available in two pressure-dew-point configurations, allowing customers to select the appropriate drying level for their application. 

 

Advanced Energy Management

Compressor synchronization and purge-nozzle optimization help reduce unnecessary energy and purge-air consumption during dryer operation. 

 

Optimized Purge Nozzles

Two purge nozzles are incorporated to optimize purge-air expansion during regeneration, helping improve overall operating efficiency. 

 

Reliable Valve Switching

The unique manifold uses pilot-air-controlled 3/2-way valves designed for fast and reliable switching between drying and regeneration cycles. 

 

Spring-Loaded Desiccant

The desiccant is spring-loaded to minimize movement and reduce the risk of crushing during operation, supporting reliable long-term performance. 

 

Counter-Current Regeneration

Regenerating against the drying airflow direction supports efficient moisture removal and helps maintain consistent dry-air performance. 

 

Easy Desiccant Servicing

Desiccant bags can be accessed from the top, simplifying routine servicing and replacement. 

 

Real-Time Monitoring

The advanced controller provides visibility into machine status, pressure, valve operation and maintenance requirements. 

 

Standard Pre- and After-Filters

Pre- and after-filters are supplied as standard, helping protect the dryer and maintain suitable compressed-air quality

Drying Technology

  • Heatless adsorption
  • Two-vessel operation
  • -20°C pressure dew point
  • -40°C pressure dew point
  • Counter-current regeneration
  • High-quality desiccant

 

Energy Management

  • Compressor synchronization
  • Two optimized purge nozzles
  • Optional PDP control
  • Efficient purge-air management

 

Mechanical Construction

  • Extruded aluminium profile
  • Spring-loaded desiccant
  • Robust valve manifold
  • Pilot-air-controlled 3/2-way valves
  • Designed for transportability and mounting

 

Filtration

  • Standard pre-filter
  • Standard after-filter

 

Control & Monitoring

  • Advanced controller
  • Machine-status monitoring
  • Pressure monitoring
  • Valve-status indication
  • Maintenance indication
  • Optional PDP monitoring
  • Remote alarms/warnings through available voltage-free contacts

 

Installation Options

  • Standard industrial installation
  • Optional wall-mounting kit for PH 55–140 S
  • Compact extruded-profile construction

 

The current product information lists wall mounting and PDP control as the principal options.

Industrial Applications

PH 55–550 S adsorption dryers are suitable for medium- and high-capacity compressed-air systems where reliable moisture removal and low pressure dew points are required.
Automotive Manufacturing
Helps provide dry compressed air for pneumatic automation, production equipment and assembly systems.
Machine Tools
Suitable for CNC machines, pneumatic tooling and precision production equipment requiring dry compressed air.
Pharmaceutical Manufacturing
Can support selected manufacturing and utility applications where controlled compressed-air moisture is required.
Textile Manufacturing
Supports pneumatic machinery and automated production equipment requiring dependable dry air.
Food & Beverage
Suitable for selected compressed-air applications where the required moisture specification is compatible with the process.

Frequently Asked Questions

Find answers about PH 55–550 S heatless adsorption dryers, pressure dew point, capacity, regeneration, controls, maintenance and installation.
The PH 55–550 S is a range of extruded-profile heatless adsorption dryers designed to provide clean, dry compressed air with pressure dew points of -20°C or -40°C.
The range is available in -20°C / -4°F and -40°C / -40°F pressure-dew-point versions.
The PH 55–550 S range covers nominal inlet flows from 90 to 936 m³/h
The PH 55–550 S focuses on cost-efficient heatless adsorption with -20°C and -40°C PDP options, while the PH 55–420 HE is designed for -70°C ultra-dry air and incorporates a different high-efficiency configuration. The appropriate choice depends primarily on the required dew point and operating requirements.
Selection should consider required pressure dew point, compressed-air flow, operating pressure, inlet temperature, ambient temperature, installation space and future capacity requirements.
Yes. Atcorp can help Indian industrial customers assess their compressed-air drying requirements and select the appropriate PH 55–550 S model based on airflow, pressure dew point, operating conditions and installation requirements.

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