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PH 90-690 HE

High-capacity heatless adsorption dryers with structured desiccant technology, engineered to provide stable low pressure dew points, efficient airflow and dependable moisture removal for demanding industrial compressed-air systems.
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Introduction

Atcorp offers PH 90–690 HE heatless adsorption dryers for high-flow compressed-air systems requiring reliable low-dew-point performance. The range incorporates structured Solides desiccant technology to promote even airflow, reduce pressure drop and extend desiccant life, while pneumatic valves and PureLogic Touch controls support dependable operation and easier maintenance.

Key Benefits

Very Dry Compressed Air
40% Longer Desiccant Life
Stable Dew Point
Structured Desiccant Technology
Low Pressure Drop
Robust Pneumatic Valves

Why Choose pH 90–690 He Adsorption Dryers?

Many industrial processes require compressed air that is considerably drier than conventional refrigeration dryers can provide. Heatless adsorption dryers remove water vapour by passing compressed air through a moisture-adsorbing desiccant, making them suitable for applications where condensation, freezing or moisture-related equipment problems must be minimized.

 

The PH 90–690 HE range takes this technology further with structured Solides desiccant. Its uniform structure promotes efficient and even airflow, helping reduce pressure drop, stabilize the pressure dew point and extend desiccant service life.

Model

Version PDP -40°C

Nominal volume flow at dryer inlet (m3/h)

PH 90 HE

144

PH 110 HE

198

PH 135 HE

234

PH 180 HE

306

PH 220 HE

378

PH 265 HE

450

PH 355 HE

612

PH 400 HE

684

PH 535 HE

900

PH 690 HE

1206

A heatless adsorption dryer uses a desiccant to capture moisture from compressed air and alternates between drying and regeneration cycles.

 

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

 

Step 2 – Filtration
Upstream filtration helps protect the desiccant from oil, water and particulate contamination.

 

Step 3 – Adsorption
Compressed air flows through the structured desiccant, which captures water vapour.

 

Step 4 – Dry Air Delivery
The treated air exits the active vessel with a low pressure dew point.

 

Step 5 – Desiccant Saturation
The active desiccant gradually accumulates moisture.

 

Step 6 – Regeneration
A portion of dry compressed air is used to regenerate the saturated desiccant.

 

Step 7 – Vessel Switching
The drying and regeneration vessels alternate automatically.

 

Step 8 – Continuous Operation
One vessel continues drying while the other is regenerated, providing uninterrupted dry compressed air.

 

The structured Solides desiccant is designed to distribute airflow evenly, improving contact with the drying material and reducing pressure drop.

Structured Solides Desiccant

Unlike conventional loose desiccant beads, the structured desiccant has a compact, uniform form that promotes even airflow and efficient regeneration.

40% Longer Desiccant Lifetime

The manufacturer specifies a 40% longer desiccant lifetime, helping extend service intervals and reduce maintenance frequency.

 

Lower Pressure Drop

Even airflow through the structured desiccant reduces flow resistance, helping lower the energy associated with compressed-air pressure losses.

 

No Desiccant Dust

The solid structured design avoids the dust formation associated with traditional loose desiccant, helping reduce contamination and dryer-failure risks.

 

Stable Low Dew Point

The PH 90–690 HE provides -20°C or -40°C pressure dew point options for applications requiring significantly dry compressed air.

 

Robust Pneumatic Valves

Pneumatic valves are designed to provide dependable operation in demanding industrial environments.

 

Optimized Purge Nozzle

Purge-nozzle optimization helps control regeneration airflow and supports efficient heatless adsorption operation.

 

PureLogic Touch Control

The PureLogic Touch controller provides real-time monitoring and control, while connectivity options can support integration with DCS, SCADA and PLC systems.

 

Flexible Installation

The dryers can be installed vertically or horizontally, with a wall-mounting kit available for selected Simplex models.

Standard Features

  • Cycling refrigeration technology
  • Energy-saving control algorithm
  • Air-to-air heat exchanger
  • Air-to-refrigerant heat exchanger
  • Zero-loss condensate drain
  • Stable 3°C pressure dew point
  • Low pressure drop
  • Top-mounted pipe connections
  • Voltage-free remote alarm contact
  • Automatic restart after voltage failure
  • Easy access to key components
  • Long service intervals

 

Model / Configuration Options

  • 16-bar configuration
  • 20-bar configuration for AC 15–100
  • Air-cooled refrigeration configuration
  • R513A refrigerant for AC 15–100
  • R410A refrigerant for AC 125–200

Industrial Applications

PH 90–690 HE adsorption dryers are suitable for medium- and high-flow compressed-air systems where low pressure dew points and reliable moisture protection are important.
Pharmaceutical Manufacturing
Provides very dry compressed air for selected pharmaceutical production and utility applications where moisture control is critical.
Electronics & Semiconductor Manufacturing
Helps reduce moisture-related risks in sensitive manufacturing environments and pneumatic systems.
Instrumentation & Control Air
Supports pneumatic instrumentation and control equipment requiring reliable low-dew-point air.
Chemical & Process Industries
Provides dry compressed air for selected process controls, instrumentation and production equipment.
Precision Manufacturing
Provides dry compressed air for applications where condensation can affect equipment performance or process reliability.

Frequently Asked Questions

Find answers about PH 90–690 HE heatless adsorption dryers, structured desiccant technology, capacity, dew point, maintenance, controls and installation.
The PH 90–690 HE is a range of extruded-profile heatless adsorption dryers designed for medium- and high-flow compressed-air systems requiring low pressure dew points. The range covers nominal flows from 144 to 1,206 m³/h.
The range is available with -20°C and -40°C pressure dew point configurations.
The largest model, PH 690 HE, provides a nominal inlet flow of 1,206 m³/h in the -40°C PDP configuration.
Yes. The range can be considered for Indian industrial facilities requiring low-dew-point compressed air, provided the selected model is correctly sized for airflow, pressure, inlet temperature and ambient conditions.
Selection should consider required pressure dew point, actual compressed-air flow, operating pressure, inlet temperature, ambient conditions, installation orientation and future capacity requirements
Yes. Atcorp can help Indian industrial customers evaluate their compressed-air drying requirements and identify the appropriate PH 90–690 HE configuration based on airflow, pressure dew point, operating conditions and installation requirements.

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