DD-P Series (High Pressure Range)
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A desiccant dryer is a specialised device used to remove moisture from compressed air or other gases, ensuring the air is dry and suitable for various industrial applications. It operates by passing the moist air through a desiccant material, which adsorbs the water vapour.
Features
- Available in 4 standard models & higher capacities are available on request
- Best atmospheric dew points achievable (-) 40°C to (-) 60°C and max up to (-) 70°C
- Special graded desiccant DelsorbTM 10 and DelsorbTM 21 for optimum performance and long life
- Electric controls/solid state timers for automatic and reliable operation
- Equipped with a muffler on the purge air outlet to reduce the noise level
Optional Energy Savings Features & Advantages on Request
Optional Features
- Humidity indicator
- Filters and/or total dryer bypass line with valves
- Special Delair filters for removal of water, oil mists, oil vapour and dust particles with electronically operated drain valves
- Explosion-proof controls for offshore application
- Construction according to various codes
Std. Design Parameters
- Working Pressure: 25 to 40 kg/cm2(g)
- Air inlet temperature: 40°C
- Ambient temperature: 40°C
How Does it Works?
Delair Refrigeration Dryers operate at high pressures of up to 40 bar. They are based on the method of cooling the air to near freezing point to remove the moisture and the cold dry air is reheated by incoming air to approximately 10°C below the incoming compressed air temperature at nominal conditions.
The dryer consists of an air drying unit with a centrifugal cum demister pad condensate separator and a refrigeration circuit. The refrigeration circuit consists mainly of a compressor, a condenser, a receiver, a vapour liquid accumulator with liquid refrigerant and an evaporator.
The air drying unit consists of two kinds of heat exchangers: air-to-air heat exchangers and refrigerant-to-air heat exchangers.
Delpet Series Compressed Air Dryers are specially designed for the PET Bottle manufacturing process. Compressed air is used to blow the bottles/containers to the desired shape and size.
| MODEL No. | CAPACITY IN M3/HR. PRESSURE IN KG/CM2(G) |
CONNECTION | DIMENSIONS (IN MM) |
WEIGHT (IN KG) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| 25 | 30 | 35 | 40 | (IN INCHES) | L | W | H~ | ||
| DD-P-55 | 34.7 | 41.33 | 48 | 54.7 | ½” FLANGE | 730 | 850 | 1500 | 200 |
| DD-P-75 | 46.30 | 55.2 | 64.1 | 73 | ½” FLANGE | 730 | 850 | 1700 | 220 |
| DD-P-110 | 69.44 | 82.8 | 96.14 | 109.5 | ½” FLANGE | 760 | 850 | 1700 | 270 |
| DD-P-170 | 104 | 124 | 144 | 164 | ½” FLANGE | 800 | 850 | 1700 | 320 |
Frequently Asked Questions
The DD-P Series is a high pressure desiccant air dryer designed to remove moisture from compressed air, delivering dry, clean, oil-free air for PET bottle blowing and other high-pressure industrial processes. It passes moisture-laden compressed air through a desiccant bed that adsorbs water vapour, providing consistently low-moisture output. The series covers 54 to 170 m³/hr (30 to 100 cfm) at working pressures of 25 to 45 bar.
The dryer uses adsorption drying, in which water vapour is captured by a desiccant bed rather than condensed out. It is supplied with specially graded desiccant — Delsorb™ 10 and Delsorb™ 21 — selected for consistent performance and long service life. Pressure dew points from (−) 20 °C down to (−) 50 °C are achievable, depending on the application.
The series is available in four standard models covering 54 to 170 m³/hr (30 to 100 cfm), with higher capacities available on request. Electronic controls and solid-state timers handle automatic operation, and a muffler on the purge air outlet reduces noise levels. Optional features include a humidity indicator, filters and a total dryer bypass line with valves, explosion-proof controls for offshore applications, and construction to various codes.
Delair’s DD-P Series is built specifically for the 25 to 45 bar pressure range, with four standard models and higher capacities available on request. Units can be configured with filtration, bypass arrangements, humidity indication or explosion-proof controls to suit the installation. Delair also supports installed equipment through DelCare, its trained Airgineers® service network, for routine maintenance and technical support.
PET bottle blowing uses high-pressure compressed air, typically 25 to 45 bar, to form the bottle — and any moisture or oil carryover can cause internal bubbles, pockmarks, or weak bottles. The DD-P Series delivers dry, clean, oil-free compressed air at these elevated pressures, helping produce crystal-clear, high-strength PET bottles and keeping the PET resin contamination-free.
