Home » Air Compressors » Crownwell Air Compressor » Desiccant Air Dryer

Crownwell Desiccant Air Dryer

Regenerated Air Dryer

General Discription

CWPH - Heatless Regenerated Dryer (120-1800 cfm)
A heatless desiccant dryer is frequently the best selection for drying small quantities of air to a -40°F or-100°F dew point, or for drying intermittent flows. Heatless dryers are also useful for drying in hazardous environments.
Desiccant dryers have the following advantages over heated types:
1) Lower cost than heat reactivated units
2) Require no high voltage power (saves on electrical installation and service expenses)
3) Operates at low temperatures
4) Not a fire or safety hazard

The CWPH units find applications in mines, process industries, off-shore platforms and drilling rigs. The CWPH dryer is best suited to large volume users of very dry air. The CWPH can be customized to best match end user requirements. The CWPH is designed for simple operation and maintenance.

DESICCANT - High strength 1/4" activated alumina.
PREFILTER - A high-efficiency (HC) coalescing filter is factory-mounted on the dryer package or shipped loose for field mounting. The compressed air is pre filtered prior to entering the dryer's drying vessel to collect any contaminants such as dirt, water or oil drop lets from the upstream compressor. The filter has a 0.01 micron and 0.01 ppm rating.
AFTERFILTER - A particulate, (HT) filter is factory-mounted on the dryer package or shipped loose for field mounting. The compressed air is filtered downstream from the drying vessel to collect any dusting that may have occurred as a result of the drying process. The filter has a 1.0 micron rating.
AUTOMATIC DRAIN VALVE - Supplied on the prefilter of every dryer, this is a mechanical float operated drain valve. A no-loss drain or electronic drain can be provided as a shipped-loose option. Larger dryers are equipped with automatic drain valves.
FILTER DIFFERENTIAL PRESSURE INDICATORS - These are included on pre- and afterfilters to monitor the condition of filter elements.
* For maximum energy efficiency it is recommended to change prefilter and afterfilter elements every year or when they indicate restricted flow.
DRYING VESSELS - Of welded steel construction, all CWPH models are GB or ASME code stamped. Removable stainless steel screens are provided in the inlet and outlet nozzles of each desiccant tower to prevent carry-over of desiccant. Accessible fill and drain ports.
TOWER PRESSURE GAUGES - 2-1/2" or 3-1/2" dial, 0-300 psig, brass bourdon tube mounted on each vessel for ease of visibility.
PRESSURE RELIEF VALVE - A fire-coded safety valve is located on each desiccant chamber. It is set for 165 psig.

SWITCHING VALVES -
High-performance non lubricated diaphragm valve
Normally open inlet valve
Normally closed exhaust valves
Integrated pilot air circuits.

OUTLET CHECK VALVES -
All models use a high performance, steel bodied check valve with aluminum internals and a silicon seat.

CONTROLS - A NEMA 4 Microprocessor Controller with integrated keypad interface is standard. Includes a dryer schematic with visual indications of: dryer on, dryer alarm, left/right tower drying and left/right tower regeneration.

ELECTRICAL ENCLOSURE - NEMA 4 is the standard enclosure. Constructed in accordance with UL/ULC 508A.
ASSEMBLY - Fully assembled on self-supporting fabricated steel frame.
MANUAL PURGE ADJUSTMENT - A purge adjustment valve is included with a mounted purge pressure gauge.
MUFFLERS - One for each purge air outlet.

PIPING AND FITTINGS -
1" to 6" Schedule 40, SA53 Gr. B ERW carbon steel pipe.
1" to 2" uses threaded 150# black malleable iron fittings.
3" to 6" flanged and welded fittings. ANSI B16.5 Class 150 raised face flanges.

Model Flow Capacity M3/min Conn. Dimensions LxWxH mm Weight Kg
CW-1PH 1.2 ZG 1" 505x360x1188 180
CW-2PH 2.4 ZG 1" 505x360x1646 240
CW-3PH 3.8 DN40 555x360x1553 350
CW-6PH 6.5 DN40 773x400x1018 510
CW-8PH 8.5 DN50 860x500x1950 550
CW-10PH 10.7 DN50 962x700x1880 780
CW-13PH 13.5 DN50 962x700x2090 780
CW-15PH 16 DN80 1175x800x1908 900
CW-20PH 23 DN80 1175x600x2208 1280
CW-25PH 27 DN80 1275x650x2020 1520
CW-30PH 33 DN80 1415x700x2110 1760
CW-40PH 45 DN100 1465x600x2393 2200
CW-50PH 55 DN125 1815x800x2473 2600
CW-60PH 65 DN125 1815x800x2673 3100
CW-80PH 85 DN125 2013x900x2570 4100
CW-100PH 100 DN150 2300x1500x2933 5200
CW-150PH 150 DN200 2700x1800x3429 6000
CW-200PH 200 DN250 2900x2000x3529 6800
Heated Regenerated Air Dryer

The vessels have been designed specifically for this service. Vessel diameters have been chosen to allow a minimum of five (5) seconds contact time, which is essential for complete moisture adsorption and consistent dew-points. Air velocity through the dryer has been conservatively designed at less than fifty-five feet per minute, minimizing desiccant fluidization and dusting, and resulting in high dryer reliability.

Externally heated air dryer adds a heater based on CWPE dryer to heat the purge air. It not only benefits the regeneration effect but also decreases regeneration purge loss. 8 hours standard cycle, dryer cycles are controlled by a timer.

We can also supply the option functions as below:
l Digital Dew Point Monitor
l PLC Controller With Connection Port
l Without Failure To Shift Alarm -DF1, -RS485, -MODBUS
l Including Failure To Shift Alarm -DF1, -RS485, -MODBUS
l Dew Point Demand Control

Dew Point Demand Control:
The Dew Point is energy conservation method that can extend the drying cycle without extra purging. During periods of lower moisture loads, the Dew Point Demand system offers, in one compact package, the utmost in flexibility and accuracy sensing the actual dew point at the outlet of the dryer. At the end of the drying cycle, it extends the drying cycle until the preset adjustable dew point set-point is reached. During this extended drying cycle the purge valves are closed and the opposite tower is pressurized and prepared for the drying cycle. The dew point demand option consists of the following: Digital Dew Point Display, Adjustable Set Points, Demand Cycle Light, High Humidity Alarm Light With Dry Contact, 4~20mA Output for Remote Annunciation.

DESICCANT - High strength 1/4" activated alumina.
PREFILTER - A high-efficiency (HC) coalescing filter is factory-mounted on the dryer package. The compressed air is pre filtered prior to entering the dryer's drying vessel to collect any contaminants such as dirt, water or oil drop lets from the upstream compressor. The filter has a 0.01 micron and 0.01 ppm rating.
AFTERFILTER - A particulate, (HT) filter is factory-mounted on the dryer package. The compressed air is filtered downstream from the drying vessel to collect any dusting that may have occurred as a result of the drying process. The filter has a 1.0 micron rating.
FILTER DIFFERENTIAL PRESSURE INDICATORS - These are included on pre- and afterfilters to monitor the condition of filter elements.
* For maximum energy efficiency it is recommended to change prefilter and afterfilter elements every year or when they indicate restricted flow.
DRYING VESSELS - Of welded steel construction, all HL models are GB or ASME code stamped. Removable stainless steel screens are provided in the inlet and outlet nozzles of each desiccant tower to prevent carry-over of desiccant. Accessible fill and drain ports.
TOWER PRESSURE GAUGES - 2-1/2" or 3-1/2" dial, 0-300 psig, brass burdon tube mounted on each vessel for ease of visibility.
PRESSURE RELIEF VALVE - A fire-coded safety valve is located on each desiccant chamber. It is set for 165 psig.
SWITCHING VALVES -
High-performance non lubricated diaphragm valve
Normally open inlet valve
Normally closed exhaust valves
Integrated pilot air circuits.
OUTLET CHECK VALVES -
All models use a high performance, steel bodied check valve with aluminum internals and a silicon seat.
CONTROLS - A NEMA 4 Microprocessor Controller with integrated keypad interface is standard. Includes a dryer schematic with visual indications of: dryer on, dryer alarm, left/right tower drying and left/right tower regeneration.
ELECTRICAL ENCLOSURE - NEMA 4 is the standard enclosure. Constructed in accordance with UL/ULC 508A.
ASSEMBLY - Fully assembled on self-supporting fabricated steel frame.
MANUAL PURGE ADJUSTMENT - A purge adjustment valve is included with a mounted purge pressure gauge.
MUFFLERS - One for each purge air outlet.
PIPING AND FITTINGS -
1" to 6" Schedule 40, SA53 Gr. B ERW carbon steel pipe.
1" to 2" uses threaded 150# black malleable iron fittings.
3" to 6" flanged and welded fittings. ANSI B16.5 Class 150 raised face flanges.

Model Flow Capacity M3/min Conn. Dimensions LxWxH mm Weight Kg
CW-1PE 1.2 ZG 1" 405x360x1188 190
CW-2PE 2.4 ZG 1" 405x360x1646 300
CW-3PE 3.8 DN40 405x360x1553 390
CW-6PE 6.5 DN40 773x600x1018 550
CW-8PE 8.5 DN50 862x700x1950 620
CW-10PE 10.7 DN50 962x700x1880 910
CW-13PE 13 DN50 962x700x2090 1060
CW-15PE 16 DN80 1175x800x1908 1060
CW-20PE 23 DN80 1175x600x2208 1420
CW-25PE 27 DN80 1175x700x2020 1630
CW-30PE 33 DN80 1175x700x2110 2100
CW-40PE 45 DN100 1465x700x2393 2600
CW-50PE 55 DN125 1815x800x2473 3100
CW-60PE 65 DN125 1815x800x2673 3700
CW-80PE 85 DN125 2013x900x2870 4600
CW-100PE 100 DN150 2300x1500x2933 5200
CW-150PE 150 DN200 2700x1800x3429 7800
CW-200PE 200 DN250 1900x2000x3529 8200
Inquiry Form