Refrigeration dryers

Compressed air drying to +3 °C, economical and low-maintenance

Refrigeration dryers are the most common way of drying compressed air. They cool the air to around +3 °C so that the water vapour condenses and is drained off. The air is then reheated so that no more condensate forms in the network.

CompAir builds its refrigeration dryers in its own factory in Fogliano, Italy: non-cycling, cycling, variable speed, for Sub-Zero dew points and for high pressure up to 45 bar.

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Pressure dew point

+3 °C, Sub-Zero −20 °C

Air quality

ISO 8573-1 class 4 or 3

Designs

5 product lines

Why a refrigeration dryer?

Moist compressed air makes pipes rust, valves fail and products spoil. Compression further increases the concentration of water and dirt. A refrigeration dryer removes most of the water and uses much less energy to do so than a desiccant dryer.

For workshops, manufacturing, automotive, chemicals and light industry, it is usually the most economical solution.

Heat exchanger with low pressure drop
Energy-saving mode at low load
Anti-freeze mode to prevent icing
Alarm display with alarm history
Zero-loss condensate drainage
Compact, easy to install and maintain

The product lines

CD series – non-cycling · CDF-ES – cycling · CD-VS – variable speed · CMT – Sub-Zero down to −20 °C · CDF HP – high pressure up to 45 bar

CD series – non-cycling

For constant compressed air demand, widest flow range

The non-cycling dryers of the CD series are ideal when air demand remains constant over time. Continuous dew point monitoring ensures reliable operation with low pressure drop. The new generation uses up to 10 % less electricity, has up to 27 % less pressure drop and is considerably smaller than its predecessors.

Refrigerant with low global warming potential
New heat exchangers, zero-loss drainage
Air-cooled, Victaulic connections optional
Complies with ISO 8573-1 and ISO 7183

CompAir dryers from 0.42 m³/min to 383.33 m³/min

Model	Flow rate [3°C]	Power consumption	Power supply	Dew point	Max. pressure	Compressed air connection	Refrigerant	Dimensions [W × D × H]	Weight
Model	[m³/min]	[kW]	[V/Ph/Hz]	[ISO class]	[bar g]	[BSP]	Refrigerant	[mm]	[kg]
CD4F	0,42	0,12	230/1/50	4	16	⅜"	R513A	305 × 360 × 408	19
CD7F	0,70	0,14	230/1/50	4	16	½"	R513A	390 × 432 × 453	26
CD9F	0,90	0,17	230/1/50	4	16	½"	R513A	390 × 432 × 453	28
CD12F	1,20	0,17	230/1/50	4	16	½"	R513A	390 × 432 × 453	28
CD18F	1,80	0,41	230/1/50	4	16	¾"	R513A	420 × 516 × 563	36
CD24F	2,40	0,5	230/1/50	4	16	¾"	R513A	420 × 516 × 563	42
CD30F	3,00	0,5	230/1/50	4	16	¾"	R513A	420 × 516 × 563	44
CD37F	3,75	0,7	230/1/50	4	16	1"	R513A	485 × 595 × 614	48
CD43F	4,33	0,81	230/1/50	4	16	1"	R513A	485 × 595 × 614	49
CD50F	5,00	0,61	230/1/50	4	16	1 – ½"	R513A	500 × 718 × 980	79
CD60F	6,00	0,74	230/1/50	4	16	1 – ½"	R513A	500 × 718 × 980	79
CD80F	8,00	0,81	230/1/50	4	16	1 – ½"	R513A	500 × 718 × 980	85
CD100F	10,00	1,26	230/1/50	4	16	2"	R513A	779 × 720 × 1360	134
CD130F	13,00	1,67	400/3/50	4	13	2"	R513A	779 × 720 × 1360	164
CD160F	15,83	2,03	400/3/50	4	13	2"	R513A	779 × 720 × 1360	168
CD216F	21,67	2,24	400/3/50	4	14	3"	R513A	806 × 1012 × 1539	234
CD250F	25,00	2,58	400/3/50	4	14	3"	R513A	806 × 1012 × 1539	234
CD300F	30,00	3,1	400/3/50	4	14	3"	R513A	806 × 1012 × 1539	234
CD375F	37,50	3,65	400/3/50	4	14	3"	R513A	806 × 1012 × 1539	290
CD430F	43,33	4,22	400/3/50	4	14	3"	R513A	806 × 1012 × 1539	290
CDA533F	53,33	6,38	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	417
CDA700F	70,00	5,96	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	465
CDA800F	80,00	6,81	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	465
CD900F	90,00	9,81	400/3/50	4	13	DN150 PN16	R513A	1510 × 1500 × 1555	780
CD1000F	100,00	10,9	400/3/50	4	13	DN150 PN16	R513A	1510 × 1500 × 1555	780
CD1460F	146,67	13,2	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1570	1058
CD1600F	160,00	13,56	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1570	1128
CD1920F	191,67	16,24	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1570	1205
CD2920F	293,33	26,4	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2116
CD3200F	320,00	27,12	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2256
CD3840F	383,33	32,48	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2720

CD series – non-cycling: CompAir dryers from 0.42 m³/min to 383.33 m³/min

Water-cooled from 10.00 m³/min to 383.33 m³/min

Model	Flow rate [3°C]	Power consumption	Power supply	Dew point	Max. pressure	Compressed air connection	Refrigerant	Dimensions [W × D × H]	Weight
Model	[m³/min]	[kW]	[V/Ph/Hz]	[ISO class]	[bar g]	[BSP]	Refrigerant	[mm]	[kg]
CD100FW	10,00	0,96	230/1/50	4	16	2"	R513A	752 × 750 × 1273	143
CD130FW	13,00	1,55	400/3/50	4	13	2"	R513A	752 × 750 × 1273	168
CD160FW	15,83	1,89	400/3/50	4	13	2"	R513A	752 × 750 × 1273	168
CD216FW	21,67	2,04	400/3/50	4	14	3"	R513A	806 × 1012 × 1422	265
CD250FW	25,00	2,36	400/3/50	4	14	3"	R513A	806 × 1012 × 1422	265
CD300FW	30,00	2,83	400/3/50	4	14	3"	R513A	806 × 1012 × 1422	265
CD375FW	37,50	3,38	400/3/50	4	14	3"	R513A	806 × 1012 × 1422	375
CD430FW	43,33	3,90	400/3/50	4	14	3"	R513A	806 × 1012 × 1422	375
CDA533FW	53,33	5,7	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	460
CDA700FW	70,00	5,38	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	486
CDA800FW	80,00	6,15	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	486
CD900FW	90,00	8,98	400/3/50	4	13	DN150 PN16	R513A	1510 × 1500 × 1437	740
CD1000FW	100,00	9,973	400/3/50	4	13	DN150 PN16	R513A	1510 × 1500 × 1437	740
CD1460FW	146,67	12,14	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1440	1010
CD1600FW	160,00	12,43	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1440	1060
CD1920FW	191,67	14,9	400/3/50	4	13	DN200 PN16	R513A	2270 × 1590 × 1440	1117
CD2920FW	293,33	24,28	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2020
CD3200FW	320,00	24,86	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2120
CD3840FW	383,33	29,8	400/3/50	4	13	2 x DN200 PN16	R513A	4600 × 1590 × 1570	2234

CD series – non-cycling: water-cooled from 10.00 m³/min to 383.33 m³/min

CDF-ES – cycling

For fluctuating demand: saves electricity at part load

In the cycling dryer, a glycol circuit cools the compressed air. When demand drops, the refrigeration compressor can switch off while the glycol continues to cool. This saves energy when air demand rises and falls over the course of the day.

Up to 10 % less electricity, up to 27 % less pressure drop
Up to 40 % smaller footprint
Three-layer heat exchangers, glycol pumps
Zero-loss Smart Drain
iConn-ready

Technical data

Model	Flow rate 3°C	Power consumption	Power supply	Dew point	Max. pressure	Compressed air connection	Refrigerant	Dimensions [W × D × H]	Weight	Recommended filter**
Model	[m³/min]	[kW]	[V/Ph/Hz]	[ISO class]	[bar g]	[BSP]	Refrigerant	[mm]	[kg]	Recommended filter**
CD9F-ES	0,90	0,24	230/1/50	4	16	½”	R513A	386 × 500 × 651	39	CF013
CD12F-ES	1,20	0,32	230/1/50	4	16	½”	R513A	386 × 500 × 651	43	CF013
CD18F-ES	1,80	0,45	230/1/50	4	16	¾”	R513A	386 × 500 × 651	48	CF018
CD24F-ES	2,40	0,51	230/1/50	4	16	¾”	R513A	386 × 500 × 651	51	CF025
CD30F-ES	3,00	0,54	230/1/50	4	16	1”	R513A	423 × 567 × 771	67	CF032
CD40F-ES	4,00	0,846	230/1/50	4	16	1”	R513A	423 × 567 × 771	71	CF067
CD50F-ES	5,00	0,65	230/1/50	4	16	1½”	R513A	500 × 718 × 980	105	CF067
CD60F-ES	6,00	0,78	230/1/50	4	16	1½”	R513A	500 × 718 × 980	108	CF067
CD80F-ES	8,00	0,84	230/1/50	4	16	1½”	R513A	500 × 718 × 980	120	CF0100
CD100F-ES	10,00	1,05	230/1/50	4	16	2”	R513A	779 × 720 × 1360	186	CF0100
CD130F-ES	13,00	1,62	400/3/50	4	13	2”	R513A	779 × 720 × 1360	227	CF0133
CD160F-ES	15,83	2,08	400/3/50	4	13	2”	R513A	779 × 720 × 1360	237	CF0167
CD216F-ES	21,67	2,32	400/3/50	4	14	3”	R513A	806 × 1012 × 1539	394	CF0260
CD250F-ES	25,00	2,68	400/3/50	4	14	3”	R513A	806 × 1012 × 1539	394	CF0260
CD300F-ES	30,00	3,22	400/3/50	4	14	3”	R513A	806 × 1012 × 1539	394	CF0305
CD375F-ES	37,50	3,74	400/3/50	4	14	3”	R513A	806 × 1012 × 1539	399	CF0383
CD430F-ES	43,33	4,32	400/3/50	4	14	3”	R513A	806 × 1012 × 1539	399	CF0450
CDA533F-ES	53,33	6,68	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	810	CF0700
CDA700F-ES	70,00	6,80	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	840	CF0700
CDA800F-ES	80,00	7,18	400/3/50	4	14	DN150 PN16	R513A	880 × 1819 × 1796	840	CF0950
CDA900F-ES	90,00	9,12	400/3/50	4	13	DN150 PN16	R513A	1140x2135x1910	1123	CF0950
CDA1100F-ES	110,00	11,12	400/3/50	4	13	DN200 PN16	R513A	1140x2135x1910	1152	CF1250
CDA1250F-ES	125,00	13,42	400/3/50	4	13	DN200 PN16	R513A	1140x2135x1910	1170	CF1250

CDF-ES – cycling: technical data

Features

Features	CD9F-ES – CD40F-ES	CD50F-ES – CD80F-ES	CD100F-ES – CD160F-ES	CD216F-ES – CD900F-ES
Features	CD9F-ES – CD40F-ES	CD50F-ES – CD80F-ES	CD100F-ES – CD160F-ES	CD216F-ES – CD900F-ES
Dew point display	•	•	•	•
On/off switch	• 1]	•	•	•
Remote alarm signal connection	•	•	•	•
High-pressure switch			•	•
Fan pressure switch			• 2]	•
Alarm history (latest entries)	10	10	10	50
Heat exchanger layers	1 × 3	1 × 3	1 × 3	2 × 2
Frost protection	•	•	•	•
Zero-loss intelligent drain	•	•	•	•
Glycol manifold	•	•	•	•
Aluminium heat exchanger	•	•	•	•
% energy saving display	•	•	•	•
Number of sensors*	2	2	2	4
Fast restart			•	•

CDF-ES – cycling: features

• Standard feature
* 2 sensors = glycol control and refrigeration circuit, 4 sensors = glycol control, refrigerant suction, ambient temperature, compressor oil
** We recommend installing additional pre-filters and after-filters depending on air quality requirements
1] Only on CD30F-ES & CD40F-ES
2] Only on CD130F-ES & CD160F-ES

CD-VS – variable speed

Inverter for compressor and fan, R513A refrigerant

The CD-VS continuously adapts the output of the refrigeration compressor and fans to the actual heat load. This keeps the dew point very stable and lowers operating costs. At very low load it can operate in cycling or non-cycling mode.

R513A refrigerant: low GWP, non-toxic, non-flammable
DMC55 controller with 4.3-inch touchscreen
Display of current power consumption
Weekly timer, Modbus RS485

Model	Refrigerant	Flow rate			Pressure drop	Connections	Power supply	Dimensions [mm]			Weight
Model	Refrigerant	[m³/h]	[l/min]	[scfm]	[bar]	[Ø]	[Ph/V/Hz]	A	B	C	[kg]
CD21VS	R513A	1260	21000	742	0,1	DN 80 PN16	3/400/50-60	790	1000	1465	249
CD30VS	R513A	1800	30000	1060	0,12	DN 80 PN16	3/400/50-60	790	1000	1465	276
CD36VS	R513A	2208	36800	1300	0,13	DN 80 PN16	3/400/50-60	790	1000	1465	296
CD40VS	R513A	2400	40000	1413	0,09	DN 100 PN16	3/400/50-60	1135	1205	1750	510
CD50VS	R513A	3000	50000	1766	0,08	DN 100 PN16	3/400/50-60	1135	1205	1750	590
CD60VS	R513A	3600	60000	2119	0,12	DN 100 PN16	3/400/50-60	1135	1205	1750	597
CD72VS	R513A	4416	73600	2600	0,13	DN 100 PN16	3/400/50-60	1135	1205	1750	669
CD90VS	R513A	5400	90000	3178	0,12	DN 150 PN16	3/400/50	1300	1750	1810	1000
CD110VS	R513A	6624	110400	3900	0,13	DN 150 PN16	3/400/50	1300	1750	1810	1110
CD120VS	R513A	7200	120000	4238	0,12	DN 200 PN16	3/400/50	1400	2200	1870	1330
CD150VS	R513A	8832	147200	5200	0,13	DN 200 PN16	3/400/50	1400	2200	1870	1510

CD-VS – variable speed

Models with 60 Hz power supply on request.
Options & accessories – WC: water cooling with shell-and-tube condenser
Options & accessories – BY-PASS: bypass group (only for CD21VS–CD36VS)

CMT – Sub-Zero down to −20 °C

Sub-zero dew point at the cost of a refrigeration dryer

The CMT is a regenerative refrigeration dryer: it reaches a pressure dew point of −20 °C, i.e. ISO class 3, while remaining as economical and low-maintenance as a refrigeration dryer. For many applications that previously required a desiccant dryer, it is the more cost-effective solution.

Pressure dew point −20 °C (ISO class 3)
Multi-stage cooling with pre-cooler and reheating
Less energy than a desiccant dryer
No desiccant, no purge air loss

Model	Capacity	Operating performance	Dimensions [mm]			Weight
Model	[m³/hr]	[kW]	Length	Width	Height	[kg]
CMT60	360	1,46	1063	899	1767	352
CMT70	420	1,78	1063	899	1670	352
CMT266	1600	5,75	1500	1400	1898	750

CMT – Sub-Zero down to −20 °C

* The data refer to an air intake of FAD 20 °C, 1 bar and the following operating conditions: 7 bar working pressure, −20 °C pressure dew point, 25 °C ambient temperature, 35 °C compressed air inlet temperature.

CDF HP – high pressure up to 45 bar

For PET blow moulding, waterjet cutting and valve testing

Ten robust, compact high-pressure dryers for working pressures up to 45 bar and ambient temperatures up to 50 °C. They maintain a pressure dew point of +3 °C at 88 to 1,200 m³/h (at 40 bar).

Three-in-one stainless steel heat exchanger
10% more efficient than their predecessors, R513A refrigerant
Variable fan speed, hot gas bypass
Dew point display, remote alarm, alarm history

Model	Part no.	Flow rate 40 bar g		Maximum pressure	Power	Refrigerant	Dimensions W×D×H	Connections	Weight
Model	[CCN]	[m³/h]	[m³/min]	[bar]	[kW]	Refrigerant	[mm]	[BSP]	[kg]
CD14F HP45	47757390001	88	1,47	45	0,371	R513A	390 × 432 × 443	3/4"	27
CD18F HP45	47757391001	108	1,80	45	0,371	R513A	390 × 432 × 443	3/4"	28
CD30F HP45	47757392001	180	3,00	45	0,605	R513A	420 × 516 × 551	3/4"	31
CD38F HP45	47757393001	225	3,75	45	0,605	R513A	420 × 516 × 551	3/4"	33
CD45F HP45	47757394001	270	4,50	45	0,879	R513A	420 × 516 × 551	3/4"	36
CD60F HP45	47757395001	360	6,00	45	1,405	R513A	420 × 516 × 551	3/4"	40
CD80F HP45	47757396001	480	8,00	45	1,41	R407C	500 × 680 × 980	1-1/4"	80
CD80F HP45	47757397001	480	8,00	45	1,71	R407C	500 × 680 × 980	1-1/4"	80
CD110F HP45	47757398001	660	11,00	45	1,92	R407C	500 × 680 × 980	1-1/4"	83
CD110F HP45	47757399001	660	11,00	45	2,28	R407C	500 × 680 × 980	1-1/4"	83
CD165F HP45	47757400001	990	16,50	45	1,92	R407C	520 × 770 × 1195	1-1/4"	110
CD165F HP45	47757401001	990	16,50	45	2,28	R407C	520 × 770 × 1195	1-1/4"	110
CD200F HP45	47757402001	1200	20,00	45	2,24	R407C	520 × 770 × 1195	1-1/4"	120
CD200F HP45	47757403001	1200	20,00	45	2,28	R407C	520 × 770 × 1195	1-1/4"	120

CDF HP – high pressure up to 45 bar

Frequently asked questions

Refrigeration dryer or desiccant dryer?

A refrigeration dryer reaches a pressure dew point of +3 °C and is sufficient for most applications; it needs little energy and maintenance. If pipes run outdoors or in cold rooms, or the process requires very dry air, you need a desiccant dryer with −40 °C or −70 °C. In between lies the Sub-Zero dryer with −20 °C.

What is the pressure dew point?

The temperature at which the moisture in the compressed air begins to condense. The lower the pressure dew point, the drier the air. ISO 8573-1 divides air quality into classes accordingly: class 4 corresponds to +3 °C, class 3 to −20 °C, class 2 to −40 °C and class 1 to −70 °C.

Cycling or non-cycling?

If your air demand is steady, a non-cycling dryer is the simpler choice. If it fluctuates widely, a cycling or variable speed dryer saves electricity because it works less at part load.

What maintenance does a refrigeration dryer need?

Very little: check and clean the condensate drain, filters and heat exchanger, and check the dew point. We take care of this as part of compressor maintenance.

Who maintains the compressor?

We do. As the CompAir partner for north-western Switzerland, we maintain and repair your system with genuine spare parts and service kits. If your compressed air supply fails, you can reach our on-call service on 062 552 00 88.

Downloads

CD series refrigeration dryers – brochure

Download

CDF-ES cycling refrigeration dryers – brochure

Download

CD-VS refrigeration dryers – brochure

Download

CMT sub-zero dryers – brochure

Download

High-pressure refrigeration dryers – brochure

Download

CompAir compressed air treatment – overview

Download

Which dryer is right for your system?

Flow rate, pressure, required pressure dew point and the environment determine the choice. We size the dryer and filters to suit your compressor, install them and take care of service.

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