High temperature refrigerated dryers
Takes air straight off the compressor at up to 80 °C, with no pre-cooler.
Technical data
- Free air delivery
- 1.2 – 65 m³/min (42 – 2,295 cfm)
- Motor power
- 7.5 – 355 kW
- Weight
- 46 – 600 kg
Overview
A standard refrigerant dryer expects air at around 35 to 45 °C. Air coming straight off a compressor without an aftercooler can be 70 or 80 °C, and feeding that to a standard dryer either trips it or ruins it.
The usual fix is an aftercooler, and where there is room for one that is the right answer. Where there is not — a retrofit, a tight skid, a machine whose aftercooler has been outgrown — a high temperature dryer handles the inlet directly.
Key benefits
Up to 80 °C inlet
Takes the air as the compressor delivers it, with no separate aftercooler in the line.
Saves a component and its space
One item instead of two, which on a retrofit into an existing plant room is often the deciding factor.
Built for the heat
Oversized condenser and a heat exchanger designed for the duty rather than a standard one pushed past its rating.
Standard 3 °C dew point
Same outlet performance as an ordinary refrigerant dryer. The difference is what it will accept at the inlet.
When to use one
On a retrofit where there is no room for an aftercooler, or where the existing aftercooler has been outgrown because the compressor was replaced with a larger one and the cooler was not.
On a skid or a container where every component has to justify its footprint. One high temperature dryer occupies less than an aftercooler plus a standard dryer.
Where ambient conditions make an air cooled aftercooler ineffective. In a plant room that is already at 45 °C, an air cooled aftercooler has very little temperature difference to work with and the dryer downstream sees hot air regardless.
- Retrofits with no space for an aftercooler
- Skids and containerised stations
- Hot plant rooms where aftercooling is ineffective
- Compressor upgraded, aftercooler not
- 3 °C pressure dew point at outlet
- Cyclone separator still required upstream
Model range
- Free air delivery
- 1.2 m³/min
- Connection
- G3/4 in
- Dimensions L x W x H
- 500 × 450 × 700 mm
- Free air delivery
- 1.6 m³/min
- Connection
- G3/4 in
- Dimensions L x W x H
- 500 × 450 × 700 mm
- Free air delivery
- 2.6 m³/min
- Connection
- G1 in
- Dimensions L x W x H
- 500 × 460 × 750 mm
- Free air delivery
- 3.8 m³/min
- Connection
- G1-1/2 in
- Dimensions L x W x H
- 600 × 500 × 775 mm
- Free air delivery
- 6.5 m³/min
- Connection
- G1-1/2 in
- Dimensions L x W x H
- 600 × 560 × 860 mm
- Free air delivery
- 8.5 m³/min
- Connection
- G2 in
- Dimensions L x W x H
- 620 × 550 × 910 mm
- Free air delivery
- 11.5 m³/min
- Connection
- G2 in
- Dimensions L x W x H
- 1200 × 632 × 1206 mm
- Free air delivery
- 13.5 m³/min
- Connection
- G2 in
- Dimensions L x W x H
- 1200 × 632 × 1206 mm
- Free air delivery
- 18.5 m³/min
- Connection
- G2-1/2 in
- Dimensions L x W x H
- 1200 × 720 × 1310 mm
- Free air delivery
- 20.5 m³/min
- Connection
- G3 in
- Dimensions L x W x H
- 1200 × 720 × 1310 mm
- Free air delivery
- 25 m³/min
- Connection
- G3 in
- Dimensions L x W x H
- 1200 × 720 × 1310 mm
- Free air delivery
- 35 m³/min
- Connection
- G4 in
- Dimensions L x W x H
- 1400 × 1000 × 1575 mm
- Free air delivery
- 45 m³/min
- Connection
- DN100
- Dimensions L x W x H
- 1400 × 1000 × 1575 mm
- Free air delivery
- 55 m³/min
- Connection
- DN125
- Dimensions L x W x H
- 1485 × 1030 × 1945 mm
- Free air delivery
- 65 m³/min
- Connection
- DN125
- Dimensions L x W x H
- 1485 × 1030 × 1945 mm
GAD series, inlet air up to 70 °C
- Free air delivery
- 1.2 m³/min (43 scfm)
- Connection
- G 3/4
- Weight
- 46 kg
- Dimensions L x W x H
- W 280 × D 660 × H 620 mm
- Free air delivery
- 1.8 m³/min (63 scfm)
- Connection
- G 3/4
- Weight
- 52 kg
- Dimensions L x W x H
- W 280 × D 660 × H 650 mm
- Free air delivery
- 2.4 m³/min (88 scfm)
- Connection
- G 1
- Weight
- 70 kg
- Dimensions L x W x H
- W 340 × D 720 × H 760 mm
- Free air delivery
- 3.6 m³/min (135 scfm)
- Connection
- G 1 1/2
- Weight
- 77 kg
- Dimensions L x W x H
- W 380 × D 800 × H 840 mm
- Free air delivery
- 7.2 m³/min (240 scfm)
- Connection
- G 1 1/2
- Weight
- 125 kg
- Dimensions L x W x H
- W 500 × D 930 × H 940 mm
- Free air delivery
- 10.8 m³/min (317 scfm)
- Connection
- G 2 1/2
- Weight
- 180 kg
- Dimensions L x W x H
- W 540 × D 1100 × H 1040 mm
- Free air delivery
- 15.0 m³/min (459 scfm)
- Connection
- G 2 1/2
- Weight
- 230 kg
- Dimensions L x W x H
- W 560 × D 1330 × H 1040 mm
- Free air delivery
- 18.0 m³/min (635 scfm)
- Connection
- DN80
- Weight
- 255 kg
- Dimensions L x W x H
- W 630 × D 1400 × H 1080 mm
- Free air delivery
- 24.0 m³/min (812 scfm)
- Connection
- DN80
- Weight
- 320 kg
- Dimensions L x W x H
- W 710 × D 1500 × H 1200 mm
- Free air delivery
- 27.0 m³/min (987 scfm)
- Connection
- DN80
- Weight
- 370 kg
- Dimensions L x W x H
- W 710 × D 1500 × H 1200 mm
- Free air delivery
- 36.0 m³/min (1200 scfm)
- Connection
- DN100
- Weight
- 550 kg
- Dimensions L x W x H
- W 900 × D 1650 × H 1350 mm
- Free air delivery
- 45.0 m³/min (1588 scfm)
- Connection
- DN125
- Weight
- 560 kg
- Dimensions L x W x H
- W 1900 × D 1000 × H 1500 mm
- Free air delivery
- 51.0 m³/min (1925 scfm)
- Connection
- DN125
- Weight
- 600 kg
- Dimensions L x W x H
- W 2100 × D 1100 × H 1600 mm
FAD measured to ISO 1217 Edition 4, Annex C and E at 1 bar a intake, 20°C, 0% humidity. Noise measured to ISO 2151 in free field conditions, tolerance ± 3 dB(A). Water-cooled versions of every model are available. Ask us for their sheet.
A machine without a weight beside it is built to order. The enclosure, the cooling and anything else specified for the site all change what it weighs, so there is no single catalogue figure to print. The net weight is supplied with the configured quotation and the arrangement drawing, and again on the shipping documents. Ask us
Frequently asked questions
Is it less efficient than a standard dryer plus aftercooler?
Slightly, on energy. It wins on space, on capital cost and on having one fewer item to install and maintain.
Do I still need a water separator?
Yes. A great deal of water drops out as that air cools, and it has to go somewhere other than into the dryer's heat exchanger.
What dew point does it give?
Around 3 °C, the same as a standard refrigerant dryer. Where you need lower than that you need a desiccant dryer regardless of the inlet temperature.
What inlet temperature can it take?
Up to 80 °C, which covers air taken straight off a compressor with no aftercooler in the line.
When is it the right choice?
Retrofits with no room for an aftercooler, skids and containers where space is scarce, and hot plant rooms where air cooling an aftercooler achieves little.
Why is the condenser oversized?
Because it is rejecting the heat that an aftercooler would otherwise have removed. A standard dryer pushed to this duty would trip on high pressure.
Can it handle a hot plant room too?
Ambient rating is separate from inlet rating and both are stated. In a plant room already at 45 °C we check the two together rather than assuming.
Does it need more maintenance?
The condenser needs keeping clean, and in a dusty plant room that is the item most often neglected. Otherwise the schedule is the same as any refrigerant dryer.
Will it cope if the compressor is upgraded?
Only within its rated flow. A dryer sized for the old machine is the commonest cause of wet air after a compressor is replaced.
Is the drain included?
Yes, and there is a lot of condensate at this inlet temperature. An automatic drain is specified with it rather than left to site.
Related products
Refrigerant air dryers
The standard, low-cost way to reach a +3 °C pressure dew point.
- Free air delivery
- 1.5 – 383.33 m³/min (53 – 13,537 cfm)
- Working pressure
- 13 – 16 bar g
- Motor power
- 0.5 – 32.48 kW
Desiccant air dryers
Dew points down to −70 °C for critical and outdoor pipework.
- Free air delivery
- 6.7 – 141.7 m³/min (237 – 5,004 cfm)
- Weight
- 285 – 4,400 kg
Membrane air dryers
Silent, power-free drying for small flows and point-of-use.
Learn more
Heatless adsorption dryers
Minus 40 °C dew point with no heater. Simple, reliable, uses purge air.
- Free air delivery
- 1.2 – 80 m³/min (42 – 2,825 cfm)
- Weight
- 35 – 1,850 kg
Not sure which model you need?
Send us your air demand, working pressure and running hours. Our engineers will size the machine and send a written recommendation, no cost, no obligation.