Adsorption / Desiccant Dryers

Our desiccant dryers provide high-quality dry air to prevent microbial growth and corrosion, within ranges from -20°C to -70°C pressure dew point. They deliver uncompromising performance in demanding applications. They also have lower pressure drop and save energy, making drying systems more efficient.

Adsorption (Desiccant) Dryers

Ultrapac SMART

Compact modular twin-tower heatless adsorption dryer, ISO Class 2-2-2. Capacity 5–100 m³/h (3–58 CFM). Connections 1/2" to 1". Available in Standard and Superplus build (Superplus adds dew-point transmitter and touch display). Integrated UltraPleat pre/after filters and UltraSilencer.

Technology:
Heatless twin-tower desiccant (ISO 2-2-2)

Dewpoint
−40°C

Flow Range (m³/min)
0.1 – 2.8

Adsorption (Desiccant) Dryers

Oilfreepac SMART

Oil-free-class variant of Ultrapac SMART, ISO Class 2-2-1, for oil-free compressor installations. 5–100 m³/h (3–58 CFM). 1/2" to 1" connections. Standard and Superplus versions. Same compact integrated-filtration design.

Technology:
Heatless twin-tower desiccant (ISO 2-2-1)

Dewpoint
−40°C

Flow Range (m³/min)
0.1 – 2.8

Adsorption (Desiccant) Dryers

Ultrapure SMART ALG

Breathing-air purification version of the SMART platform delivering EN-compliant breathable air. 5–100 m³/h (3–58 CFM). 1/2" to 1" connections. Standard and Superplus builds. Integrated multi-stage filtration.

Technology:
Heatless desiccant — breathing air purifier

Dewpoint
−40°C

Flow Range (m³/min)
0.1 – 2.8

Adsorption (Desiccant) Dryers

Ultrapac HL-ALD

Large-capacity heatless adsorption dryer, 100–850 m³/h (58–493 CFM). −40°C standard PDP; −70°C available on request. Connections 1" to 2". Inclusive of dew-point dependent control. Sizing at 7barg/35°C.

Technology:
Heatless twin-tower desiccant (large)

Dewpoint
−40°C / −70°C

Flow Range (m³/min)
1.7 – 14.2

Adsorption (Desiccant) Dryers

Ultrapac HL-OFP

Oil-free large-capacity heatless adsorption dryer, ISO Class 2-2-1, 100–850 m³/h (58–493 CFM). −40°C standard; −70°C on request. Connections 1" to 2". Dew-point dependent control included.

Technology:
Heatless desiccant — oil free (ISO 2-2-1)

Dewpoint
−40°C / −70°C

Flow Range (m³/min)
1.7 – 14.2

Adsorption (Desiccant) Dryers

Ultrapac HL-ALG

Breathing-air heatless adsorption dryer certified to EN12021, 100–850 m³/h (58–493 CFM). −40°C standard; −70°C on request. Connections 1" to 2". Dew-point dependent control included.

Technology:
Heatless desiccant — breathing air (EN12021)

Dewpoint
−40°C / −70°C

Flow Range (m³/min)
1.7 – 14.2

NOTES: (1) Flow ranges converted from catalogue CFM to m³/min (1 m³/min ≈ 35.31 cfm) at stated reference conditions. (2) BURAN CQ rated at +5°C PDP; BURAN DC and SMART/HL adsorption ranges at +3°C / −40°C as shown. (3) Refrigerant ranges use low-GWP R513A (DC series). (4) Adsorption SMART ranges available in Standard and Superplus builds; HL ranges available with −70°C PDP on request. (5) Standard 2-year warranty (5-year on request with full-service contract). Source: Donaldson Industrial Gases price list (FY26-27), Rev 0, June 2026.
Adsorption (Desiccant) Dryers

GDDR (Fixed Speed)

Continuously rotating desiccant drum delivers a consistent −20°C pressure dewpoint without the pressure drop penalty of twin-tower heatless dryers. No switchover, no purge loss on smaller models, no pulsing of pressure. Heater optional on models up to 60 m³/min; standard from 60 m³/min upward. Refrigerant and purge air free. Indoor. PED/CE.

Technology:
Rotating desiccant drum

Dewpoint
−20°C

Flow Range (m³/min)
10 – 150

Adsorption (Desiccant) Dryers

GDDR (Variable Speed)

Variable-speed version of the GDDR drum desiccant dryer. VSD adapts drum rotation speed to match actual flow demand, improving energy efficiency over fixed-speed variant. Same −20°C dewpoint and Class X.3.X performance. Heater optional on smaller, standard from 60 m³/min.

Technology:
Rotating desiccant drum + VSD

Dewpoint
−20°C

Flow Range (m³/min)
10 – 150

Adsorption (Desiccant) Dryers

GDX-M

Compact modular twin-tower heatless desiccant dryer — ideal for point-of-use or small to medium systems. Pre and post filtration included. −40°C standard, optional −70°C. Dew Point Switching (DS) option activates regeneration only when needed, reducing purge air consumption. Class 2.2.1 with integrated filtration. Very compact footprint. Published GBP pricing across all models.

Technology:
Heatless twin-tower (purge air)

Dewpoint
−40°C / −70°C

Flow Range (m³/min)
0.08 – 5.00

Adsorption (Desiccant) Dryers

GDX

Larger capacity twin-tower heatless desiccant dryer (6.7 to 141.7 m³/min). Pre and post filtration included (Class 2.2.1). Available in −40°C PDP standard and −70°C PDP versions. Energy Management System (EMS) option uses dew point control to trigger regeneration only when the desiccant is saturated — significantly reducing purge air losses on variable-demand systems. PED/CE. Published GBP pricing across the full range.

Technology:
Heatless twin-tower (purge air) ± EMS

Dewpoint
−40°C / −70°C

Flow Range (m³/min)
6.7 – 141.7

Adsorption (Desiccant) Dryers

GDHB-TLS

Heated blower system uses an external blower to regenerate desiccant with heated ambient air — eliminating purge air loss entirely. Unlike heatless dryers (15–20% purge loss), GDHB-TLS is highly energy-efficient for high-capacity continuous-duty applications. Pre and post filtration included. −40°C dewpoint. Class 2.2.1. 400/3/50. Range 8.3 to 248.3 m³/min. PED/CE certified.

Technology:
Heated blower — zero purge air loss

Dewpoint
−40°C

Flow Range (m³/min)
8.3 – 248.3

NOTES: (1) All air flow rates rated at +3°C dewpoint, 1 bar(a), 20°C inlet temperature conditions. (2) ISO 8573-1:2010 classification requires appropriate pre and post filtration — see individual product datasheets for complete system class achievable. (3) R513A is a low-GWP HFO/HFC blend (replacing R134a). R452A used in subfreezing GDMT series. R407C used in HP45-50 barG GDDF-HP models. (4) Desiccant dryers achieving −40°C or −70°C PDP are suitable for critical process, instrument air, and pneumatic control applications. (5) Heatless desiccant dryers consume approximately 15–20% of treated air volume for purge/regeneration. Heated blower (GDHB-TLS) eliminates purge loss.
Adsorption (Desiccant) Dryers

K-MT 1–4 (Aluminium)

Compact small-flow heatless twin-tower desiccant dryer. Aluminium construction. Standard −40°C dewpoint; Option 1 = −70°C; Option 2 = −25°C. 230V/1ph/50-60Hz standard; 115V or 24V DC optional. Pipe: ¼" BSPP. Easy maintenance, wall-mount or pipe-mount capability.

Construction:
Modular Aluminium

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.13 – 0.58

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
50

Noise dB(A):
65–86

Adsorption (Desiccant) Dryers

KA-MT 1–4 (Aluminium)

Activated alumina version of K-MT for applications requiring superior moisture adsorption. Same flow range and dimensional envelope. −40°C standard dewpoint; −70°C Option 1; −25°C Option 2. Class 2:2:1 with OIL-X filtration. 230V/1ph/50-60Hz; 115V or 24V DC optional.

Construction:
Modular Aluminium

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.13 – 0.58

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
50

Noise dB(A):
65–86

Adsorption (Desiccant) Dryers

CDAS HL 050–085 (Aluminium)

Medium-flow modular aluminium heatless dryer. Patented purge-saving valve reduces energy vs standard heatless. −40°C standard; −70°C Option 1; −20°C Option 2. Class 2:2:2 with OIL-X filtration. Power: 100–240V ±10% 1ph 50/60Hz; 24V DC optional. Pipe: ½"–1½" BSPP or NPT.

Construction:
Modular Aluminium

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.92 – 5.01

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

CDAS HL 100–170 (Aluminium)

Large-flow modular aluminium heatless dryer (100–170 series). Multi-bank capability: up to 3 × CDAS HL 170 in parallel gives 6,120 m³/hr / 3,600 cfm. −40°C standard; −70°C Option 1; −20°C Option 2. Class 2:2:2 with OIL-X filtration. Power: 100–240V ±10% 1ph 50/60Hz. Pipe: 2"–3" BSPP.

Construction:
Modular Aluminium

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

CDAS LE 100–170 (Aluminium)

Low-energy variant of CDAS HL. Uses vacuum pump to reduce purge air from ~20% to ~3% of reference conditions — significant energy saving. Same −40°C/−70°C/−20°C dewpoint options. Requires HVLAP-OL-02 vacuum pump (ordered separately). 400V 3ph 50Hz standard; 460V 3ph 60Hz optional. Pipe: 2"–3" BSPP.

Construction:
Modular Aluminium — Low Energy

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

OFAS HL 050–085 (Aluminium)

Oil-free-air-system heatless dryer for oil-free compressor installations. Class 2.2.0 with OIL-X filtration (no oil class specified — for use with oil-free compressors). −40°C standard; −70°C Option 1; −20°C Option 2. Same dimensions as CDAS HL 050–085. Power: 100–240V ±10% 1ph 50/60Hz; 24V DC optional.

Construction:
Modular Aluminium — Breathing Air

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.92 – 5.01

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

OFAS HL 100–170 (Aluminium)

Large-flow oil-free-air-system heatless dryer. Class 2.2.0 for oil-free compressor systems. Multi-bank up to 3 × OFAS HL 170. Power: 100–240V ±10% 1ph 50/60Hz. Pipe 2"–3" BSPP. Same correction factors as CDAS HL 100–170.

Construction:
Modular Aluminium — Breathing Air

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

OFAS LE 100–170 (Aluminium)

Low-energy variant of OFAS HL. Uses HVLAP-OL-02 vacuum pump to reduce purge air from ~20% to ~3%. Class 2.2.0. 400V 3ph 50Hz; 460V 3ph 60Hz optional. Multi-bank up to 3 × OFAS LE 170.

Construction:
Modular Aluminium — Low Energy Breathing Air

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

FBP HL 050–085 (Aluminium)

Food/beverage/pharmaceutical grade heatless dryer. Class 1.2.0 with OIL-X filtration — highest particulate and oil-free classification. −40°C standard; −70°C Option 1. Note: −20°C dewpoint NOT available (does not inhibit microbial growth). Power: 100–240V ±10% 1ph 50/60Hz; 24V DC optional. BSPP or NPT.

Construction:
Modular Aluminium — Pharmaceutical/Food

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.92 – 5.01

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

FBP HL 100–170 (Aluminium)

Large-flow food/pharma-grade heatless dryer. Class 1.2.0. Multi-bank up to 3 × FBP HL 170. Power: 100–240V ±10% 1ph 50/60Hz. −20°C NOT available. Pipe 2"–3" BSPP.

Construction:
Modular Aluminium — Pharmaceutical/Food

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

FBP LE 100–170 (Aluminium)

Low-energy food/pharma-grade dryer using HVLAP-OL-02 vacuum pump. Class 1.2.0. Reduces purge from ~20% to ~3%. 400V 3ph 50Hz; 460V 3ph 60Hz optional. Multi-bank up to 3 × FBP LE 170.

Construction:
Modular Aluminium — Low Energy Pharmaceutical/Food

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 102 (3×units)

Pressure Range (bar g):
5 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

CDAS HL ATEX 050–085

ATEX-certified heatless dryer for potentially explosive atmospheres. Fully pneumatic operation — no electrical supply required. Class 2:2:2 with OIL-X filtration. −40°C dewpoint only (standard). Pipe: ½"–1½" BSPP or NPT. Pressure: 4–16 bar(g). Max ambient 55°C.

Construction:
Modular Aluminium — ATEX Zone 1/2

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
0.92 – 5.01

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

MX ATEX (MXP 102CDS–108DS)

ATEX large-flow pneumatically operated heatless dryer. −40°C standard; −70°C Option 1; −20°C Option 2. Class 2:2:2 with OIL-X filtration. Pressure: 4–13 bar(g). Max ambient 55°C. Models MXP102CDS–MXP108DS. Pipe: 2"–2½" BSPP.

Construction:
Modular Aluminium — ATEX Large

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
6.81 – 34 (m³/min)

Pressure Range (bar g):
4 – 13

Max Ambient Temp (°C):
55

Noise dB(A):
<75

Adsorption (Desiccant) Dryers

K-MT 10–95 (Carbon Steel)

Medium-flow twin-tower carbon steel heatless dryer. −40°C standard; −70°C Option 1; −25°C Option 2. Class 2:2:2 with OIL-X filtration. 230V/1ph/50-60Hz standard; 115V or 24V DC optional. Pipe: 1"–2½" BSPP. Noise 65–86 dB(A). Flows at 7 bar(g) referenced to suction performance at 7 bar(g), 35°C dryer inlet temperature, 25°C ambient, 60% RH.

Construction:
Carbon Steel Twin Tower

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
1.8 – 15.7

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
50

Noise dB(A):
65–86

Adsorption (Desiccant) Dryers

KA-MT 10–95 (Carbon Steel)

Activated alumina carbon steel twin-tower medium-flow heatless dryer. −40°C standard; −70°C Option 1; −25°C Option 2. Class 2:2:1. 230V/1ph/50-60Hz; 115V or 24V DC optional. Pipe: 1"–2½" BSPP.

Construction:
Carbon Steel Twin Tower

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
1.8 – 15.7

Pressure Range (bar g):
4 – 16

Max Ambient Temp (°C):
50

Noise dB(A):
65–86

Adsorption (Desiccant) Dryers

KE-MT 120–600 (Carbon Steel)

Large-flow carbon steel twin-tower heatless dryer. −40°C standard; −70°C Option 1; −20°C Option 2. Class 2:2:2. Power: 230V/1ph/50-60Hz; 115V/1ph/50-60Hz optional. Flange connection: DN50–DN125. Max pressure 10 bar(g) standard (higher available on request). Noise: <120 dB(A). Flows referenced to 7 bar(g), 20°C, 1 bar(a).

Construction:
Modular Aluminium — ATEX Large

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
20 – 102 (m³/min)

Pressure Range (bar g):
4 – 10

Max Ambient Temp (°C):
50

Noise dB(A):
<120

Adsorption (Desiccant) Dryers

WVM 45–750 (Carbon Steel)

Large-flow vacuum-assisted low-energy twin-tower heatless dryer. Uses vacuum to reduce purge air. −40°C standard; −70°C Option 1; −20°C Option 2. Class 2:2:2. Power: 400V 3ph 50Hz; optional on request. Flange: DN50–DN150. Max ambient 40°C. Average power 3.6–59.5 kW depending on model. Flows 7.5–121.9 m³/min.

Construction:
Carbon Steel Twin Tower — Low Energy

Dewpoint (Standard °C):
−40

Flow Range (m³/min @7bar):
7.5 – 121.9

Pressure Range (bar g):
4 – 11

Max Ambient Temp (°C):
40

Noise dB(A):
80–85

Adsorption (Desiccant) Dryers

HDK-25 (HDK 18/25–550/25)

High-pressure heatless twin-tower desiccant dryer rated to 25 bar(g). −40°C standard dewpoint; −20°C Option 1. Class 2.2.2 standard; Class 2.3.2 Option 1. Operating pressure 8–25 bar(g). 230V/1ph/50-60Hz; 115V/1ph/50-60Hz optional. BSPP pipe. Noise: 95–115 dB(A). Flows stated at 25 bar(g), 20°C.

Construction:
HDK-25 Bar Compressed Air Dryers

Dewpoint (Standard °C):
25

Flow Range (m³/min @7bar):
25–600 m³/hr @ 25 bar(g)

Pressure Range (bar g):
8

Max Ambient Temp (°C):
-40

Noise dB(A):
95–115

Adsorption (Desiccant) Dryers

HDK-45 (HDK 18/50–550/50)

High-pressure heatless twin-tower desiccant dryer rated to 45 bar(g). −40°C standard; −20°C Option 1. Class 2.2.2; Class 2.3.2 option. Operating pressure 8–45 bar(g). 230V/1ph/50-60Hz; 115V optional. BSPP. Noise: 95–115 dB(A). Flows stated at 45 bar(g).

Construction:
HDK-45 Bar Compressed Air Dryers

Dewpoint (Standard °C):
45

Flow Range (m³/min @7bar):
45–1,063 m³/hr @ 45 bar(g)

Pressure Range (bar g):
8

Max Ambient Temp (°C):
-40

Noise dB(A):
95–115

Adsorption (Desiccant) Dryers

HDK-MT-100 (HDK-MT 15–30/100)

High-pressure heatless twin-tower dryer rated to 100 bar(g). −40°C standard; −20°C Option 1. Class 2.2.2 standard; Class 2.3.2 option. Operating pressure 50–100 bar(g). Min temperature 30°C. 230V/1ph/50-60Hz; 115V optional. BSPP. Noise: 95–115 dB(A).

Construction:
HDK-MT-100 Bar Compressed Air Dryers

Dewpoint (Standard °C):
100

Flow Range (m³/min @7bar):
120–300 m³/hr @ 100 bar(g)

Pressure Range (bar g):
50

Max Ambient Temp (°C):
-40

Noise dB(A):
95–115

Adsorption (Desiccant) Dryers

HDK-MT-350 (HDK-MT 15–30/350)

Ultra-high-pressure heatless twin-tower dryer rated to 350 bar(g). −40°C standard; −20°C Option 1. Class 2.2.2; Class 2.3.2 option. Operating pressure 100–350 bar(g). Min inlet temp 5°C. Max operating temp 55°C. 230V/1ph/50-60Hz; 115V optional. BSPP. Noise: 95–115 dB(A).

Construction:
HDK-MT-350 Bar Compressed Air Dryers

Dewpoint (Standard °C):
350

Flow Range (m³/min @7bar):
200–500 m³/hr @ 350 bar(g)

Pressure Range (bar g):
100

Max Ambient Temp (°C):
-40

Noise dB(A):
95–115

Source: Parker GSFE Product Catalogue 2026 (CATGSFEPRODUCTS2026-00) | All flows @ 7 bar(g), 20°C, 1 bar(a) unless stated

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