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Grassair DW 21

Grassair DW 21 (A7) industrial refrigerated air dryer / compressed air dryer for compressor systems.

The Grassair DW 21 is a compact industrial refrigerated air dryer designed for moisture removal in compressed air systems. Its purpose is to reduce the water content in compressed air produced by a compressor, helping to protect pneumatic machines, tools, valves, and pipework against condensate, corrosion, and failures.

The unit is suitable for workshops, automotive service facilities, CNC machines, paint systems, pneumatic tools, and general industrial compressed air treatment applications.

Main features:
Grassair DW 21 (A7) industrial refrigerated air dryer
For compressed air compressor systems
Compact, floor-standing design
Refrigeration compressor system
Condensate separation / condensate drain
Designed for stable, continuous industrial operation
230 V single-phase power supply
CE marked
R404A refrigerant
Robust and service-friendly construction
Made in Italy

Technical data:
Manufacturer: Grassair
Model: DW 21 (A7)
Type: refrigerated air dryer / compressed air dryer
Year of manufacture: 2011
Country of manufacture: Italy
Weight: 53 kg
Air flow capacity: approx. 3,600 l/min
Air flow capacity: approx. 216 m³/h
Maximum working pressure: 13 bar
Maximum pressure: 13 bar
Pressure drop: approx. 0.2 bar
Pressure dew point: approx. +3 °C
Maximum inlet air temperature: 55 °C
Maximum ambient temperature: 43 °C
Power supply: 230 V
Frequency: 50 Hz
Phase: 1 phase
Power consumption: 1.08 kW
Refrigerant type: R404A
Refrigerant quantity: 0.65 kg
Dimensions: approx. 750 × 470 × 740 mm
Manufacturer marking: Oss, Netherlands
CE marking: yes

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Important note:
The unit contains fluorinated greenhouse gas. Installation, service, and any refrigerant-related work should be carried out by qualified personnel. The buyer should verify that the dryer capacity and connection data are suitable for their existing compressed air / compressor system before purchase.

Condition: used, available for inspection and testing
Location: Budapest, Hungary

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