Compressed air gas purifier MRD series

Product overview
Mairui gas dehumidification membrane modules use hollow-fiber polysulfone membranes to remove water vapor from compressed or process gases. Modules are designed as final-stage dryers or for polishing compressed air streams where a low dew point is required.

How it works
Hollow-fiber membranes preferentially permeate water vapor. Feed gas flows along the fiber bore while water vapor diffuses through the membrane wall and is carried away by a purge gas stream, producing a drier outlet gas suitable for downstream dry-air applications.

Models & installation specifications

• MRD-1307A — Ø45 × 210 mm; 0.4 kg; Inlet: Rc1/4"; Dry outlet: Rc1/4"
• MRD-1508A — Ø55 × 230 mm; 0.65 kg; Inlet: Rc1/2"; Dry outlet: Rc1/2"
• MRD-1512A — Ø55 × 355 mm; 0.9 kg; Inlet: Rc1/2"; Dry outlet: Rc1/2"
• MRD-1522A — Ø55 × 585 mm; 1.4 kg; Inlet: Rc1/2"; Dry outlet: Rc1/2"
• MRD-2022A — Ø62 × 590 mm; 1.8 kg; Inlet: Rc3/8"; Dry outlet: Rc3/8"
• MRD-3032A — Ø110 × 860 mm; 6 kg; Inlet: Rc1/2"; Dry outlet: Rc1/2"

Materials & construction

• Membrane type: hollow-fiber polysulfone
• Typical construction: compact cartridge module for inline installation

Standard performance
Reference conditions

• Feed pressure: 0.7 MPa
• Feed temperature: 20°C
• Feed dew point: 20°C at 0.7 MPa
• Flow unit: L/min
• Outlet dew-point basis: atmospheric dew point

Performance example (standard conditions)

• Purge ratio: 20%
• Feed air flow: 37.5 L/min
• Dry air flow: 30 L/min
• Outlet dew point: −18°C (atmospheric basis)

Engineering notes

• Outlet dew point must be interpreted with its stated basis; values on this page use atmospheric dew point as the reference.
• Actual performance depends on feed pressure, temperature, feed dew point, flow rate and purge ratio; validate performance under your operating conditions.

Technical specifications

• Product family: Gas dehumidification membrane modules (MRD series)
• Materials: hollow-fiber polysulfone membrane
• Available models: MRD-1307A, MRD-1508A, MRD-1512A, MRD-1522A, MRD-2022A, MRD-3032A
• Connections: Rc1/4", Rc3/8" or Rc1/2" depending on model
• Reference operating conditions specified above; consult Mairui for custom configurations