Airtac GAFR Adjustable Filter Regulator GAFR50020ALW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ALW is a genuine two-in-one filter & regulator — a diversion-type water/particulate filter and a balanced pressure regulator built into ONE body. It has 3/4" ports, a 5 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialPC
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ALW
The GAFR50020ALW is a filter & regulator, combining a 40 um-equivalent air filter and a pressure regulator in a single body. This 3/4in unit handles a lower pressure range of 0.15-0.4 MPa (20-58 psi) and comes with a 5 um element for finer filtration. Its automatic drain clears condensate without manual intervention, and the 108 cc bowl holds a substantial amount of liquid.
Weighing 950 g, this unit is designed for a machine header or a multi-station line where a steady, lower pressure is needed. The balanced regulator mechanism holds the set pressure as supply varies, and the pressed-in self-locking knob resists drift from vibration. The diversion structure spins the air to separate liquid water and solid particles into the bowl, protecting downstream components.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ALW |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | PC |
| Drain type | Automatic drain |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 108 cc |
| Bracket | Included |
| Weight | 950 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR50020ALW
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| A | Drain: Automatic drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
The filter and the regulator are ONE body here — there is no separate GAF filter or GAR regulator part to assemble. Need lubrication downstream too? Add a lubricator by ordering the matching GAFC500-20 F.R.L. combination instead.
Size Class & Flow Envelope
- GAFR2001/8"-1/4" · 2000 L/min
- GAFR3001/4"-1/2" · 3500 L/min
- GAFR4003/8"-1/2" · 7000 L/min
- GAFR5003/4" · 8000 L/min
- GAFR6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue at 0.7 MPa inlet pressure — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. Outlet pressure falls as flow rises, so size a body with headroom above your peak demand.
| This model | GAFR500 · 3/4" · curve to 8000 L/min |
|---|---|
| One size down | GAFR400 |
| One size up | GAFR600 (curve to 12000 L/min) |
| Add a lubricator | GAFC500-20 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR50020ALW Is Used
Precision Valve Control
Feed a bank of precision pneumatic valves that require a stable, lower supply pressure, with the 5 um element protecting their fine internal passages from particle wear.
Machine Header Supply
Mount this 3/4in unit on a machine header to supply a consistent 0.15-0.4 MPa to multiple workstations, with the automatic drain handling condensate from a wet main line.
Instrument Air Feed
Use the 5 um filtration to provide cleaner air to sensitive instrumentation or flow-control loops, while the regulator maintains a steady lower pressure for accurate readings.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ALW the Right Air-Prep Unit?
Choose the GAFR500 for a 3/4in port and a 950 g body, which is a step up from the GAFR400's 1/2in port and 880 g. The automatic drain (A) is for unattended or wet lines, while a blank would have meant a semi-auto plus manual drain. The 5 um element (W) traps far finer particles than the standard 40 um, which is better for precision valves but requires more frequent service. The included mounting bracket supports this heavier unit, and the fitted circular gauge with MPa/psi scale lets you read the set pressure directly. This lower-pressure (L) type tops out at 0.4 MPa, so if your machine may ever need more, the standard type is the right choice. If you need lubrication downstream, order the matching GAFC500-20 combination instead. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (3/4" here)
- ✓ Standard 0.9 MPa or lower-pressure 0.4 MPa
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Element 40 µm or 5 µm
- ✓ Bracket kept or removed (J); add a lubricator = GAFC
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, gauge/knob accessible.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure with the pressed-in self-locking knob; pull to adjust, press to lock.
- check Drain condensate before the 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 950 g unit on its bracket, not on the tubing.
This is a filter and regulator only — it delivers filtered, pressure-set air with no added oil. If a downstream tool needs lubrication, add a separate lubricator or order the GAFC500-20 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALW FAQ
The GAFR50020ALW is a filter & regulator with a 3/4in port. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). The operating temperature range is -5 to 70 C. It has a 108 cc drain bowl and weighs 950 g.
The 'L' designates a lower-pressure regulator type, with a maximum regulated output of 0.4 MPa (58 psi). This is about 44% of the standard type's 0.9 MPa ceiling. If your application may require a higher set pressure, you would need the standard type (S) instead.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Air-Preparation Units
Request a Quote for Airtac GAFR Adjustable Filter Regulator GAFR50020ALW
Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.