Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW 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 materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW
The GAFR500N20LJW is a filter and regulator combined into a single body, with no lubricator section. It handles a 3/4in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), using a 5 um element to trap fine particles. The nylon bowl collects condensate and solids separated by the internal diversion structure.
This 950 g unit replaces a separate filter plus regulator, reducing potential leak points and saving rail space. The balanced regulator mechanism holds the outlet steady as supply pressure fluctuates, while the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW |
|---|---|
| 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 | Nylon |
| Drain type | Semi-auto drain + manual 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 | Not included (J) |
| 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 GAFR500N20LJW
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| (blank) | Drain: Semi-auto drain + manual drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| J | No bracket (J) — supplied without the mounting bracket. |
| (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 GAFR500N20LJW Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require a stable, lower supply pressure. The 5 um element protects fine internal passages, and the balanced regulator keeps the setpoint steady.
Machine tool coolant lines
Supply a machine tool's air-operated coolant pump where a lower pressure setting prevents over-spray. The 108 cc bowl handles condensate between shifts, and the manual drain allows quick purging.
Test bench air supply
Provide a clean, regulated air source for a laboratory test bench. The 5 um filtration and lower pressure range suit sensitive instrumentation that must not see more than 0.4 MPa.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20LJW the Right Air-Prep Unit?
Choose the GAFR500 body for a 3/4in port with a 108 cc condensate bowl, sized between the GAFR400 (100 cc) and GAFR600 (205 cc). This model has a nylon bowl, a 5 um element for finer filtration, and both semi-auto and manual drains fitted. The L-type regulator tops out at 0.4 MPa, so confirm your system never needs more than that. The J code means no mounting bracket is included, so plan for panel mounting or an existing bracket. A circular gauge is fitted with an MPa/psi scale, and the PT thread matches standard local fittings. If oil is needed downstream, order the matching GAFC500-20 combination instead. For sizing, note that 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 GAFR500N20LJW FAQ
The GAFR500N20LJW has a 3/4in port, a pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 108 cc drain bowl, and weighs 950 g. The unit includes a 5 um element and a circular gauge.
The J code in GAFR500N20LJW means the mounting bracket is omitted. This is for installations where the unit is panel-mounted or secured by an existing bracket. If you need the standard bracket, order the same model without the J suffix.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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