Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN 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 40 µm filter element and regulates 0.15 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- 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 GAFR500N20SJN
The GAFR500N20SJN is a filter and regulator combined into a single body, cleaning incoming air and holding a steady outlet pressure without needing a separate filter and regulator pair. This 3/4in version works across 0.15-0.9 MPa (20-130 psi) and uses a 40 um element to trap solids and spun-out water droplets in its 108 cc nylon bowl.
With a 950 g mass, this unit belongs in the upper mid-range of the GAFR family, sized for lines that need more flow than a GAFR400 but less than a GAFR600. The nylon bowl and the absence of a gauge keep this build focused on the filtering and regulation basics, with the semi-auto plus manual drain giving operators a choice between automatic purging and hands-on control.
Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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. No gauge is supplied with this model — the gauge connection on a GAFR500 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| J | No bracket (J) — supplied without the mounting bracket. |
| N | No pressure gauge; 1/4" gauge connection. |
| (blank) | Filtering grade 40 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 GAFR500N20SJN Is Used
Machine header supply
Feed a 3/4in header serving several pneumatic actuators on a production machine, where the 8000 L/min plotted envelope at 0.7 MPa inlet provides ample margin for simultaneous operation.
Multi-station assembly line
Regulate air for a multi-station assembly line where consistent pressure across several workstations matters, with the semi-auto drain handling condensate from humid shop air.
Process control panels
Supply clean, regulated air to process control panels with solenoid valves, where the 40 um element protects sensitive components and the 108 cc bowl reduces drain frequency between shifts.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20SJN the Right Air-Prep Unit?
Choose this GAFR500 when a 3/4in line needs clean, regulated air at up to 0.9 MPa. The nylon bowl (N) suits installations where a transparent PC bowl is not preferred, while the 40 um element handles general workshop air; step up to the 5 um element if finer filtration is needed. This model ships without the mounting bracket (J) and without a gauge (N), so plan for a panel mount and add a gauge to the 1/4in connection if you need to read outlet pressure. The semi-auto plus manual drain covers both continuous and operator-triggered condensate removal, and the PT thread with MPa/psi scale matches standard regional fittings. If the downstream line also needs lubrication, order the GAFC500-20 combination instead of adding oil to this unit. 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so keep inlet pressure near the maximum to reach the full regulated output.
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 GAFR500N20SJN FAQ
The GAFR500N20SJN operates over 0.15-0.9 MPa (20-130 psi) with a maximum supply pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It is rated for -5 to 70 C and must not freeze. The unit has a 108 cc condensate bowl and weighs 950 g, with a 3/4in port and a 1/4in gauge connection.
The J code means the mounting bracket is omitted, which suits installations using an existing panel or frame mount. The N code after the port means no gauge is supplied; the 1/4in gauge connection is available if you add one later. This reduces the initial part count for builds that already have these components in place.
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Covers non-human-caused product damage.
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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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