Airtac GAFR Adjustable Filter Regulator GAFR50020SJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SJ 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 materialPC
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020SJ
The GAFR50020SJ is a filter and regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 3/4in port and delivers a regulated output from 0.15 to 0.9 MPa (20-130 psi) with a standard 40 um filter element.
This 950 g unit features a diversion structure that spins incoming air to separate liquid water and solid particles into the 108 cc condensate bowl. The balanced regulator mechanism holds the set outlet pressure steady as supply pressure varies, and the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR50020SJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SJ |
|---|---|
| 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 | PC |
| 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 GAFR50020SJ
| 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". |
| (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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR50020SJ Is Used
Machine header supply
Feed a 3/4in header serving multiple pneumatic actuators on a single machine, where the 108 cc bowl handles condensate from continuous operation.
Multi-station assembly line
Regulate air for a series of stations on a conveyor, providing a steady 0.15-0.9 MPa supply to downstream valves and cylinders.
Process equipment skid
Mount on a process skid with a 3/4in drop leg, using the semi-auto drain for scheduled maintenance and the gauge for quick setpoint verification.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SJ the Right Air-Prep Unit?
Choose this GAFR500 body for 3/4in lines where the 8000 L/min flow envelope (plotted at 0.7 MPa inlet) suits a machine header or multi-station line; step down to a GAFR400 for 1/2in ports with a 7000 L/min envelope. The PC bowl is the standard build, while C (metal) or N (nylon) are options on other bodies. This model ships with both semi-auto and manual drains for flexible servicing, and the standard S pressure range covers most shop air. The J code means no mounting bracket is included, so plan for a panel mount or existing bracket. A circular gauge with MPa/psi scale is fitted, and the PT thread matches common local fittings. For lines needing oil downstream, order the matching GAFC500-20 combination instead. Max supply 1.0 MPa leaves about 0.1 MPa above the 0.9 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 GAFR50020SJ FAQ
Working pressure range is 0.15-0.9 MPa (20-130 psi), with a 1.0 MPa (145 psi) maximum and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C. The drain bowl holds 108 cc and the unit weighs 950 g, with a 3/4in port and 40 um filter element.
The J code omits the bracket for installations using an existing panel mount or frame. This 950 g unit needs proper support from a structure, not from the tubing, so confirm your mounting method before installation.
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Covers non-human-caused product damage.
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