Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK
The GAFR50020ALJNWK 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 weighs 950 g, placing it in the mid-large size class for machine headers. This version is set for lower pressure work, regulating from 0.15 to 0.4 MPa (20-58 psi), and uses a 5 um element to catch fine particles.
A built-in diversion structure spins the incoming air to separate liquid water and solid debris into the 108 cc condensate bowl. The automatic drain clears collected liquid without manual attention, making it suitable for wet or unattended lines. The pressed-in, self-locking knob resists vibration drift, helping the balanced regulator hold the set outlet pressure steady as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK |
|---|---|
| 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 | 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 GAFR50020ALJNWK
| 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| N | No pressure gauge; 1/4" gauge connection. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFR50020ALJNWK Is Used
Machine header supply
Feed a 3/4in header serving several pneumatic actuators on a single machine. The 5 um element protects sensitive valves, and the automatic drain keeps the 108 cc bowl from filling during long production runs.
Instrument air pre-filter
Use it ahead of precision controls that need cleaner air than standard shop supply. The fine 5 um element and steady lower-pressure regulation suit applications where consistent 0.15-0.4 MPa output protects delicate components.
Lower-pressure test rig
Set up a test station requiring a stable, low-pressure air supply. The balanced regulator holds the setpoint as line pressure fluctuates, while the automatic drain reduces maintenance on a rig that may run unattended.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNWK the Right Air-Prep Unit?
Choose this GAFR500 body when you need a 3/4in port and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet; it steps down from the GAFR600's 12000 L/min envelope if you need less capacity. The L type caps the regulated range at 0.4 MPa, so confirm your machine never needs more than that. The 5 um element traps finer particles than the standard 40 um, but plan for more frequent element service. This unit ships without a mounting bracket (J) and without a gauge; the 1/4in gauge connection is ready if you add one later. The automatic drain (A) handles condensate removal, and the reverse-flow valve (K) is fitted as an ordering difference. If your line needs lubrication downstream, order the matching GAFC500-20 combination instead. Note that 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 GAFR50020ALJNWK FAQ
Working pressure range is 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C (must not freeze). The drain bowl holds 108 cc and the unit weighs 950 g. It has a 3/4in port, a 5 um element, and an automatic drain.
The J code means the mounting bracket is omitted, for installations using an existing bracket or panel mount. The N code means no gauge is supplied; the 1/4in gauge connection is present if you add one later. The set pressure cannot be read without adding a gauge.
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 GAFR50020ALJNWK
Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.