Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK 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 1/4" 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 size1/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight500 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 GAFR300C08ASJK
The GAFR300C08ASJK is a filter & regulator that combines air filtration and pressure regulation in a single metal-bodied unit. It handles 1/4in ports, delivers 0.15-0.9 MPa (20-130 psi), and uses a 40 um element to trap particles.
Its diversion structure spins incoming air to separate liquid water and solids into the 60 cc drain bowl. The balanced regulator holds the set pressure steady as supply varies, while the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| Bowl material | Metal |
| 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 | 60 cc |
| Bracket | Not included (J) |
| Weight | 500 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 GAFR300C08ASJK
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 08 | Port size 1/4". This body offers 08 = 1/4", 10 = 3/8", 15 = 1/2". |
| A | Drain: Automatic 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. |
| 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 GAFC300-08 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 | GAFR300 · 1/4" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-08 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a small assembly station. The 40 um element protects sensitive spools, and the stable regulated output keeps actuation consistent.
Machine tool air supply
Supply clean, regulated air to a single CNC machine's clamping fixtures. The automatic drain removes condensate without manual checks, and the metal bowl suits a shop-floor environment.
Test bench setup
Power a pneumatic test rig that needs a steady 0.6 MPa supply. The self-locking knob holds the setpoint despite nearby compressor vibration, and the gauge lets you verify pressure at a glance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK the Right Air-Prep Unit?
This GAFR300 size class suits 1/4in lines and weighs 500 g, so mount it on a panel or frame rather than supporting it from tubing. The metal bowl (C) is a build choice; common specs like 1.0 MPa max and -5 to 70 C are identical across PC, nylon, and metal, so confirm compatibility for aggressive surroundings. It ships with an automatic drain (A) for unattended or wet lines, and the no-bracket (J) option means you supply your own mounting. A circular gauge is fitted with an MPa/psi scale, matching the PT thread. The 40 um element is the standard grade; choose the 5 um (W) option for finer filtration. The reverse-flow (reflux) valve (K) is fitted as an ordering difference. If your line needs oil downstream, order the matching GAFC300-08 combination instead. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan a supply near 1.0 MPa for 0.9 MPa out.
Quick checklist
- ✓ Body size for your peak flow (1/4" 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 60 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 500 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 GAFC300-08 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ASJK FAQ
It is a filter & regulator with a 1/4in port, working pressure range 0.15-0.9 MPa (20-130 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 60 cc drain bowl, and 500 g weight. It has a 40 um element, automatic drain, metal bowl, and a fitted gauge with MPa/psi scale.
The K code indicates a reverse-flow (reflux) valve is fitted. It is listed as an ordering difference on the datasheet; its specific function is detailed in a separate catalogue page not included in our data. This model also has no mounting bracket (J) and an automatic drain (A).
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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