The AirTAC Airtac GAFR Filter & Regulators GAFR300C08ST 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.
The AirTAC GAFR300C08ST is a filter and regulator built into a single 1/4in-port body: incoming air first spins through a diversion stage that drops liquid water and solid particles into the bowl, then a balanced regulator locks in a steady outlet pressure between 0.15 and 0.9 MPa (20-130 psi). One casting does the work of a separate filter plus a separate regulator, so there are fewer joints to seal, and there is no lubricator anywhere in the unit. The 40 um element is the standard grade for general plant air.
This version pairs the metal (C) bowl with both semi-auto and manual draining, so condensate collected in the 60 cc sump can leave partly on its own or be dumped by hand. At 500 g the unit should sit on the included mounting bracket or a panel rather than hang from its tubing. The fitted circular gauge reads in psi and bar to match the NPT threads, and the whole series is rated -5 to 70 C.
| Model | Airtac GAFR Filter & Regulators GAFR300C08ST |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| Bowl material | Metal |
| 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 | 60 cc |
| Bracket | Included |
| 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 psi / bar, set by the NPT thread code. This unit filters and regulates only; it does not add lubrication.
| 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". |
| (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). |
| (blank) | Mounting bracket included. |
| (blank) | Circular pressure gauge fitted. |
| (blank) | Filtering grade 40 µm. |
| T | NPT thread; gauge scale psi / bar. |
| (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 GAFC300-08 F.R.L. combination instead.
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) |
A packaging station running carton sealers or stretch wrappers can take filtered, regulated air straight from this 1/4in unit, with the 60 cc bowl catching the condensate that compressed-air lines push toward the bench.
Small diverters, pushers and stopper cylinders along a conveyor line need steady low-pressure air; the balanced regulator holds the setting while upstream supply fluctuates between stations.
A workshop air drop feeding hand tools and clamping jigs benefits from the 40 um element and the semi-auto plus manual drain pair, so daily bowl checks stay quick at the 500 g wall- or bracket-mounted unit.
Start with the port: 08 selects 1/4in on the GAFR300 body, a mid-series size whose flow curve is plotted to 3500 L/min at 0.7 MPa inlet; if the line draws more, the GAFR400 body is the next step, plotted to 7000 L/min at 0.7 MPa inlet. The metal bowl on this code is a build choice, and the same body can be ordered with a polycarbonate bowl (blank) or a nylon bowl (N) instead. On draining, this model carries the semi-auto plus manual pair, while the A code swaps in a fully automatic drain for unattended or wet lines. The S type regulates 0.15-0.9 MPa; the L type tops out at 0.4 MPa for circuits that will never need more. This code keeps the bracket and the gauge, but J deletes the bracket, N deletes the gauge (the 1/8in connection stays if you add one later), and W moves to a 5 um element for finer filtration. On threads, the T code here means NPT ports with a psi/bar gauge scale, G means G threads with a bar/MPa scale, and blank means PT with MPa/psi. If the circuit also needs oil mist downstream, order the matching GAFC300-08 combination instead of this part, and note that a K suffix would add a reverse-flow valve as an ordering option. One planning point before you buy: 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range.
Quick checklist
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.
It is a 1/4in-port filter & regulator on the GAFR300 body. Working range is 0.15-0.9 MPa (20-130 psi), maximum pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). Temperature rating is -5 to 70 C. The single drain bowl holds 60 cc, the unit weighs 500 g, the element is 40 um, and the metal bowl ships with semi-auto and manual draining. Its flow curve is plotted to 3500 L/min at 0.7 MPa inlet as a sizing envelope.
The thread code also fixes the gauge scale. T gives NPT threads and a gauge reading in psi and bar, which suits North American service crews; G would give G threads with a bar/MPa scale, and blank would give PT with MPa/psi. Picking the scale your operators actually read avoids conversion mistakes at the panel.
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