The AirTAC GFR300C08AJF2GK AirTAC Filter Regulator G1/4, Auto Drain is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300C08AJF2GK is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is built with a G1/4 (1/4 inch) port, an automatic drain that ejects collected condensate without anyone opening the bowl, a 40 um standard filter element, an embedded square gauge reading in psi, and a reverse (check) valve. No mounting bracket is included with this code.
It is a genuine AirTAC part from the GFR300 size, one of four sizes (200, 300, 400, 600) that step up in port and flow capacity. Maximum inlet pressure is 1.0 MPa (145 psi), the regulating range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing). AirTAC publishes flow for this series as curves rather than a single rated figure; ask us to confirm the datasheet and sizing figures for your application.
| Model | GFR300C08AJF2GK AirTAC Filter Regulator G1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C0 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Feeding filtered, regulated air to pneumatic clamps and tool changers on a CNC cell: the 40 um element catches pipe scale and condensate water before they reach the clamp cylinders, and the regulator holds the clamping pressure the fixture was designed around.
Point-of-use air preparation for carton sealers and diverter gates on a packaging line. The automatic drain clears condensate continuously on a line that runs all shift, so the cylinders are not cycling on water-laden air.
Regulated air for a lab test bench or calibration rig where instruments need a stable, repeatable pressure: the psi-scale square gauge gives a direct readout in the units the test procedure specifies, and a reverse valve is fitted in this configuration.
Choose the GFR size by the port your air line already uses: this unit sits at G1/4 (1/4 inch) within a 200-600 range that runs up to 1 inch. Drain type is a real decision: automatic (this unit) discharges condensate on its own, manual needs an operator, and differential-pressure drains only when the pressure drop warrants it. Filter grade is the 40 um standard here, with a 5 um element available as code W. The square gauge is fitted with a psi scale; MPa and bar scales and an external round gauge are order options. Thread is G here, with PT as the standard and NPT available to order, and a bracket can be added if the unit will be mounted away from the air preparation assembly.
Flow for this series is published as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated number, so there is no one figure we can quote here. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
This unit carries code A, the automatic drain, which discharges collected condensate without anyone opening the bowl - useful on lines that run unattended. Manual and differential-pressure drains are catalogue alternatives on the GFR family, selected by changing the drain letter in the model code.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.