The AirTAC GFR300C08ALJF2G AirTAC Filter Regulator G1/4 Low-Pressure 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 GFR300C08ALJF2G is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration has a G1/4 (1/4 in) port, a metal bowl with an automatic drain that clears collected condensate without manual attention, a 40 um standard filter element, and the low-pressure regulator type (its exact adjustment range is not published; we confirm it on request). An embedded square gauge reading in psi is fitted, and no mounting bracket or reverse/check valve is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, in PT, G (BSPP) or NPT thread, with manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge or no-gauge, and bracket options. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C08ALJF2G AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| 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) |
On a machining cell where swing clamps and hold-downs run at reduced set pressure, this unit filters the supply and holds the setpoint, with the psi gauge giving the operator a direct read.
Filling and cartoning machines with many small cylinders benefit from one body that removes condensate and particulate and regulates the supply, while the automatic drain keeps the bowl clear across shifts.
Bench-mounted nutrunners, air presses and pick-and-place stations can take this G1/4 filter regulator at the drop, protecting downstream valves and cylinders from water and debris.
The real choices within GFR300: port size (here G1/4) against the flow your line needs, stepping up to GFR400 or GFR600 for larger ports; drain type, where automatic (this unit) empties the bowl unattended while manual and differential-pressure drains suit other service routines; filter grade, 40 um standard here or 5 um with code W for finer protection; gauge scale, psi here with MPa or bar available; and thread, PT standard with G and NPT as order options. Brackets are optional and not fitted on this configuration. Flow is published as curves, not a single rating, so send us your application conditions 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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, set pressure and expected air demand and we will confirm the flow and sizing from the datasheet on request.
The automatic drain on this unit expels collected condensate without operator attention, which suits unattended or multi-shift service. The same GFR300 body is also available with a manual drain or a differential-pressure drain, and with a 5 um (W) element, other gauge scales, and PT or NPT thread as order options.
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.