The AirTAC GFR300C08ALJF2K AirTAC Filter Regulator PT1/4 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 GFR300C08ALJF2K is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This unit is built on the GFR300 size with a PT1/4 (1/4 in) PT port and is the low-pressure (L) regulator type. Condensate is discharged by the automatic drain (code A) without anyone opening the bowl, filtration is the standard 40 um element, and the metal bowl collects the separated water. An embedded square gauge with a psi scale shows the downstream setting, a reverse/check valve (code K) is fitted, and no mounting bracket is included with this configuration. 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 family spans four sizes (200, 300, 400 and 600) with port sizes from 1/8 in to 1 in, and options that include automatic, manual or differential-pressure drains, a 5 um (W) filter element, square or external round gauges with MPa, psi or bar scales, G (BSPP) or NPT threads, and brackets. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm flow and datasheet figures for your application on request.
| Model | GFR300C08ALJF2K AirTAC Filter Regulator PT1/4 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) |
Feeding pick-and-place cylinders and clamp actuators on a packaging line that runs in a reduced pressure band, where the low-pressure regulator type matches the circuit and the automatic drain keeps condensate out of the downstream valves.
Supplying instruments and pneumatic test fixtures with air that has water and 40 um particulate removed and a downstream pressure shown on the psi gauge, with the fitted reverse/check valve adding backflow protection for the circuit.
Regulating the air to gate and diverter cylinders that sort product on a conveyor line, with the automatic drain and metal bowl handling condensate from a humid compressor room so water never reaches the solenoid valves.
Choices that matter on this family: step up or down the size (200/300/400/600) to match the port and flow path your line needs - here that is GFR300 with a PT1/4 port. Drain type is a real decision: automatic (this unit, code A) discharges condensate on its own, manual (M) needs a routine drain, and differential-pressure (blank) is the default. Filter grade is 40 um standard or 5 um with code W for finer particulate. Gauges are embedded square as standard with MPa, psi or bar scales, and an external round gauge is optional; thread is PT as standard with G (BSPP) and NPT as order options; brackets are optional (this configuration has none); and the low-pressure (L) or standard regulator type is chosen at order time. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for the GFR300C08ALJF2K on request.
This unit carries code A, the automatic drain, which discharges collected condensate without anyone opening the bowl - useful on lines that are not visited daily. The same GFR300 body is available with a manual drain (M) or the differential-pressure drain (blank code). Note that this is the low-pressure (L) regulator type and its exact adjustment range is not published in our data, so we confirm it on request.
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.