The AirTAC GFR300C08ALJC2TK AirTAC Filter Regulator NPT 1/4 in 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 GFR300C08ALJC2TK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure, in a single body. This unit is built for 1/4 in NPT ports in the GFR300 size, with an automatic drain that discharges condensate from the metal bowl without manual attention, a 40 um standard filter element, the low-pressure regulator variant, an external round gauge reading in psi, and a reverse/check valve fitted. No mounting bracket is included.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, square or round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet.
| Model | GFR300C08ALJC2TK AirTAC Filter Regulator NPT 1/4 in |
|---|---|
| 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) |
Filtered, low-pressure regulated air to spray guns and air-assisted applicators, with the automatic drain keeping condensate out of the finish line between shifts.
Steady low-pressure supply to sealing cylinders and vacuum generators on a packaging conveyor, with 40 um filtration protecting valve seats from water and debris.
Regulated air to pneumatic clamps on a machining fixture, where the reverse/check valve holds the circuit against supply loss and the psi gauge gives operators a local reading.
Choose the GFR300 size when your line runs 1/4 in ports and you want filtration and regulation in one body; larger sizes (400, 600) move more air at bigger ports, and the flow curves - not a single rating - decide the step, so send us your demand and we will confirm. Drain choice is real: this unit drains automatically, while manual and differential-pressure versions suit intermittent or monitored duty. Filtration is the 40 um standard element; specify W for the 5 um grade where finer protection matters. The gauge here is an external round type reading psi; embedded square gauges and MPa or bar scales are alternatives. PT is the standard thread and G or NPT are order options - this unit is built NPT. A mounting bracket is optional and this configuration comes without one; the low-pressure regulator variant is confirmed against your setting range on request.
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, not as a single rated figure, so we do not quote a number here. Send us your line pressure, port size and air demand and we will confirm the sizing from the datasheet before you order.
The A in the code sets an automatic drain, which discharges collected condensate from the bowl without anyone opening it - useful on lines that run unattended. The same GFR300 body is available with a manual drain or the differential-pressure default, and with a 5 um (W) element if you need finer filtration than the 40 um standard fitted here.
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.