The AirTAC AirTAC GFR300C08LJF2WK Filter Regulator 1/4 in PT 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 GFR300C08LJF2WK is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration connects to a 1/4 in PT port, carries the finer 5 um filter element, drains its bowl by differential pressure, and is the low-pressure type of the GFR300. A square pressure gauge with a psi scale is fitted, a reverse/check valve is included, and the unit comes without a mounting bracket.
It is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual draining, 40 um or 5 um filtration, standard or low-pressure regulation, gauge scales in MPa, psi or bar, and PT, G or NPT threads. Max 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 rated figure, so ask us to confirm sizing and datasheet figures for your application.
| Model | AirTAC GFR300C08LJF2WK Filter Regulator 1/4 in PT |
|---|---|
| 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) |
Filtering and regulating the air that drives grippers and cylinders on a carton-forming packaging line, with the 5 um element protecting directional valves from particulate.
The low-pressure regulator type suits a blow-off or air knife station on a drying conveyor, where setpoints sit below the range of a standard regulator.
Conditioning air for pneumatic diverters and stop gates on a bottling conveyor; the fitted check valve blocks backflow toward the regulator if the upstream supply dips.
Size and port: the 300 size steps up from the 200 series with a larger port and more flow; this unit is made for a 1/4 in PT connection, and G (BSPP) or NPT threads can be ordered instead. Filtration: the fitted 5 um element suits air feeding sensitive valves and instruments, while the 40 um standard grade is the economical choice for general shop air. Regulation: this is the low-pressure type, intended where setpoints sit below the standard regulator's range - the exact adjustment range is not published, so confirm it with us. The embedded square gauge reads in psi; an external round gauge is optional, and a mounting bracket can be added if panel or wall fixing is needed. Because flow is published as curves rather than a single rating, ask us to check the curve against your air demand 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, not as a single rated figure, so we do not quote a number here. Send us your line pressure, set pressure and air demand, and we will confirm the sizing from the datasheet before you order.
K means a reverse (check) valve is fitted, so air will not flow back through the unit toward the regulator side. It is an option on GFR units - order a code without K if backflow is not a concern in your circuit.
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.