The AirTAC GFR300C08ALJF2WGK AirTAC Filter Regulator G1/4, 5 um 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 GFR300C08ALJF2WGK is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built around a G1/4 (BSPP) port on the GFR300 size, with a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate without manual attention, and a metal bowl. The regulator is the low-pressure type, and an embedded square gauge reading in psi is fitted. A reverse/check valve is included, the unit comes without a mounting bracket (code J), and it is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans four sizes (200, 300, 400 and 600) with ports from 1/8 to 1 inch, and options across drain type, filter grade, gauge and scale, thread (PT standard, with G and NPT as catalogue options) and bracket. Flow for the G-series is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C08ALJF2WGK AirTAC Filter Regulator G1/4, 5 um |
|---|---|
| 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 carton-sealing and case-erector cylinders on a packaging line: the 5 um element protects directional valves from particulate, the automatic drain clears condensate through long runs, and the low-pressure regulator holds the gentle set pressure those actuators need.
Regulating clamp cylinders on a machining fixture that work below standard shop pressure: the low-pressure type suits reduced set points, and the fitted reverse/check valve helps hold the downstream setting when supply pressure dips between cycles.
Conditioning air on a laboratory or test bench where instruments and small actuators need clean, low-pressure air: fine 5 um filtration, a psi-reading square gauge for direct setting, and automatic drainage so the rig runs unattended.
The real, decodable choices on this family: size and port step (200/300/400/600 against the flow your line needs - here the GFR300 size with a G1/4 port); drain type - differential-pressure (default), automatic (this unit) or manual; filter grade - 40 um standard or 5 um with code W (this unit); gauge - embedded square as standard with MPa, psi or bar scales, or an external round gauge; thread - PT as standard, G (BSPP) or NPT as options; and bracket, which this unit omits (code J). The regulator here is the low-pressure type (code L) rather than the standard version. Flow for the G-series is published as curves, not a single rating, so please 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 G-series flow as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your application and we will confirm the flow and sizing from the datasheet on request.
The regulator fitted is AirTAC's low-pressure variant rather than the standard type, intended for reduced set pressures. The exact adjustment range for this variant is not published in the material we hold, so we confirm it on request. The rest of the code decodes as: G1/4 port, 5 um element, automatic drain, square psi gauge, check valve fitted, no bracket.
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.