The AirTAC GFR300C08ALF2WK AirTAC Filter Regulator 1/4 in 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 GFR300C08ALF2WK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is a low-pressure type with a PT1/4 (1/4 in) port, a 5 um filter element (code W), an automatic drain on the metal bowl, an embedded square gauge with a psi scale, a reverse/check valve fitted, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The exact regulation range of the low-pressure type is not published in the standard tables and is confirmed on request.
This is a genuine AirTAC part. The GFR300 size family is one of four sizes (200/300/400/600) and is offered with a choice of port, thread (PT standard, with G and NPT as order options), drain type, filter grade (40 um standard, 5 um optional), gauge and scale, and check-valve or bracket options. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures for your application on request.
| Model | GFR300C08ALF2WK AirTAC Filter Regulator 1/4 in 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 carton-sealing or case-packing line, the low-pressure regulator holds a gentle clamping circuit at a reduced setting while the 5 um element and auto drain keep moisture and fines out of the clamp cylinders.
Diverter gates and reject pushers on a conveyor line often run below standard plant pressure; this filter regulator conditions the branch feed, the check valve holds the setting, and the automatic drain handles condensate.
A lab test bench drawing air for low-pressure fixtures gets filtered, regulated supply at the bench drop: the 5 um element protects sensitive tooling, and the psi-scaled square gauge gives a direct local reading.
Size and port: the GFR300 carries a 1/4 in PT port; step up to GFR400 or GFR600 (or down to GFR200) if your line needs a different port and flow capacity - we confirm sizing against the published curves before you order. Drain: this unit has an automatic drain, which suits unattended installations; manual and differential-pressure drains are the other decodable choices. Filter grade: this unit carries the 5 um element (code W) where finer particulate removal is needed; 40 um is the standard grade. Gauge: the embedded square gauge with psi scale is fitted here, with MPa or bar scales and an external round gauge available as options. Thread: PT is standard; G (BSPP) and NPT are order options. A mounting bracket is included, and the reverse/check valve is fitted on this code.
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 GFR300 as curves, not as a single rated figure, so we do not quote a l/min or SCFM number. Send us your application details and we will confirm the flow and the full datasheet figures for this exact model on request.
The W in the code sets the 5 um filter grade instead of the 40 um standard, for finer particulate removal, and the A sets an automatic drain that expels collected condensate without manual attention. Both choices are decodable options on the GFR300, and the regulation range of this low-pressure type is confirmed 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.