The AirTAC GFR300C08ALJC2W AirTAC Filter Regulator 1/4 in PT 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 GFR300C08ALJC2W is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This 300-size configuration has a 1/4 in PT port, an automatic drain that clears collected condensate from the metal bowl without manual attention, and a 5 um filter element (code W) for finer capture than the 40 um standard. It is the low-pressure regulator type, fitted with a round pressure gauge reading in psi; no reverse/check valve is included and no mounting bracket is supplied. 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 from the G-series air-treatment line, which covers sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and PT, G or NPT threads to order. Flow is published as curves rather than a single rating, so ask us to confirm sizing and full datasheet figures against your application.
| Model | GFR300C08ALJC2W AirTAC Filter Regulator 1/4 in PT 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) |
Filtered, regulated air for the clamping cylinders and tool-change actuators on a CNC machining centre, with the 5 um element protecting fine pilot valves.
Steady regulated pressure to the diverter-gate cylinders on a parcel-sorting conveyor, with the automatic drain handling condensate between shifts.
Clean, regulated air to spray guns in a paint booth, where the 5 um grade supports finish quality and the psi gauge lets operators set and check line pressure.
Size and port set the flow capacity: 300 is the mid-range G-series frame, here on a 1/4 in PT port, with G or NPT threads available to order. Pick the 5 um element (this code) where downstream equipment needs finer protection, or the 40 um standard where coarser filtration is enough. The automatic drain suits installations that are not checked daily; manual and differential-pressure drain versions exist in the same series. The round psi gauge can be specified with a square gauge or MPa/bar scales instead, and a mounting bracket can be ordered if you would rather not rely on piping for support. Because flow is published as curves, not a single rating, 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, not as a single rated figure, so no one number is quoted here. Send us your application details and we will confirm the flow and full datasheet figures for this exact model on request.
The W code on this model specifies the 5 um filter element, which captures finer particulate than the 40 um standard and suits circuits with sensitive valves or finishing equipment. The 40 um grade remains available in the same series if coarser protection is sufficient.
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.