The AirTAC GFR300C08ALJF2WK AirTAC Filter Regulator PT1/4, 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 GFR300C08ALJF2WK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point, in a single body. This size 300 unit is threaded PT1/4, carries a 5 um filter element (the finer of the two published grades), drains condensate automatically, and is the low-pressure regulator type. A square pressure gauge with a psi scale is fitted, a reverse/check valve is installed, and the unit is supplied without a mounting bracket. The polycarbonate bowl is standard for the 300 size, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating range of -5 to 70 C, non-freezing. The catalogue does not publish an exact adjustment range for the low-pressure type; we confirm it on request.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, offered with differential-pressure, automatic or manual drains, 40 um or 5 um elements, embedded square or optional external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08ALJF2WK AirTAC Filter Regulator PT1/4, 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) |
On a robotic pick-and-place cell, the low-pressure regulator holds a gentle, steady supply to the gripper circuit while the 5 um element and automatic drain keep water and fine particles out of the valves.
At a paint-spray booth, the unit filters the atomizing air to 5 um and lets the operator set a lower working pressure than the main line, with the automatic drain clearing condensate between shifts.
On a carton-sealing conveyor, the filter regulator supplies the seal-jaw cylinders at a reduced, repeatable setting, and the fitted reverse/check valve blocks backflow through the unit if the supply side drops.
For this model the choices are already fixed by the code: size 300 with a PT1/4 port, 5 um element, automatic drain, low-pressure type, square psi gauge, reverse/check valve fitted, no bracket. When selecting within the GFR family, step the size and port (200/300/400/600, 1/8 in to 1 in) against the flow your line needs; choose the drain (differential-pressure as the default, automatic for unattended condensate removal, manual where periodic draining suits the cell); pick 40 um for general air preparation or 5 um where finer filtration matters; set the gauge scale to MPa, psi or bar; and order G or NPT thread if PT does not match your pipework. Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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 rather than a single rated figure, so no rated flow number is quoted here. Send us your line pressure and required downstream flow and we will confirm sizing from the datasheet on request.
This unit is the low-pressure regulator variant, intended for circuits that run below the settings of a standard regulator. The catalogue does not publish an exact adjustment range for this variant, so we confirm the figures on request. The rest of the code decodes normally: PT1/4 port, 5 um element, automatic drain, square psi gauge, reverse/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.