The AirTAC GFR30008LJF2K AirTAC Filter Regulator PT1/4 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 PT1/4" 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 GFR30008LJF2K is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has PT1/4 ports, the standard 40 um filtration grade, a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element is high enough, a low-pressure regulator type for circuits that run at reduced set pressures, an embedded square gauge reading in psi, and a built-in reverse (check) valve that holds downstream pressure if the supply is interrupted. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part in the GFR300 series, one size within a family that spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 inch, PT, G or NPT threads, manual, automatic or differential-pressure drains, a 5 um fine-filtration option, and MPa, psi or bar gauge scales. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR30008LJF2K AirTAC Filter Regulator PT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 08 | Port size PT1/4". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a machining cell where pneumatic clamps and swing cylinders are specified to run at reduced set pressures, this low-pressure-type filter regulator cleans the shop air and holds the reduced circuit pressure, with the check valve keeping clamps seated if the main supply drops.
Feeding air cylinders and actuated guides on a packaging conveyor, the unit strips water and pipe scale from the plant supply at 1/4-inch take-off while the differential-pressure drain clears condensate without stopping the line.
For benchtop analytical and laboratory automation equipment that needs clean, reduced-pressure air, the 40 um element and psi square gauge give operators a visible, stable supply, and the PC bowl shows at a glance when condensate is collecting.
Size 300 with PT1/4 ports is the right step when your line runs at roughly 1/4-inch piping; step up to size 400/600 or down to size 200 if your flow demand differs - but because flow is published as curves rather than a single rating, let us confirm the fit against your application before you order. The differential-pressure drain on this unit suits a steady-duty installation where condensate should clear itself without operator attention; choose the automatic drain for intermittent duty or the manual drain where you want drain events fully controlled. The standard 40 um grade covers general plant air; specify the W code for 5 um if downstream equipment needs finer filtration. This unit is the low-pressure regulator type - confirm the set-pressure range with us before ordering. The psi square gauge is fitted as shown; external round gauges and MPa or bar scales are options, as are G or NPT threads in place of the PT standard. Note this J-coded unit comes without a mounting bracket - add one if the installation needs panel support.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application details and we will confirm the sizing against the datasheet curves on request before you order.
The K code means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply is interrupted. This unit also carries a differential-pressure drain (no drain letter in the code): condensate collected in the PC bowl is discharged automatically whenever the pressure drop across the filter element is high enough, with no manual draining needed.
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.