The AirTAC GFR30008LJF2WTK AirTAC Filter Regulator NPT1/4 5 um is a genuine G-series filter regulator: water separation, 5 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 GFR30008LJF2WTK is an AirTAC GFR300 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/4 in NPT ports, a 5 um filter element (code W), a differential-pressure drain in the bowl, the low-pressure regulator type, an embedded square gauge reading in psi, and a reverse/check valve fitted. No mounting bracket is included, so plan your mounting accordingly.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, thread options (PT standard, with G and NPT as order options), drain types, 40 um or 5 um filtration, and gauge styles and scales. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR30008LJF2WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a fixture that clamps workpieces with air cylinders running at reduced pressure, this unit filters the shop air to 5 um and holds a steady low setpoint, while the check valve keeps the clamp from venting if the main supply drops.
Feeding blowoff nozzles that clear dust and droplets from bottles on a conveyor, the unit strips water and fine particles before the nozzles and lets an operator set a gentle, stable blowing pressure on the psi gauge.
Supplying purge and actuation air inside an analyser cabinet, the 5 um element protects sensitive pneumatic components, the low-pressure regulation suits delicate instruments, and the differential-pressure drain removes collected condensate without opening the bowl.
Start with the port size: this unit is a size 300 with 1/4 in NPT threads, one step in the 200/300/400/600 range where larger sizes carry larger ports and more flow. If your line may grow, stepping up a size now avoids re-piping later. Filtration here is the 5 um element (code W) instead of the 40 um standard, which suits finer downstream needs; the bowl drains by differential pressure, with automatic and manual drain versions available elsewhere in the family. The gauge is the embedded square type on a psi scale, with MPa and bar scales and an external round gauge as options, and the fitted check valve holds downstream pressure if upstream supply is lost. Thread is NPT here; PT is the catalogue standard and G is also orderable. As a low-pressure type, its regulation range differs from the standard version and the exact figure is not published, so confirm it with us. Flow is published as curves, not a single rating, so 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. The reflux valve permits reverse flow 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 we do not quote a rated flow number. Tell us your application and we will confirm the flow curve and sizing from the datasheet on request.
W is the 5 um filter element (the standard element is 40 um), and K means a reverse/check valve is fitted so downstream pressure is held if the upstream supply is lost. The J code means no mounting bracket is included with this unit.
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.