The AirTAC GFR30008MLJF3T AirTAC Filter Regulator NPT1/4 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008MLJF3T is a 300-size filter regulator that combines water and particulate filtration with downstream pressure regulation in a single body. This configuration has a 1/4 in NPT port, a 40 um standard filter element, a manual-drain polycarbonate bowl, and a low-pressure regulator type, so it suits circuits that need clean air held at modest working pressures rather than full-line pressure. The embedded square gauge is fitted with a bar scale for direct setting, no mounting bracket is included, and no reverse (check) valve is fitted.
This is a genuine AirTAC part from the GFR300 series. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options that include automatic or manual draining, a 5 um element (code W), different gauge scales, G or NPT threads, and brackets. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet details for your application before ordering.
| Model | GFR30008MLJF3T AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Clean, regulated air at a modest set pressure feeding clamp cylinders on a CNC fixture, where the operator checks the bar-scale gauge at setup and drains the bowl during shift checks.
Point-of-use air preparation for small cylinders and actuators on a packaging line, with the 40 um element catching water and pipe scale before they reach the valves.
A laboratory or QA test station needing filtered air held at a low, stable pressure, where the low-pressure regulator type and manual drain suit intermittent, attended operation.
Size and port: the 300 size with a 1/4 in NPT port sits in the middle of the GFR range; step up to 400 or 600, or down to 200, if your line size or air demand differs - we can check the published flow curves against your consumption before you commit. Drain: this unit has a manual drain, so someone opens the bowl drain periodically; choose the automatic-drain variant if the unit will sit where routine draining is impractical. Filter grade: 40 um is standard here; specify code W for the 5 um element if downstream equipment needs finer filtration. Gauge: the fitted square gauge reads in bar; MPa and psi scales are available as options, and an external round gauge can be substituted. Thread: this version is NPT; PT is the standard thread and G (BSPP) is also an order option. No bracket is included with this code.
Two honest notes on selection: this is the low-pressure regulator type, and the exact regulation range for that type is not published in our data, so confirm the set pressure you need with us before ordering. 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. 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 series as curves, not as a single rated figure, so there is no one number we can quote. Send us your line pressure and air consumption and we will confirm the flow from the datasheet curves on request.
The M in the code selects a manual drain: the bowl drain is opened by hand at intervals to expel collected water. If the unit will be mounted where routine draining is awkward, the same family offers automatic and differential-pressure drain variants - tell us the installation and we will confirm the right option.
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.