The AirTAC GFR30008ALJF3T 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 automatic 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 GFR30008ALJF3T is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body, for compressed air only. This 300-size unit is configured with a 1/4 in NPT port, an automatic drain that expels collected condensate without manual attention, the standard 40 um filter element, and the low-pressure regulator type. A square pressure gauge scaled in bar is fitted, and the unit is supplied without a mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi), with an operating temperature range of -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drains, a 5 um element option (code W), and gauge scales in MPa, psi or bar. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR30008ALJF3T AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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 | Automatic 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". |
| A | Drain: Automatic 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. |
| 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) |
On a fixture-clamping manifold that holds workpieces at a reduced air pressure, this filter regulator cleans the supply, drains condensate automatically and lets the operator set and read the clamping pressure on the bar gauge.
Feeding the air cylinders on a carton-sealing or wrapping machine, the unit removes water and particulate from the shop air and regulates the supply pressure at the machine, with the automatic drain keeping the bowl clear between shifts.
On a test bench or lab rig running instruments and small actuators from a shop-air drop, the low-pressure regulator type holds a reduced, stable setting while the 40 um element and automatic drain protect the downstream equipment.
Choose the size by the port step your air line needs: this unit is 300 size with a 1/4 in NPT port, and the family steps up through 400 and 600 for larger ports and higher flow. Because flow is published as curves and not as a single rated number, ask us to confirm sizing against your application before ordering. The automatic drain on this unit suits points where condensate should be removed without routine manual attention; manual and differential-pressure drain versions are available if you prefer a different service pattern. The 40 um element is the standard grade, with a 5 um element (code W) available where finer filtration is required. This is the low-pressure regulator type, so confirm the adjustment range for your setpoint on request. The fitted square gauge reads in bar; MPa and psi scales are the other published options. NPT is ordered as a thread option (PT is the catalogue standard), and a mounting bracket can be specified on versions that include one.
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 we do not quote a rated flow, Cv or l/min number for this unit. Tell us your application and line conditions and we will confirm the flow data from the datasheet on request, so you can size the 300-size, 1/4 in NPT unit against your requirement before ordering.
This unit carries drain code A: an automatic drain that discharges condensate collected in the polycarbonate bowl without anyone opening it, which suits installations that are not checked daily. The family also offers a manual drain (code M) and a differential-pressure drain (the default). All three are order choices on the same GFR300 filter regulator body.
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.