The AirTAC GFR30008LJF1T AirTAC Filter Regulator NPT1/4 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 GFR30008LJF1T is a GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single 300-size body with a 1/4 in NPT port. This configuration is the low-pressure regulator type, fitted with the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, an embedded square pressure gauge reading in MPa, and no mounting bracket. The polycarbonate bowl lets you see the condensate level at a glance, and the maximum working (inlet) pressure is 1.0 MPa (145 psi) with an operating temperature range of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um or 5 um (W) filtration, manual (M) or automatic (A) drains alongside the differential-pressure default, optional reverse/check valve (K), and PT, G or NPT threads (PT is the standard; NPT on this model is a catalogue order option). Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR30008LJF1T AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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". |
| (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. |
| 1 | Gauge scale: MPa. 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) |
Filtered, regulated air set to a low holding pressure keeps workpiece clamps on a CNC fixture firm without over-stressing the part; the square MPa gauge gives the operator a direct set-point readout at the fixture.
A process skid that runs instruments and small actuators on gently regulated air gets clean, moisture-reduced supply from the 40 um element and differential drain, with regulation held steady at low set pressures.
Stopper, pusher and gate cylinders on a packaging conveyor line need filtered air regulated to a low, gentle setting so products are stopped without impact; this unit filters and regulates in one body at the line drop.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow path your line needs; this unit is the 300 size with a 1/4 in NPT port. Choose the 40 um standard element for general plant air, or the 5 um (W) grade where finer particulate removal matters. Drain options are differential-pressure (this model, self-acting with flow), automatic (A) for continuous unattended condensate removal, or manual (M) where you want a deliberate drain point. The embedded square gauge on this unit reads in MPa; external round gauges and psi or bar scales are available. Threads come as PT (standard), G or NPT, and a bracket can be added where panel or wall fixing is needed. Because flow is published as curves and not a single rated number, send us your application details and we will confirm sizing against the datasheet before you order.
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 GFR flow as performance curves rather than a single rated figure, so there is no one rated flow number we can quote. Tell us your line pressure, set pressure and the flow your application needs, and we will confirm the sizing against the catalogue curves and datasheet on request before you order.
The L code marks the low-pressure regulator variant of the GFR filter regulator, intended for applications where the regulated set pressure sits in the lower part of the range rather than the standard type. The exact adjustment range for this variant is not published in the material we hold, so please confirm the range with us against the datasheet before ordering if your set point is critical.
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.