The AirTAC GFR30008LJC3WT AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR30008LJC3WT is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit is the low-pressure type, intended for circuits that run below standard line pressure. It carries a 1/4 in NPT port, a 5 um filter element, a differential-pressure drain, and a round pressure gauge reading in bar. The bowl is polycarbonate, which is the standard bowl material for the 300 size, and no mounting bracket is fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, a 40 um standard element or a 5 um element (code W), and gauge options. Flow is published as curves rather than a single rating, so ask us to confirm the sizing figures from the datasheet for your application before ordering.
| Model | GFR30008LJC3WT AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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 — round, 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". |
| (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). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| (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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a fixture line where clamps are specified to run below standard shop-air pressure, this low-pressure filter regulator cleans the supply and holds the reduced setting that the clamp cylinders were designed around.
Feeding the sealing-jaw cylinders and guide actuators on a packaging line, the unit strips water and fine particulate before the air reaches the valves, while the bar gauge gives the operator a visible line-pressure reference.
On a lab bench supplying low-pressure test rigs and pneumatic fixtures, the 5 um element protects sensitive instruments from condensate and particles, and the regulator sets the reduced pressure each rig requires.
Size the unit by port and required flow: this 300-size unit has a 1/4 in NPT port, and the larger 400 and 600 sizes move more air. The filter element here is 5 um (code W); the standard 40 um element suits applications that do not need finer filtration. Drain is differential-pressure; automatic and manual drains are order options. The fitted round gauge reads in bar, and square embedded gauges with MPa, psi or bar scales are available. Thread is NPT on this unit; PT is the standard thread and G (BSPP) is an order option. No mounting bracket is fitted, though brackets are optional. 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 this family as curves rather than a single rated figure, so no single number can be quoted here. Tell us your application and required flow, and we will confirm the sizing directly from the datasheet before you order.
The W code in GFR30008LJC3WT selects the optional 5 um element; the standard element is 40 um. Choose 5 um where downstream equipment such as instruments, valves or precision actuators needs finer filtration, and 40 um for general workshop air. Both grades are available across the GFR range.
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.