The AirTAC GFR30008LJNWT 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 AirTAC GFR30008LJNWT is a GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the size-300 unit with 1/4 in NPT ports, a 5 um filter element (code W), a differential-pressure drain on the polycarbonate bowl, and the low-pressure (L) regulator type. Maximum inlet pressure is 1.0 MPa (145 psi), working temperature is -5 to 70 C (non-freezing), and no gauge or mounting bracket is fitted.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 to 1 in, and options for automatic or manual drains, the 40 um standard element, gauges with MPa, psi or bar scales, brackets, G or NPT threads and a reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30008LJNWT 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
Sits on the drop feeding spray guns in a finishing booth, stripping water and fine particles that spoil finishes while holding the lower gun pressure this low-pressure type is built for.
Conditions and regulates the small pilot line that actuates process valves on a skid, keeping moisture and debris out of the pilot ports.
Feeds the air cylinders on a carton or case packaging conveyor, giving the section a single point of water removal and pressure setting.
The real choices on this series are all decodable from the code: size and port (200/300/400/600, 1/8 to 1 in) stepped against the flow your line needs; drain type - differential-pressure as fitted here, automatic (A) or manual (M); filter element 40 um standard or 5 um (W, fitted here); gauge and scale, or none as on this unit (N); PT as the standard thread with G or NPT to order; bracket or none (J, none here). This is the low-pressure (L) type and its exact adjustment range is not published, so confirm your set pressure with us. Because flow is published as curves and not a single rated figure, send us your application and we will confirm sizing and datasheet numbers 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 flow for the GFR300 as curves, not as a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curve and check the sizing with you before you order.
It marks the low-pressure regulator type. The catalogue does not publish an exact adjustment range for this variant, so tell us your set pressure and we will confirm suitability. This unit also has no gauge (code N) and no bracket (code J); maximum inlet pressure is 1.0 MPa (145 psi) and the working range is -5 to 70 C.
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.