The AirTAC GFR300-15ALJNWTK AirTAC Filter Regulator 1/2 in NPT 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 PT1/2" 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 GFR300-15ALJNWTK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built around a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), and an automatic drain that expels collected condensate without manual attention. It is the low-pressure type, it comes without a gauge and without a mounting bracket, and a reverse/check valve is fitted to block reverse flow.
This is a genuine AirTAC part. GFR300 is the 300 size of the GFR filter-regulator family, which spans 200, 300, 400 and 600 sizes with a choice of PT, G or NPT thread, differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge options, and standard or low-pressure regulation. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because flow is published as curves rather than a single rating, we confirm flow and datasheet figures on request.
| Model | GFR300-15ALJNWTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Filtered, regulated low-pressure air to swing clamps and workholding fixtures, with the 5 um element keeping contamination out of the clamp circuit and the fitted reverse/check valve blocking reverse flow.
Clean, regulated air to carton sealers and label applicators on a packaging conveyor, where the automatic drain keeps condensate out of the air feeding cylinders and valves without operator attention.
A compact filter-regulator stage at the head of a control panel supplying positioners, I/P modules and small actuators, with the 1/2 in NPT connection matching the panel's main air inlet.
Choose the size and port against the air your circuit actually consumes: the 300 size with a 1/2 in NPT port sits mid-range in the GFR family, and the right step up or down depends on required flow, which the catalogue publishes as curves rather than a single rating - ask us to confirm sizing against your application before ordering. This unit is already fixed as low-pressure type, 5 um filtration, automatic drain, no gauge, no bracket, with a reverse/check valve fitted; if you need the 40 um element, a manual or differential-pressure drain, a square or round gauge, or a mounting bracket, those are separate order codes in the same series.
Thread here is NPT; PT is the standard thread and G (BSPP) is the alternative option to order. Maximum inlet pressure is 1.0 MPa (145 psi). The exact regulation range for the low-pressure type is not published as a single figure, so confirm your set pressure with us.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes G-series flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and the full datasheet figures for this model on request.
The gauge position in the code is N, so no gauge is supplied with this configuration. Gauge options - embedded square or external round, in MPa, psi or bar scales - are available on other order codes in the GFR300 series.
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.