The AirTAC GFR30015ALJC3WTK AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 AirTAC GFR30015ALJC3WTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is built with a 1/2 in NPT port, an automatic drain that clears collected condensate from the PC bowl without manual attention, and a fine 5 um filter element (the W grade) for cleaner air than the standard 40 um element. It is the low-pressure regulator type, fitted with a round pressure gauge reading in bar, and a reverse/check valve is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. No mounting bracket is supplied with this configuration.
This is a genuine AirTAC part in the GFR300 series, one of four sizes (200, 300, 400, 600) that step up in port size and body size. Across the GFR family you can order manual or differential-pressure drains, the 40 um standard element, square or round gauges with MPa, psi or bar scales, PT, G or NPT threads, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application on request.
| Model | GFR30015ALJC3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Fitted — round, bar scale |
| 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. |
| (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. |
| 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) |
On an assembly fixture that clamps with air cylinders running at reduced pressure, this unit filters the supply to 5 um and holds the regulated setting, with the automatic drain keeping condensate out of the valves between cycles.
Filling and carton-sealing machines run many small cylinders and air jets off one drop; a 1/2 in filter regulator at the machine inlet cleans the air, protects the directional valves from water and debris, and lets the setter read line pressure on the bar gauge.
Test rigs and lab equipment with sensitive pneumatic instruments benefit from the 5 um element and stable low-pressure regulation; the reverse/check valve holds the setting if the supply is interrupted, and the automatic drain suits an unattended bench.
Choose the size and port step against the air demand of your circuit: this unit is size 300 with a 1/2 in NPT port; smaller or larger GFR sizes move down or up from there. Drain type is a real choice - automatic (as fitted here) for unattended condensate removal, manual where you prefer operator control, or the differential-pressure default. Filter grade is 40 um standard or 5 um (code W) as on this unit, so pick the finer element only where the downstream equipment needs it. Gauge options are the embedded square gauge or an external round gauge, with MPa, psi or bar scales - this configuration carries a round gauge on bar. Thread is PT as standard, with G (BSPP) and NPT as order options; this unit is NPT. Brackets are optional on GFR, and this one is ordered without a bracket.
One honest routing note: AirTAC publishes flow for this family as curves, not as a single rated number, so send us your flow and pressure requirements 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. The reflux valve permits reverse flow 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 there is no one l/min or SCFM number we can honestly quote. Tell us your required flow and upstream pressure and we will confirm the sizing against the datasheet on request before you order.
The code decodes it that way: A is the automatic drain, which ejects collected condensate from the PC bowl without manual intervention; C is the external round gauge and scale 3 selects the bar reading. If you would rather have a manual drain, an MPa or psi scale, or the embedded square gauge, those are order options in the same 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.