The AirTAC GFR30015LJF3WTK AirTAC Low-Pressure Filter Regulator NPT1/2 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 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body. This unit, GFR30015LJF3WTK, is the low-pressure (L) type in size 300 with 1/2 inch NPT ports. It carries a 5 um filter element (code W) instead of the 40 um standard, a differential-pressure drain on the polycarbonate bowl, an embedded square gauge scaled in bar, and a built-in reverse/check valve (code K). No mounting bracket is fitted (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is made in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, in PT, G (BSPP) or NPT thread, with 40 um standard or 5 um filtration, differential-pressure, automatic or manual drains, and MPa, psi or bar gauge scales. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR30015LJF3WTK AirTAC Low-Pressure Filter Regulator NPT1/2 |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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". |
| (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. |
| 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) |
Conditions and regulates the air feeding carton-sealing and case-packing cylinders along a packaging conveyor, with 5 um filtration protecting valve surfaces from particulate carryover.
Sits at the drop of a robotic pick-and-place cell to filter and hold a steady low supply pressure to the gripper circuit, with the check valve holding the set point if upstream supply dips.
Provides filtered, gently regulated air at a spray booth or coating line where low set points are required, with the bar-scale gauge giving the operator a clear local reading.
Choosing between sizes 200, 300, 400 and 600 is a step in port size and flow capacity; size 300 with NPT1/2 ports is the mid-range choice for 1/2 inch lines. For this unit the main decisions are already made in the code: 5 um filtration for cleaner air than the 40 um standard element, a differential-pressure drain, a bar-scale square gauge, the low-pressure regulator type, and a reverse/check valve. PT is the standard thread and G (BSPP) is an order alternative. Because flow is published as curves rather than a single rated figure, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves, not as a single rated number, so there is no honest one-line figure we can quote. Tell us your line pressure and the air demand of the equipment downstream, and we will confirm the sizing against the datasheet on request before you order.
It marks the low-pressure regulator type. This unit regulates at lower set points than the standard GFR300 version; the exact adjustment range for the L type is not published in the catalogue, so ask us to confirm it for your set point. The rest of the code reads: 300 size with NPT1/2 ports, no bracket, square bar gauge, 5 um element, NPT thread, and a fitted reverse/check valve.
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.