The AirTAC GFR30015LJF3T AirTAC Filter Regulator NPT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 40 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 GFR30015LJF3T is an AirTAC GFR-series filter regulator: a single body that removes water and particulate from compressed air and regulates downstream pressure. This 300-size unit has NPT1/2 ports, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough - no daily manual draining. It is the low-pressure type, intended for circuits that run at reduced settings, and it ships with the embedded square gauge on a bar scale so the set point can be read directly at the unit.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8" to 1" and PT, G and NPT thread options. Automatic and manual drain variants and a 5 um element are available in the family. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30015LJF3T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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 | 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. |
|---|---|
| 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. |
| (blank) | Filtering grade 40 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Clean, regulated supply air for the directional valves and clamping cylinders on a small stamping or forming press, with the low-pressure type matched to circuits that run at reduced settings.
Filter and regulate the air feeding sealing jaws, diverters and product-push cylinders on a packaging conveyor, with the square bar gauge letting operators verify the set point at the machine.
Point-of-use air preparation for a bench assembly cell with impact drivers and air cylinders, where the differential-pressure drain keeps condensate off the tools without daily attention.
Start with the port step: this unit is 300 size with 1/2" NPT ports, so match it to the air line feeding the machine section it serves. The 40 um element is the standard grade for general plant air; choose the 5 um (W) variant only where downstream equipment needs finer filtration. Drain choice matters: differential-pressure (this unit) drains itself with flow, automatic drains on a timer-free basis, and manual drain suits infrequently attended installations. Gauge scale is bar here; MPa and psi scales are order options, as is an external round gauge. NPT is this unit's thread; PT and G are the catalogue alternatives. Note the low-pressure type designation and confirm it matches your circuit's operating band. Bracket: this code is ordered without a mounting bracket.
Flow is published as curves, not a single rated figure, so we cannot quote a number here - send us your application's air demand 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. 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application's air demand and line conditions and we will confirm the sizing against the datasheet on request before you order.
This unit's drain is the differential-pressure type (the default, no drain letter in the code): condensate collected in the PC bowl is expelled automatically whenever the pressure drop across the 40 um element rises sufficiently, so it suits lines with regular air flow. Choose the automatic (A) or manual (M) drain variants instead for intermittently used or lightly loaded circuits.
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.