The AirTAC GFR30015LJC3TK 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 GFR30015LJC3TK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit has a 1/2 in NPT port and the L low-pressure regulator type. Filtration is the standard 40 um element, and the blank drain position gives the differential-pressure drain, the default drain configuration for this family. The bowl is polycarbonate (PC), so the condensate level is visible; only size 600 units use an aluminium alloy bowl. A round gauge with a bar scale is fitted, a reverse (check) valve is included, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR filter-regulator family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, thread options PT (standard), G and NPT, filter grades of 40 um standard or 5 um (code W), a choice of drains, gauge styles and scales, and bracket options. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR30015LJC3TK 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 — 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". |
| (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). |
| C | Gauge shape: Round. 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a robotic pick-and-place cell, this unit filters water and particles out of the supply to the gripper actuators and holds a steady low-pressure setting so parts are handled consistently cycle after cycle.
Feeding spray guns in a paint finishing booth, the 40 um element keeps moisture and debris out of the air stream while the low-pressure regulator lets the line be set to the gentle pressure the guns require.
On a bottling or cartoning line, this filter regulator supplies the diverter and pusher cylinders with clean, regulated air, and the fitted check valve holds the downstream circuit when the upstream supply is removed.
Every choice on this code is readable from the model itself. Size 300 with the 15 position sets a 1/2 in NPT port, so step up or down a size if your line or expected flow path needs a different connection. The L selects the low-pressure regulator type instead of the standard one; the exact adjustment range for the low-pressure type is not published, so confirm it with us before ordering. The blank drain position is the differential-pressure drain (automatic is code A, manual is code M). The blank filter-grade position is the 40 um element; choose W for the 5 um grade if finer filtration is needed. C3 fits the round gauge with a bar scale (square embedded gauge is standard; MPa and psi scales are alternatives). T selects the NPT thread option - PT is the standard thread, with G and NPT as catalogue options to order. J omits the mounting bracket, and K adds the reverse/check valve. Because flow for this family is published as curves and not as 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Send us your line size, downstream demand and operating pressure, and we will confirm the flow curve and check that size 300 with the 1/2 in port is correctly sized for your application, on request.
The L selects the low-pressure regulator type instead of the standard type, for circuits that need a lower setting range. The exact adjustment range for the low-pressure type is not published in the material we hold, so we confirm it on request. The rest of the code decodes normally: 40 um filtration, differential-pressure drain, round gauge with bar scale, NPT thread, no bracket, and a reverse/check valve fitted.
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.