The AirTAC GFR30010LJC3TK AirTAC Filter Regulator NPT3/8 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 PT3/8" 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 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This unit, GFR30010LJC3TK, is set up for 3/8 in NPT threads with a 40 um filter element and a differential-pressure drain. It is the low-pressure regulator type, carries a round pressure gauge reading in bar, and has a reverse (check) valve fitted; no mounting bracket is included. The polycarbonate bowl suits the 300 size, the 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 G-series filter regulator line spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options that include manual or automatic drains, a 5 um element (code W), G (BSPP) or NPT threads, different gauge scales, and bracket or no-bracket mounting. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR30010LJC3TK AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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. |
|---|---|
| 10 | Port size PT3/8". 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a furniture-finishing spray line, the unit filters shop air to 40 um and holds a reduced, low-pressure supply to the spray guns, with the bar-scale round gauge letting operators read and repeat the setpoint between shifts.
Feeding pneumatic cylinders and grippers on a bottling conveyor, the GFR30010LJC3TK cleans the compressed air and regulates it at low pressure, while the fitted reverse valve blocks backflow toward the upstream supply side.
On a CNC clamping fixture run at low pressure, the filter section strips water and pipe scale before the regulator, and the check valve plus bar gauge keep the clamping circuit under visible, repeatable control.
The real choices on this series: step size and port (200/300/400/600, 1/8 to 1 in) against the flow your line needs; drain type - differential-pressure (this unit), automatic (A) or manual (M); filter grade 40 um standard or 5 um with code W; gauge style and scale (MPa, psi or bar - this unit reads bar on a round gauge); thread, with PT as the standard and G (BSPP) or NPT as order options; and bracket or no-bracket (J) mounting. 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 this series as curves, not as a single rated figure, so we do not quote a number here. Tell us your required flow and working pressure and we will confirm from the datasheet whether the GFR300 at NPT3/8 is correctly sized before you order.
L marks the low-pressure regulator type. The exact adjustment range for this variant is not published in our datasheet extract, so please confirm your setpoint with us. The rest of the decode is fixed by the code: differential-pressure drain, 40 um element, round bar-scale gauge, reverse valve fitted, no bracket, NPT3/8 port.
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.