The AirTAC GFR30010LJC3T AirTAC Filter Regulator NPT3/8 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 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 GFR30010LJC3T is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air down to 40 um and regulates downstream pressure in the low-pressure type configuration. This unit has 3/8 in NPT female ports, a differential-pressure drain on the PC (polycarbonate) bowl, a round pressure gauge reading in bar, and no mounting bracket (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 available in sizes 200, 300, 400 and 600 with a choice of ports, threads (PT standard; G and NPT as order options), drain types, filter grades (40 um standard, 5 um with code W), gauge styles and scales, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet and flow figures for your application before ordering.
| Model | GFR30010LJC3T AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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 | 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. |
|---|---|
| 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. |
| (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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On an assembly fixture with air-actuated clamps, this unit filters the supply air to 40 um and holds the low regulated pressure the clamp cylinders are set up for, with the bar gauge giving the operator a direct reading at the station.
For pneumatic valve and damper actuators that run at reduced supply pressure, the low-pressure type regulator in this filter regulator conditions the air and sets the operating pressure, while the bowl's differential-pressure drain keeps condensate moving out during operation.
On a packaging line where cylinders and air jets need clean air at a moderate, stable pressure, this 3/8 in NPT filter regulator drops the line pressure to the machine's set point and strips water and particulate ahead of the directional valves.
Size 300 with 3/8 in NPT ports sits in the middle of the GFR range; step up to 400 or 600, or down to 200, as your line's flow demand dictates - we can check the flow curves against your consumption if you send the figures. The 40 um grade is the standard element; specify code W for the 5 um grade where finer particulate removal is needed. Drain is differential-pressure here (automatic and manual are the other catalogue choices), and this unit carries a round gauge scaled in bar; square embedded gauges and MPa/psi scales are the alternative. NPT is the thread option on this code, with PT as the standard thread and G (BSPP) also available. No bracket is fitted (code J); brackets are optional. The regulator is the low-pressure type - the exact adjustment range for this variant is not published, so confirm it with us. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GFR300 as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your line pressure and air consumption and we will confirm the flow figures from the datasheet against your application before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits regulated below the standard range; the exact adjustment range for this variant is not published, so confirm it with us for your set pressure. The C3 in the code means a round external gauge scaled in bar is fitted; square embedded gauges and MPa or psi scales are the other catalogue options.
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.