The AirTAC GFR400-10LJC3TK AirTAC Filter Regulator, NPT 3/8 in 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 GFR400-10LJC3TK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is fitted with 3/8 in NPT ports. It is the low-pressure (L) type, so it is intended for circuits that run below standard working pressure; the exact regulation range for the low-pressure type is not published, and we confirm it from the datasheet on request. Filtration is the standard 40 um grade, condensate is removed through the differential-pressure drain, and the fitted round gauge reads in bar. A reverse/check valve is fitted, and this configuration comes without a mounting bracket.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um (W) filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures for your application on request.
| Model | GFR400-10LJC3TK AirTAC Filter Regulator, NPT 3/8 in |
|---|---|
| Series | GFR400 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 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 | GFR400 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
On a fixture-clamping manifold that runs below standard line pressure, the low-pressure type regulator holds the reduced setting while the 40 um element keeps water and swarf out of the clamp cylinders and valves.
Feeding the cylinder bank on a carton-forming or case-sealing conveyor, the unit filters the shop air and regulates it to the pressure the machine builder specified, with the bar gauge giving the operator a clear local reading.
On automated process valves that must not see full line pressure, the filter regulator conditions the actuator supply, the reverse/check valve holds the downstream circuit if upstream pressure is lost, and the differential-pressure drain clears condensate during normal flow.
Choose the size and port step against the air demand of the circuit: this unit is size 400 with 3/8 in NPT ports, and the family steps through 200/300/400/600 as flow rises. Drain type is a real choice: differential-pressure (this unit), automatic, or manual. Filter grade is 40 um standard here, with 5 um (code W) available where finer filtration is needed. Gauge options are the embedded square type or an external round gauge, scaled in MPa, psi or bar - this unit carries a round bar gauge. Thread is PT as the catalogue standard with G and NPT as order options; this unit is NPT. Brackets are optional - this configuration has none. 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. 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 flow number. Tell us your application and we will confirm the flow and datasheet figures for this 3/8 in, 400-size unit on request before you order.
The L code marks this as the low-pressure regulator type, intended for circuits that run below standard working pressure. The exact regulation range for the low-pressure type is not published in the material we transcribe, so we confirm the range from the datasheet on request. The unit also carries a round gauge scaled in bar, a differential-pressure drain, 40 um filtration, a fitted reverse/check valve, and no mounting bracket.
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.