The AirTAC GFR400-15LJC3TK 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 GFR400-15LJC3TK is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is built with 1/2 in NPT ports, is the low-pressure regulator type, and carries the standard 40 um filter element with a differential-pressure drain. A round gauge scaled in bar is fitted, a reverse/check valve is included, and no mounting bracket is supplied. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part in the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 in and PT, G or NPT threads. Drain type, filter grade, gauge style and scale, bracket and reverse valve are all selectable across the series. Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR400-15LJC3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
On a CNC fixture line, this unit filters water and chips-laden condensate out of the supply and holds a low regulated pressure on the clamping cylinders, with the fitted check valve helping hold the set pressure if the upstream supply dips.
On a carton-forming and sealing conveyor, the GFR400-15LJC3TK conditions the air feeding sealing jaws and diverters, keeping moisture and particulate out of the actuators while the round bar gauge lets operators see the regulated line at a glance.
Feeding positioners and pilot valves on a process skid, this unit supplies clean, moisture-reduced air at a low regulated pressure, with the differential-pressure drain bleeding accumulated water from the PC bowl during normal flow.
The real choices on this family are the size and port (200 to 600, 1/8 to 1 in), matched to the flow your line needs; the drain type (differential-pressure as here, automatic, or manual); the filter element (40 um standard, 5 um with code W); the gauge (embedded square as standard or external round, scaled in MPa, psi or bar); the thread (PT as the standard, G or NPT to order); and the bracket or reverse valve. This unit is the low-pressure regulator type, so tell us your working pressure and we will confirm suitability. Because flow is published as curves rather than a single rating, ask us to check 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 GFR400 as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure, downstream demand and allowed pressure drop, and we will confirm the sizing from the datasheet on request.
The L marks the low-pressure regulator variant, intended for circuits regulated well below the standard setting range. The exact adjustment range for this variant is not published in the material we hold, so we confirm it on request. Maximum inlet pressure remains 1.0 MPa (145 psi) and the temperature range is -5 to 70 C.
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.