The AirTAC GFR400-15LJC2 AirTAC Filter Regulator PT1/2 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 AirTAC GFR400-15LJC2 is a low-pressure filter regulator: one body removes water and particulate from compressed air and holds downstream pressure. This size-400 unit has a PT1/2 (1/2 in) port with PT thread, a 40 um standard filter element, a differential-pressure drain and a round gauge reading in psi. The polycarbonate bowl shows condensate at a glance; max inlet pressure is 1.0 MPa (145 psi), operating temperature is -5 to 70 C (non-freezing), and no mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, a 5 um (W) element option, gauge styles and MPa/psi/bar scales, and G (BSPP) or NPT thread options to order. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15LJC2 AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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, psi 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.
| 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 | GFR400 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Air preparation for workholding clamps on a machining centre where the clamping cylinders are held at a reduced pressure; the filter cleans the supply and the low-pressure regulator holds the setpoint in one body.
Filtered, regulated air for pick-and-place and carton-sealing cylinders on a packaging conveyor, with the round psi gauge giving operators a visible setpoint at the machine.
Point-of-use air prep for spray guns on a finishing line: 40 um particulate removal and a low regulated pressure matched to the gun, with the differential-pressure drain clearing collected condensate.
Size 400 with a PT1/2 port suits lines that need more capacity than a size 200 or 300 unit; step up or down by port and required flow. The L in this code marks the low-pressure regulator type, chosen where the downstream setpoint sits below what the standard type covers - tell us your setpoint and we will confirm suitability, since the exact low-pressure range is not published. The 40 um element is standard; specify the W code for 5 um filtration. The drain here is differential-pressure (the default); automatic (A) and manual (M) drains are available in the series. Thread is PT as standard, with G (BSPP) and NPT as order options, and a bracket can be added if needed. Flow is published as curves, not a single rating, so have us 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.
Flow for this unit is published as curves, not a single rated figure, so we do not quote a number here. Send us your line pressure, setpoint and expected air demand and we will confirm the datasheet curve and sizing for your application before you order.
The L marks the low-pressure regulator type, selected when the downstream setpoint sits below what the standard type covers. The exact range for the low-pressure type is not published in the catalogue, so tell us your setpoint and we will confirm suitability. The rest of the code decodes as: PT1/2 port, 40 um element, differential-pressure drain, round psi gauge, 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.