The AirTAC GFR400-15LJC2K 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 GFR400-15LJC2K is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a PT1/2 port with PT thread, the low-pressure regulator type, a differential-pressure drain on the bowl, the standard 40 um filter element, an external round gauge with psi scale, and a built-in reverse/check valve; no mounting bracket is included. Maximum working (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 from the GFR series, which spans sizes 200, 300, 400 and 600 with port options, drain types, filter grades, gauge styles and scales. Because rated flow is published as curves rather than a single figure, we confirm the datasheet and flow figures for your application on request.
| Model | GFR400-15LJC2K 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 | 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. |
| 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. |
| 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 that clamps workpieces at reduced air pressure, this filter regulator cleans the supply of water and swarf-laden condensate, holds a stable low setpoint, and its check valve holds the downstream circuit if upstream pressure dips.
Feeding cylinders and actuators on a packaging line, this 1/2 in unit drops line pressure to the machine's working band, strips bulk water and 40 um particulate, and the differential-pressure drain clears accumulated condensate without a manual walk-round.
In a plant air distribution panel, this filter regulator conditions the branch feeding valves and air-operated instruments, with the round psi gauge giving a local pressure readout and the check valve preventing backflow into the branch.
Start with the size and port: 400 is the larger step in the GFR range, and this unit takes a 1/2 in PT1/2 connection - match it to your line size and expected air demand, then let us confirm the flow curve against your application before ordering. Drain choice matters: differential-pressure (this unit) drains as the pressure differential builds, while automatic and manual variants are available on other codes. Filter grade is 40 um standard; a 5 um element is available under code W if finer filtration is needed. This code specifies the low-pressure regulator type - its exact adjustment range is not published, so confirm it with us. Gauge options are the embedded square gauge or an external round gauge, with MPa, psi or bar scales; this unit has the round gauge in psi. Thread is PT as standard, with G (BSPP) and NPT available to order, and a mounting bracket can be added on codes without the J suffix.
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 rather than a single rated figure, so we do not quote a number that could mislead your sizing. Tell us your line pressure, setpoint and air demand and we will confirm the flow figures from the datasheet for this exact configuration on request.
The L in the code marks the low-pressure regulator type, intended for applications where the working pressure sits below the standard type's range; the exact adjustment range for this variant is not published, so confirm it with us before ordering. Drainage on this unit is differential-pressure: condensate is discharged from the PC bowl automatically as the pressure differential builds, with no manual draining required.
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.