The AirTAC GFR40015LJF2W AirTAC Filter Regulator PT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 5 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 GFR40015LJF2W is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single size 400 body with a PT1/2 port. It removes water and particulate from compressed air through a fine 5 um element (code W, against the 40 um standard) and regulates downstream pressure in the low-pressure configuration. The differential-pressure drain bleeds collected condensate automatically whenever the pressure differential across the bowl is sufficient, so no manual draining routine is needed. A square gauge is fitted as standard and reads in psi, and this unit ships without a mounting bracket and without a reverse/check valve.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with matching port sizes, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR40015LJF2W AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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 — square, 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Fixture clamps and swing cylinders that hold workpieces at reduced regulated pressure get clean, moisture-filtered air from the 5 um element while the low-pressure regulator holds the clamping setting steady across the shift.
At the point where the plant air drops to a packaging or cartoning machine, this unit filters water and fine particulate out of the supply and regulates it down for the machine's cylinders and actuators, with the psi gauge giving operators a local reading.
Analytical instruments, pneumatic lab benches and pilot-scale rigs that need fine-filtered air at a gentle, stable pressure take it from this low-pressure filter regulator, with the differential-pressure drain keeping the bowl clear without daily attention.
Start with the port step: size 400 with a PT1/2 port sits in the upper half of the GFR range, so match it to your line size and let us confirm the flow curve covers your demand. This code specifies the low-pressure regulator type (L); if your circuit runs at ordinary shop-air pressures, the standard type may be the better fit, and we can confirm the low-pressure adjustment range from the datasheet on request. The 5 um element (W) suits air motors, valves and instruments that need finer filtration than the 40 um standard. Drain is differential-pressure here; choose automatic (A) for unattended sites or manual (M) where you want a deliberate drain action. The fitted square gauge reads in psi (scale 2); MPa and bar scales and an external round gauge are alternatives. Thread is PT as standard, with G and NPT available to order, and a mounting bracket can be added if this one is omitted. Because flow is published as curves rather than a single rating, 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 GFR series as curves, not as a single rated number, so we do not quote a figure here. Tell us your line size and air demand and we will confirm from the datasheet whether the size 400, PT1/2 flow curve covers your application before you order.
L marks the low-pressure regulator type, intended for circuits that run at reduced downstream pressures rather than the standard full-range setting. The exact adjustment range for the low-pressure type is not listed on our sheet, so we confirm it from the AirTAC datasheet on request. Everything else in the code decodes normally: 5 um filtration (W), a psi square gauge (F2), differential-pressure drain, no bracket (J) and a PT1/2 PT-thread port.
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.