The AirTAC GFR400-15LJC2WK AirTAC Filter Regulator PT1/2 5 um 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 GFR400-15LJC2WK is an AirTAC GFR-series filter regulator: water and particulate removal plus downstream pressure regulation combined in a single body. This size 400 unit has a PT1/2 (1/2 in) PT-thread port, a 5 um filter element (the finer of the two published grades), a differential-pressure drain that bleeds condensate as air flows through, a polycarbonate (PC) bowl, a fitted round gauge reading in psi, and a built-in check valve that holds downstream pressure when the upstream supply drops. It is the low-pressure (L) regulator type, rated for a maximum inlet pressure of 1.0 MPa (145 psi) and -5 to 70 C (non-freezing), and this J-coded build ships without a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, with a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, embedded square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15LJC2WK AirTAC Filter Regulator PT1/2 5 um |
|---|---|
| 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 — 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. |
| 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
On a woodworking or light-assembly line where actuators run well below full line pressure, the low-pressure regulator trims the supply to the working band while the 5 um element keeps debris out of the clamping valves.
Ahead of paint spray guns in a finishing booth, the filter section strips water and fine particulate so the finish stays clean, while the regulator holds a steady supply pressure at the gun.
The built-in check valve keeps a pneumatic manifold pressurised while the upstream compressor unloads or a branch is isolated, preventing backflow through the regulator.
Size 400 with a 1/2 in PT port suits circuits plumbed at that size; step up or down a size only with the flow curve in hand, since flow is published as curves rather than one rated figure - we will check the curve against your demand on request. This unit is the low-pressure (L) type; its exact regulation range is not published, so confirm your set pressure with us before ordering. The 5 um (W) element is the finer option versus the 40 um standard - choose it where downstream valves or instruments need cleaner air. The drain is the differential-pressure default; automatic (A) or manual (M) drains are orderable alternatives. The fitted round gauge reads in psi; embedded square gauges and MPa or bar scales are options. Thread is PT as standard, with G and NPT available to order, and a bracket can be specified if this no-bracket build needs one.
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 this family as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure and air demand and we will confirm the sizing from the datasheet curves on request.
L marks the low-pressure regulator type. The exact regulation range for this low-pressure version is not published, so tell us your set pressure and we will confirm suitability on request. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
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.