The AirTAC GFR40015LJNWTK AirTAC Filter Regulator 1/2 in NPT 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 AirTAC GFR40015LJNWTK 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 1/2 in NPT port, the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate whenever the pressure differential across the element is high enough, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. It is the low-pressure (L) version, intended where the working pressure sits below the standard regulator band, and it is supplied without a gauge or mounting bracket.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, a choice of PT, G or NPT thread, manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge options and bracket options. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet numbers for your application before ordering.
| Model | GFR40015LJNWTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds the clamping and holding cylinders of a workholding fixture where the clamp pressure must sit in a low band; the fine 5 um element protects the directional valves and the check valve holds the clamp if the plant air drops.
Conditions the air feeding sealers, flap folders and diverters on a packaging conveyor, removing water and fine dust before the valves, with the differential-pressure drain keeping condensate under control between shift checks.
Supplies filtered, regulated air to positioners, pilot valves and small actuators on a skid-built process line, where the 5 um grade and a stable low setpoint keep the control components working reliably.
Size 400 with a 1/2 in port sits in the upper-middle of the GFR range, so step up to size 600 or down to size 300 depending on the air demand of the line - we can check the published flow curves against your consumption if you send the figures. The 5 um element (W) is the right choice when downstream valves, cylinders or instruments need finer filtration than the standard 40 um grade; the differential-pressure drain suits installations that are not checked daily, while manual drain (M) or automatic drain (A) are alternatives on the same frame. This unit is the low-pressure L type, so confirm your working pressure falls in that band; the check valve (K) is worth specifying wherever a dropped supply must not dump the downstream circuit. No gauge is fitted - a square or round gauge with MPa, psi or bar scale can be ordered separately - and no bracket is included (J). Thread here is NPT; PT is the standard and G is the other order option. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before you order.
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 performance curves rather than a single rated figure, so we do not quote a l/min, m3/h or SCFM number for this unit. Send us your line pressure and air consumption and we will confirm the datasheet curve figures for this exact size 400, 1/2 in NPT model before you order.
The W in the code specifies the fine 5 um filter element instead of the standard 40 um grade, and the K specifies a built-in reverse/check valve that holds downstream pressure if the supply fails. Both are order-time choices on the GFR400 frame: the same size is available with the 40 um element, without the check valve, and with manual or automatic drain instead of the differential-pressure drain fitted here.
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.