The AirTAC GFR400-15AJNWT AirTAC Filter Regulator NPT1/2 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 automatic 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 GFR400-15AJNWT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size 400 unit with a 1/2 in NPT port, a fine 5 um filter element (the tighter option versus the standard 40 um), an automatic drain that expels collected condensate without manual attention, and the standard regulator covering 0.15-0.9 MPa (20-130 psi). No gauge is fitted and no mounting bracket is included, so plan your panel or machine layout accordingly.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and thread options in PT (standard), G and NPT. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-15AJNWT AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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 | Standard 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard 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. |
| (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) |
On a stamping or assembly press fed from a shop air main, this 1/2 in filter regulator cleans the supply to 5 um and holds a stable regulated pressure so clamping and forming cylinders stroke consistently, with automatic drain keeping condensate out of the circuit.
Carton sealers, case packers and wrap stations run many small valves and actuators off one supply; this unit filters water and fine particles that cause valve sticking and regulates the header pressure feeding the machine's air manifold.
Sorting and diverting gates on a conveyor line actuate many times per shift; a 5 um filtered and regulated 1/2 in supply keeps moisture and debris out of the gate cylinders and holds consistent actuation pressure across the line.
Sizing a GFR filter regulator starts with the port and size step: this unit is size 400 with a 1/2 in port, one step up from the 300 series, so choose it when your line's flow demand sits above what a 3/8 in unit carries - we will confirm the match against the published flow curves before you order. The 5 um element in this code is the right pick when downstream valves, cylinders or instruments need cleaner air than the standard 40 um grade provides. The automatic drain suits unattended or hard-to-reach installations; if you prefer to control drainage manually, a manual-drain variant exists and carries a wider 0.05-0.9 MPa adjustment range. Thread here is NPT; PT is the catalogue standard and G is also orderable. No gauge is fitted - a square or round gauge in MPa, psi or bar scales can be specified - and no bracket is included, so add mounting hardware to your plan.
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 figure, so we do not quote a number here. Tell us your application's flow and pressure demand and we will confirm the sizing against the datasheet curves on request before you order.
This unit's code includes the A drain option, which expels collected condensate automatically - useful where the unit sits in an inaccessible spot or on a line that runs unattended. Manual-drain variants of the GFR series are also available and carry a wider 0.05-0.9 MPa (7-130 psi) adjustment range versus the 0.15-0.9 MPa (20-130 psi) range of this automatic-drain configuration.
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.