The AirTAC GFR400-15NWT AirTAC Filter Regulator, NPT 1/2 in 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 GFR400-15NWT is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in one compact body. This 400-size unit has a 1/2 in NPT port, 5 um filtration (the fine W grade, tighter than the 40 um standard element), differential-pressure auto drain, and a standard regulator with a 0.15-0.9 MPa (20-130 psi) setting range. No gauge is fitted with this code, so add your own downstream gauge if you need to read set pressure. The polycarbonate bowl suits the -5 to 70 C non-freezing operating range.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, thread choices of PT (standard), G and NPT, drain types, filter grades and gauge options. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR400-15NWT AirTAC Filter Regulator, NPT 1/2 in |
|---|---|
| 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure 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. |
| (blank) | Mounting bracket included. |
| 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) |
Feeds filtered, regulated air to a clamping cylinder on a machining fixture, holding a stable clamp pressure while the 5 um element protects the valve from water and fine debris.
Sits at the drop of a cartoning or wrapping line, cleaning the plant air and setting the pressure that actuates the machine's pick-and-place and sealing cylinders.
Prepares air for the solenoid valves and air cylinders that drive gates, stops and diverters along a conveyor line, with automatic condensate drain keeping moisture out of the valves.
Step up through the GFR sizes (200/300/400/600) as your port and flow demand grows; the 400 size with a 1/2 in NPT port sits in the upper mid-range of the family. Choose the 5 um W element when downstream valves, cylinders or instruments need finer air than the 40 um standard element provides. The differential-pressure drain on this code discharges collected condensate automatically as the pressure differential builds; if you prefer fully automatic or manual draining, those are separate codes in the family. Gauge codes (round or square, MPa/psi/bar scales) are available if you want a fitted pressure gauge. PT is the standard thread; G and NPT are order options, and this unit is specified NPT. A mounting bracket is included.
Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order.
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 application and required flow, and we will confirm sizing against the datasheet on request.
The N code in GFR400-15NWT means no gauge is fitted. Gauge options exist in the GFR family - round or square, with MPa, psi or bar scales - so if you want to read the set pressure directly, order the gauge-equipped variant of the same size and 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.