The AirTAC GFR400-15AF2WTK 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 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 GFR400-15AF2WTK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size-400 unit is fitted with NPT 1/2 in ports, a 5 um filter element for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, an embedded square gauge reading in psi, and a reverse (check) valve that holds downstream pressure when the upstream supply is lost. The polycarbonate bowl suits this size, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR filter-regulator line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge scale options, and G, NPT or PT threads. Flow is published as curves rather than a single rating, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR400-15AF2WTK 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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. 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. |
| (blank) | Mounting bracket included. |
| (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. |
| 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 clean, regulated air to tool-clamp and pallet-changer circuits on a machining centre, with the 5 um element protecting precision valves and the check valve holding clamp pressure during a supply dip.
Conditions and regulates air for carton-forming and case-sealing cylinders on a packaging line, where the automatic drain keeps condensate out of the actuators without a daily bowl check.
Supplies filtered, regulated air to analytical and test-bench instrumentation, where the fine 5 um grade and a stable psi-set output protect sensitive pneumatic controls.
Start with the port: this unit is 1/2 in NPT, one step up from 3/8 in and one below 3/4 in in the GFR size ladder - match it to your line size and required flow, and step up a size if pressure drop matters. Filtration here is the fine 5 um element (code W); choose it when downstream valves and instruments need cleaner air than the standard 40 um grade. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives in this family. The fitted square gauge reads in psi; MPa and bar scales are also available. PT is the standard thread, with G (BSPP) and NPT as order options, and a mounting bracket is included with this unit.
Flow for GFR units is published as curves, not a single rated figure, so 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves rather than a single rated figure, so we do not quote a rated flow number. Send us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet on request.
The A in the code sets the automatic drain, which ejects collected condensate on its own - useful where the unit is mounted out of easy reach. The W sets the 5 um filter element, one grade finer than the 40 um standard, for applications with sensitive downstream components.
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.