The AirTAC AirTAC GFR400-15 Filter Regulator 1/2 in NPT 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 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration is the size 400 unit with a 1/2 in NPT port, an automatic drain that ejects collected condensate without manual attention, a fine 5 um filter element (the W grade, one step finer than the 40 um standard), a round pressure gauge reading in MPa, a built-in reverse/check valve, and a mounting bracket included. The standard regulator covers 0.15-0.9 MPa (20-130 psi) adjustment, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits the size 400 frame; only the size 600 units use an aluminium bowl.
This is a genuine AirTAC part. The GFR family runs from size 200 through 600, with port options in PT (standard), G and NPT, drain choices of differential-pressure, automatic or manual, filter grades of 40 um or 5 um, and gauge styles and scales to suit your panel. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | AirTAC GFR400-15 Filter Regulator 1/2 in NPT 5 um |
|---|---|
| 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 — round, MPa 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
Supply filtered, regulated air to the machine's pneumatic clamps, tool-change cylinders and chip-ejection actuators, keeping supply pressure steady through the shift while the automatic drain clears condensate on its own.
Feed the line's actuator-driven capping, labeling and diverting stations from a single 1/2 in drop, with the 5 um element protecting the direction valves from water and fine particulate carryover.
Provide clean, regulated air to weld-gun grippers and positioner clamps, where the check valve helps hold the downstream circuit and the round MPa gauge lets technicians verify set pressure at a glance.
Size and port are the first choice: the GFR range steps through sizes 200, 300, 400 and 600 with matching ports from 1/8 in up to 1 in, so pick the size whose flow curve covers your demand rather than guessing from port size alone. This unit carries the 5 um element (code W); choose it when downstream valves, cylinders or instruments need finer filtration than the 40 um standard. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other codes. The round MPa gauge is fitted here, and square or round gauges with psi or bar scales can be specified on other codes. Thread is NPT on this code; PT is the catalogue standard and G is also available. A bracket is included, and the K code adds a reverse/check valve. Because flow is published as curves and not a single rating, send us your air demand 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 G-series flow as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application's air demand and we will confirm the datasheet flow curve for this exact configuration before you order.
The A in the code sets the automatic drain, which ejects collected condensate without anyone opening the bowl - useful for unattended cells. The W sets the 5 um filter element, one grade finer than the 40 um standard, for downstream equipment that needs cleaner air. Both are order choices; the 40 um grade and a manual or differential-pressure drain are available on other GFR codes.
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.