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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 size 400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure in one body. This configuration has 1/2 in NPT ports, a 5 um filter element, a manual drain bowl in polycarbonate, an embedded square gauge scaled in bar, and a reverse (check) valve fitted; a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options; drain type, filter grade, gauge scale and check-valve choices let you match the unit to the line. Flow is published as curves rather than a single rating, so ask us to confirm datasheet figures for your application before ordering.
| 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 | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 3 | Gauge scale: bar. 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 filtered, regulated air to the press cylinders so clamping and forming strokes run at a set pressure, with the 5 um element keeping wear particles out of the valve stack.
Supplies the sealing jaws and hold-down cylinders with clean air at a stable setting, while the check valve holds the circuit if shop air dips during a shift.
Prepares the air feeding solenoid valves and actuators on a skid: particulate and water removed upstream, pressure held steady, and the bracket simplifies panel mounting.
Size 400 with 1/2 in NPT ports suits lines plumbed at 1/2 in; if your air demand points to a different flow band, step up or down a size and we will check the flow curve against your consumption first. Drain choices on this series are manual (this unit), automatic, or differential-pressure; manual drain suits installations where someone drains the bowl on a routine, and it carries the wide 0.05-0.9 MPa (7-130 psi) adjustment range. The 5 um element is the finer option over the 40 um standard - choose it where downstream valves and cylinders want cleaner air. The embedded square gauge on this unit is scaled in bar; MPa and psi scales, and an external round gauge, are alternatives. PT is the standard thread with G and NPT as order options - this unit is specified in NPT. A mounting bracket is included and a reverse (check) valve is fitted to hold downstream pressure on supply loss.
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 this series as curves, not as a single rated figure, so we do not quote a number on the page. Tell us your line pressure and air consumption and we will confirm the sizing against the datasheet curve on request before you order.
Manual drain means someone drains the bowl on a routine - it suits attended cells and it carries the wide 0.05-0.9 MPa (7-130 psi) regulator adjustment range. Automatic and differential-pressure drains are available on the series if you prefer unattended draining. The fitted reverse (check) valve holds downstream pressure if the upstream supply is lost.
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.