The AirTAC GFR400-15G AirTAC Filter Regulator G1/2 Auto Drain 40 um is a genuine G-series filter regulator: water separation, 40 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 GFR400-15G is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration is built on the size 400 frame with G1/2 (BSPP) ports, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and a round pressure gauge reading in psi. It is ordered without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include a 5 um element (code W), manual or differential-pressure drain, embedded square or external round gauges with MPa, psi or bar scales, and NPT thread in place of G. Rated flow is published as curves rather than a single figure, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR400-15G AirTAC Filter Regulator G1/2 Auto Drain 40 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 40 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, psi scale |
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Mounted at the drop feeding impact wrenches and nutrunners on an automotive assembly line, it strips water and pipe scale from the supply and holds a steady set pressure so tools behave consistently through a shift.
Installed ahead of tape heads and flap-fold cylinders on a carton-sealing conveyor, it keeps the air clean and the cylinder pressure stable so boxes close squarely without the crew re-adjusting regulators between batches.
Fitted on the air drop serving a machining center's tool changer and clamping circuit, it removes condensate that would corrode cylinders and holds the clamp pressure the fixture design calls for.
Start with the size and port step: this unit is size 400 with 1/2 in ports, the larger step in the range for lines that need more air at the point of use. The regulation range with the automatic drain fitted is 0.15-0.9 MPa (20-130 psi); if your setpoint sits below 0.15 MPa, the manual-drain variant widens the range to 0.05-0.9 MPa (7-130 psi). The standard 40 um element suits general air prep, while the 5 um option (code W) is there when finer filtration is needed. Gauge choice is yours: the embedded square gauge is standard and external round gauges can be ordered with MPa, psi or bar scales - this unit carries a round psi gauge. Thread is G (BSPP) here; PT is the standard thread and G/NPT are catalogue options to order. A mounting bracket can be added if the unit will not sit on a manifold. One honest note: flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 G-series flow as performance curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote honestly. Tell us your application and required flow, and we will confirm against the datasheet curves whether this 1/2 in size 400 unit is the right step before you order.
The automatic drain expels collected condensate on its own, which suits units mounted in awkward spots or lines that run unattended. The alternatives are a manual drain, which you empty yourself and which widens the regulation range down to 0.05 MPa, and the differential-pressure drain, the catalogue default. All three are orderable on this series.
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.