The AirTAC GFR400-15G AirTAC Filter Regulator G1/2 Automatic Drain 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: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is fitted with a G1/2 (BSPP) port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and an embedded square gauge reading in psi. The standard regulator adjusts between 0.15-0.9 MPa (20-130 psi), a reverse/check valve is fitted, and a mounting bracket is included. The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 to 1 inch, G (BSPP) or NPT threads to order, manual or differential-pressure drains, a 5 um (code W) element, alternative gauge scales in MPa or bar, and an external round gauge option. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15G AirTAC Filter Regulator G1/2 Automatic Drain |
|---|---|
| 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 — 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. |
| (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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds filtered, regulated air to the clamp and fixture cylinders on a machining centre, with the psi gauge letting setters verify clamp pressure at the machine and the automatic drain clearing condensate between shifts.
Supplies regulated air to the diverters, pushers and stop cylinders along a packaging or bottling conveyor line, where the 40 um element protects seals from particulate and the check valve holds settings if supply dips.
Installed at a wall-mounted air drop serving pneumatic valve actuators and positioners in a process area, with the included bracket fixing the unit beside the take-off and the automatic drain handling moisture in the header air.
Size and port set the flow path: the 400 size with a 1/2 inch G port sits mid-range in the GFR family, one step above the 300 and below the 600. Choose the automatic drain on this unit where the installation is not visited daily; a manual drain (code M) suits attended stations, and the differential-pressure default suits standard duty. The 40 um element fitted here is the standard grade; specify 5 um (code W) where finer particulate removal is needed. The square gauge reads psi; MPa or bar scales and an external round gauge are order options. G (BSPP) thread is specified here, with PT standard and NPT available to order, and the bracket is included. 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. The reflux valve permits reverse flow 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 figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for this 400-size, 1/2 inch unit on request before you order.
This unit carries code A, the automatic drain, which discharges collected condensate without anyone opening the bowl - the right choice for unattended cells or hard-to-reach drops. A manual drain (code M) or the differential-pressure default can be ordered instead if your maintenance routine prefers them.
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.