The AirTAC GFR400-15G AirTAC Filter Regulator G1/2 Auto 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 configuration is the size 400 unit with a G1/2 (1/2 in) G-thread port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and the embedded square gauge fitted with a psi scale. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C (non-freezing), and the polycarbonate bowl suits this size.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options include a 5 um filter element (code W), manual or differential-pressure drain, gauge scale in MPa, psi or bar, an external round gauge, and NPT or PT threads in place of G. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15G AirTAC Filter Regulator G1/2 Auto 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 | 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). |
| 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. |
| (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) |
Installed at the drop of a plant air main feeding a cartoning or wrapping machine, this unit cleans water and debris from the supply and holds a steady regulated pressure to the machine's air cylinders, with the automatic drain handling condensate between shifts.
Mounted at the inlet to the valve manifold that drives conveyor gate and stopper cylinders, the GFR400-15G strips line moisture before it reaches the valves and lets a technician set and read the working pressure on the psi-scaled square gauge.
Fitted ahead of a robot cell's FRL-fed tooling circuits, this filter regulator gives each cell its own filtered, regulated air supply at the 1/2 in main, so pressure tuning on one cell does not disturb neighbouring equipment.
Choose the size 400 / G1/2 step when your line's flow demand sits at the upper end of the G-series range - flow is published as curves, not a single rating, so confirm sizing against your application with us before ordering. Drain type is a real choice here: automatic (this unit) suits unattended duty, manual drain suits supervised installations, and the differential-pressure default drains on a pressure differential. The 40 um element is standard; specify the W code for 5 um when finer particulate removal matters. This unit carries the embedded square gauge with a psi scale; MPa or bar scales and an external round gauge are alternatives. Thread is G (BSPP) on this model - PT is the catalogue standard and NPT is an order option - and this configuration omits the mounting bracket.
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.
Flow for the GFR series is published as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your application and we will confirm the datasheet flow figures for the size 400 / G1/2 unit on request before you order.
The A in the code GFR40015AJF2G selects the automatic drain, which expels collected condensate from the bowl without manual attention - the alternatives are manual drain and the differential-pressure default. The F2 selects the embedded square gauge with a psi scale; MPa or bar scales and an external round gauge can be ordered instead. This unit also omits the mounting bracket (code J) and carries the standard 40 um filter element.
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.