The AirTAC GFR400-15G AirTAC Filter Regulator 1/2" Low-Pressure 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 regulates downstream pressure in a single body. This size 400 configuration has a G1/2 port, an automatic drain that expels collected condensate without manual attention, standard 40 um filtration, and an embedded square gauge reading in psi. The regulator is the low-pressure type, and 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). A mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch and PT, G or NPT thread options. Drain type, filter grade, gauge scale and low-pressure variants are all selectable within the series. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15G AirTAC Filter Regulator 1/2" Low-Pressure |
|---|---|
| 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 | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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. |
| (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) |
On a fixture-building line, this unit filters the shop air and holds a low, steady regulated supply to clamping cylinders, with the automatic drain clearing condensate between shifts.
Fitted at the drop into a cartoning or wrapping machine, it delivers clean, low-pressure regulated air to the machine's cylinders and air bearings while the psi gauge gives operators a visible setpoint.
Mounted ahead of a paint spray booth manifold, it removes water and pipe scale from the compressed air and regulates it down to the low pressure the spray equipment expects.
Step up or down through the GFR sizes (200 to 600, 1/8 to 1 inch ports) to match the air demand of your line - because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering. Drain choice matters in service: this unit has an automatic drain, while manual and differential-pressure drains are also available in the series; note that the regulation range on standard-type units is quoted by drain type, and this low-pressure type has its own published range - confirm it with us. Filtration is 40 um standard, with 5 um (code W) where finer particulate capture is needed. The embedded square gauge reads psi here; MPa and bar scales are alternatives, and an external round gauge is optional. Thread is PT as standard with G and NPT as order options; a bracket is included on this unit (code J omits it).
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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet curves on request before you order.
The A in this code specifies an automatic drain, which discharges collected condensate from the polycarbonate bowl on its own - useful on unmanned or hard-to-reach installations. Manual and differential-pressure drain versions are available in the same series if you prefer a different arrangement.
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.