The AirTAC GFR400-15 AirTAC Filter Regulator G1/2 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 GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This unit is built in size 400 with a G1/2 (BSPP) port, an automatic drain that discharges collected condensate without manual attention, the standard 40 um filter element, and the low-pressure regulator type. A round psi gauge is fitted, a reverse/check valve is fitted, and no mounting bracket is included.
This is a genuine AirTAC part in the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing; at size 400 the bowl is polycarbonate (PC). Options across the series include manual or differential-pressure drains, a 5 um element (code W), PT or NPT threads, and gauge scales in MPa, psi or bar. Flow is published as curves rather than a single rating, so ask us to confirm figures for your application.
| Model | GFR400-15 AirTAC Filter Regulator G1/2 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 — round, 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. 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. |
| 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. |
| 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) |
Supplies filtered, regulated air to clamp and fixture cylinders on CNC machining lines, where workholding calls for a steady, lower regulated setting than the main shop supply.
Feeds filtered and regulated air to spray guns and atomising lines in paint and coating booths, keeping water and particulate out of the finish at the gun drop.
Protects cylinders and actuators on packaging and cartoning conveyor lines by removing condensate and particulate and regulating pressure at the machine take-off.
Size and port set the air capacity: stay at size 400 with the 1/2 in port for typical machine drops, and match the thread to your piping - PT is the standard thread, with G (BSPP) and NPT available to order. Drain type is a real choice: automatic (as fitted here) suits enclosed or unattended installations, manual suits attended checks, and differential-pressure is the catalogue default. Filter grade is 40 um standard; specify code W for 5 um where finer particulate matters. Gauge scale is selectable in MPa, psi or bar, and a bracket can be ordered where this no-bracket version does not suit the mounting. Because flow is published as curves rather than a single rating, 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 rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
The L code marks the low-pressure regulator type, specified where the application calls for lower regulated settings than the standard type. The exact adjustment range for this type is not published in the material we hold, so we confirm it on request. Maximum inlet pressure remains 1.0 MPa (145 psi), and the unit filters and regulates in one body like any GFR.
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.