The AirTAC GFR400-15G AirTAC Filter Regulator 1/2 in, 5 um, Auto Drain is a genuine G-series filter regulator: water separation, 5 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 size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a G1/2 (BSPP) port, a 5 um filter element for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator type for applications that run at reduced downstream pressures. The embedded square gauge is fitted with a psi scale, a reverse/check valve is fitted, and the mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, thread options in PT, G (BSPP) and NPT, drain choices, filter grades and gauge scales. Max working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR400-15G AirTAC Filter Regulator 1/2 in, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 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 | 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. |
| (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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds filtered, regulated air to the clamp-and-seal cylinders on a carton packaging line, with the automatic drain keeping condensate off the valves during continuous shifts.
The 5 um element and low-pressure regulation suit a paint spray booth feed, where fine particulate in the air supply would otherwise show up as surface defects.
Supplies regulated air to the pop-up divertors and stoppers along a conveyor line, with the included bracket simplifying mounting beside the control valve manifold.
Size 400 with a 1/2 in port suits lines with substantial air demand; step down to 300 or up to 600 if your flow requirement differs - flow is published as curves, not a single rating, so confirm sizing with us before ordering. The 5 um element (code W) is the right choice where finer particulate removal matters; the standard grade is 40 um. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the other catalogue options. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are available. Thread here is G (BSPP); PT is the standard thread and NPT is an order option. The bracket is included with this unit.
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 application and we will confirm the datasheet flow figures on request so you can size the unit correctly.
The automatic drain expels collected condensate from the bowl on its own, which suits installations that are hard to reach or run unattended. Manual and differential-pressure drains are the other catalogue options if you prefer to control drainage yourself. Note the PC bowl on this size 400 unit and the -5 to 70 C non-freezing operating range.
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.