The AirTAC GFR400-15 AirTAC Filter Regulator, PT1/2, 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 GFR400-15 is a size-400 filter regulator that removes water and particulate from compressed air and holds downstream pressure in one body. This configuration is fitted with a 5 um filter element (code W) for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and an embedded square gauge reading in psi. The port is PT1/2 (1/2 in PT thread), the maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR400 series is the largest of the 200/300/400/400-plus sizes in the GFR line, with options across thread (PT standard, G and NPT to order), drain type (automatic, manual, or differential-pressure), filter grade (40 um standard, 5 um optional), gauge scale (MPa, psi, or bar), and low-pressure or standard regulator types. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator, PT1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeds filtered, regulated air to the tool-change cylinders and clamping fixtures of a machining center, where the 5 um element helps keep fine debris out of tight-tolerance valve spools and the psi gauge gives operators a direct read at the machine.
Conditions the air feeding spray guns and atomizing headers on a finishing line, where water carryover ruins finish quality; the automatic drain keeps condensate off the guns without a manual drain routine between shifts.
Supplies the valve island and cylinder bank of a cartoning or wrapping machine, holding a stable regulated pressure to the actuators while the 5 um grade protects the directional valves from particulate wear.
Choose the 400 size with its PT1/2 port when your line runs 1/2 in piping and you want the larger body of the GFR range; step down to 300 or up within the series as your port and flow needs change. This code pairs the 5 um element with an automatic drain - the right combination when downstream equipment such as valves or sensitive actuators needs finer air and you cannot rely on someone draining a bowl on schedule. If your medium is clean enough, the standard 40 um grade with the same drain is the economical alternative. The square gauge here reads psi; MPa or bar scales are available on other codes, and an external round gauge is an option. Thread is PT as standard - order G (BSPP) or NPT variants if your installation uses those. No bracket is included with the J code; add one if you want panel or surface 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. 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 GFR400 series as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
In the code GFR40015AJF2W, the A position selects the automatic drain, which expels collected condensate on its own instead of relying on manual draining or a differential-pressure trigger, and the W position selects the 5 um filter element instead of the standard 40 um grade. Both are decodable choices you can swap on other codes if your application needs manual draining or coarser filtration.
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.