The AirTAC GFR40015ALF2WG AirTAC Filter Regulator G1/2 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 GFR40015ALF2WG is a size-400 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration carries a G1/2 (BSPP) port, a 5 um filter element (code W, finer than the 40 um standard), an automatic drain that vents collected condensate without manual attention, and a low-pressure regulator type for applications set below standard ranges. The embedded square gauge reads in psi, a mounting bracket is included, and the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) covering a range of ports and flow capacities, with options including 40 um or 5 um filtration, differential-pressure, automatic or manual drains, MPa, psi or bar gauge scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm flow or any datasheet figure for your application before ordering.
| Model | GFR40015ALF2WG AirTAC Filter Regulator G1/2 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 | 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. |
| 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. |
| (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) |
Filtered, regulated air supplied to fixture clamps on a machining centre, where the 5 um element protects clamp valves from particulate and the low-pressure regulator holds a gentle, consistent clamp force. The automatic drain suits a cell that runs unattended between shifts.
Conditioning the air feed to vacuum and gripper cylinders on a packaging conveyor, where the filter-regulator removes water and fines in one body and the psi gauge lets line staff verify set pressure at a glance. The included bracket mounts the unit at the line drop.
Supplying clean, low-pressure regulated air to bench-top test rigs and pilot rigs in an R&D or quality lab, where the 5 um grade keeps sensitive instrumentation clean and the square psi gauge gives a clear local reading for test records.
Size 400 with a 1/2 in port suits lines whose flow demand sits in the upper mid-range; step down to 200/300 for smaller circuits or up to 600 for higher flow, since the port step is the main sizing lever. Choose the automatic drain on this model where the unit is hard to reach or the line runs unattended; manual drain suits attended, intermittent duty, and the differential-pressure default drains only when the pressure drop warrants it. The 5 um element (code W) is the right pick where downstream valves or instruments tolerate less particulate than the 40 um standard allows; note the finer element loads faster and check the drain choice accordingly. The square gauge is fitted here reading psi; MPa and bar scales and an external round gauge are alternatives. Thread is G (BSPP) as coded, with PT standard and NPT available as order options, and a bracket is included for panel or surface fixing. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing against the datasheet before you order.
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 rather than a single rated figure, so there is no one rated flow number we can honestly quote. Send us your required flow and working pressure and we will confirm the sizing from the datasheet curves on request before you order.
The A in the code GFR40015ALF2WG specifies an automatic drain, which ejects collected condensate from the bowl without anyone opening it - the right choice for unattended or hard-to-reach installations. The same series is also available with a manual drain or the differential-pressure default drain, so you can reorder in another drain type if your maintenance routine prefers it.
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.