The AirTAC AirTAC GFR40010ALF2WG Filter Regulator G3/8, 5 um 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 PT3/8" 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 GFR40010ALF2WG is a size-400 GFR filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration carries a G3/8 (BSPP) port, a 5 um filter element (code W, against the 40 um standard), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for circuits that run well below standard line pressure. The embedded square gauge is fitted with a psi scale, a mounting bracket is included, and the polycarbonate bowl is rated for a maximum inlet pressure of 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, drain choices (differential-pressure, automatic or manual), filter grades of 40 um or 5 um, gauge scales in MPa, psi or bar, and PT, G or NPT threads. 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 | AirTAC GFR40010ALF2WG Filter Regulator G3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (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. |
|---|---|
| 10 | Port size PT3/8". 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Pneumatic clamps and soft-grip fixtures on a machining centre often hold parts at reduced pressure to avoid marking finished surfaces. This filter regulator cleans the supply to 5 um, drains condensate automatically and lets the setter read the clamping pressure directly in psi on the square gauge.
Pusher and divert cylinders along a packaging conveyor need clean, moisture-managed air held at a steady reduced setting so product handling stays gentle and repeatable. The automatic drain keeps the bowl clear between shifts without an operator walking the line.
A laboratory or pilot-plant test rig running air cylinders and low-pressure process air benefits from 5 um filtration to protect sensitive instruments and from the low-pressure regulator type, with the psi-scaled gauge giving a direct readout for test records.
Step through the real choices before ordering: pick the size (200/300/400/600) and port against the flow your line needs, here size 400 with a G3/8 port; choose the drain, where automatic suits points that are hard to reach or run unattended, manual suits attended stations, and differential-pressure is the default; choose 40 um for general protection or 5 um (this unit, code W) where finer particulate removal matters; set the gauge scale (MPa, psi or bar) and thread (PT standard, with G and NPT as order options); and decide on the bracket. This unit is the low-pressure regulator type, so confirm the reduced-pressure band your circuit needs with us before ordering.
One honest note on sizing: AirTAC publishes flow as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the flow and datasheet figures against this exact model 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 GFR series as curves rather than a single rated figure, so we do not quote a flow number here. Tell us your application - supply pressure, downstream demand and acceptable pressure drop - and we will confirm the flow and datasheet figures for this exact model on request before you order.
The A in the code sets the automatic drain: the bowl expels collected condensate on its own, which suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives in the same family. The W code sets the 5 um element instead of the 40 um standard, giving finer particulate removal for downstream valves, cylinders and instruments.
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.