The AirTAC GFR40010ALF2WGK AirTAC Filter Regulator G3/8 5um 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 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 GFR40010ALF2WGK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one 3/8 in unit does both jobs in the air-preparation position. This configuration carries the 5 um filter element (code W) for finer filtration than the 40 um standard, an automatic drain that bleeds collected condensate from the PC bowl without manual attention, and the low-pressure regulator type for circuits that run at reduced setpoints. It is fitted with the embedded square gauge scaled in psi, a reverse/check valve (code K), and a mounting bracket.
This is a genuine AirTAC part in the GFR400 size family, which spans sizes 200 to 600 with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40010ALF2WGK AirTAC Filter Regulator G3/8 5um Auto Drain |
|---|---|
| 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 | 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. |
|---|---|
| 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding clamps or a light pneumatic press on a machining cell: the 5 um element protects the cylinder seals from particulate and water while the low-pressure regulator holds a reduced, repeatable setpoint for the clamp force circuit.
Supplying the pick-and-place cylinders and grippers on a packaging line: one 3/8 in body filters and regulates the air, the automatic drain keeps condensate off the valves during continuous shifts, and the psi gauge gives operators a readable setpoint.
Regulating air to screwdriving and handling actuators in a robotics assembly cell: the reverse/check valve holds the downstream circuit if supply dips, the 5 um grade suits sensitive directional valves, and the included bracket simplifies panel mounting.
Pick the GFR400 size and its 3/8 in port by stepping up from smaller 200/300 units when your line needs more flow capacity; the exact flow figures are published as curves, not a single rating, so let us check the curve against your demand before you order. Choose the drain to suit access: automatic (this model) for unattended duty, manual for periodic checks, or the differential-pressure default. Choose the 5 um element (W) when downstream valves or instruments need finer air than the 40 um standard. Gauge scale is selectable (MPa, psi or bar) and the embedded square gauge is standard, with an external round gauge optional. Thread is PT as standard with G and NPT as order options - this unit is the G-thread version. A bracket is included; the J code deletes it. The low-pressure regulator type is selected where setpoints stay below standard-range duty; its exact adjustment range is not published, so confirm it with us on request.
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 GFR400 as curves, not as a single rated number, so there is no honest one-figure answer. Tell us your operating pressure and air demand and we will confirm the datasheet curve figures for this exact model on request before you order.
Both are decoded from the model code: A in the drain position is the automatic drain, which expels collected condensate from the PC bowl without manual intervention, and W is the 5 um filter grade, one step finer than the 40 um standard. If you would rather check the bowl yourself or need the coarser element, the equivalent manual-drain and 40 um versions exist in the same GFR400 family.
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.