The AirTAC GFR400-10G AirTAC Filter Regulator G3/8 with Auto Drain is a genuine G-series filter regulator: water separation, 40 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 GFR400-10G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is fitted with a G3/8 (BSPP) port, a 40 um standard filter element, an automatic drain that ejects collected condensate without manual attention, and a built-in square gauge reading in psi. A reverse (check) valve is fitted, and the polycarbonate bowl is protected by a mounting bracket included as standard. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, manual or automatic drains, a 5 um optional element (code W), gauge scales in MPa, psi or bar, and G or NPT thread variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR400-10G AirTAC Filter Regulator G3/8 with Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 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 | 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding wrapper and cartoner cylinders with clean, regulated air: the 40 um element strips water and debris before the regulator sets a stable working pressure, and the automatic drain keeps condensate off the shop floor without daily attention.
Positioned upstream of valve actuators on a process skid, the unit filters incoming plant air and holds the actuator supply pressure steady, while the psi gauge gives operators a local setpoint readout and the check valve blocks backflow.
A bench-side point of use on a 3/8 in drop leg: filtered and regulated air for air tools and small clamps, with the bracket mounting the unit to the frame and the automatic drain handling moisture from a long supply run.
Choose the 400 size with its 3/8 in port when your line flow sits between what the 300 and 600 sizes serve; because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. This unit arrives with the automatic drain, which suits unattended duty; a manual-drain variant is available if you prefer scheduled draining, and the differential-pressure type is the catalogue default. The 40 um element is standard - specify 5 um (code W) where finer particulate removal is needed. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are options. The G (BSPP) thread is the ordered variant here, with PT as the catalogue standard and NPT also available. A bracket is included, and the fitted check valve prevents reverse flow.
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, not as a single rated figure, so we do not quote a number here. Tell us your working pressure and air demand and we will confirm the flow from the datasheet for this exact 400-size, 3/8 in configuration on request.
The A in the code GFR40010AF2GK specifies an automatic drain, which ejects collected condensate from the bowl without manual intervention - useful for unattended or hard-to-reach installations. If you prefer to drain on a schedule, the same filter regulator is available with a manual drain, and the differential-pressure type is the catalogue default.
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.