The AirTAC GFR40010ALF2K AirTAC Filter Regulator PT3/8, 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 GFR40010ALF2K 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 3/8 in PT port, an automatic drain that expels collected condensate without manual attention, a standard 40 um filter element, and a low-pressure regulator type for applications set below standard regulator ranges. A square pressure gauge reading in psi is included, a reverse/check valve is fitted to hold downstream pressure, and a mounting bracket is supplied.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 in, a choice of drain types, 40 um or 5 um (W) filtration, gauge scale options, and G or NPT thread variants to order. Flow is published as curves rather than a single rating, so we confirm datasheet figures on request before you order.
| Model | GFR40010ALF2K AirTAC Filter Regulator PT3/8, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 40 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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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) |
On pneumatic clamping and holding fixtures that run at reduced set pressures, the low-pressure regulator holds a gentler, stable downstream setting while the 40 um element keeps debris out of clamp cylinders.
Feeding cylinders and actuators on a packaging or cartoning line, the automatic drain clears condensate between shifts and the check valve holds the set pressure if upstream supply dips.
At a machine-tool or fabrication-cell air drop, this 3/8 in filter regulator conditions the supply and the square psi gauge gives the operator a direct reading of the working pressure.
Size the GFR series by stepping up through 200/300/400/600 against the flow your line needs - the 400 size with a 3/8 in port sits mid-range. Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering. This unit is the low-pressure type, so confirm your set-pressure window with us; the exact range for the low-pressure variant is not published. Choose the drain to suit access: automatic (as here) for unattended duty, manual where you want controlled blowdown, or differential-pressure as the default. Filtration is 40 um standard; specify W for 5 um where finer particle capture matters. The square gauge reads psi; MPa and bar scales are alternatives, and an external round gauge is optional. Thread is PT as standard, with G (BSPP) and NPT as order options, and a bracket is included for panel or frame mounting.
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 series as curves rather than a single rated figure, so there is no one number we can honestly quote. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
The L code makes this a low-pressure regulator variant, intended for applications set below standard regulator ranges; the exact range is not published, so confirm your set pressure with us. The K code means a reverse/check valve is fitted, which helps hold downstream pressure if the upstream supply is interrupted.
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.