The AirTAC GFR40010ALF2WK AirTAC Filter Regulator PT3/8 Low-Pressure 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 GFR40010ALF2WK is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single body. This configuration carries a PT3/8 port, a 5 um filter element (code W) for finer removal of water and particulate than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator type. It is fitted with the embedded square gauge scaled in psi, a reverse/check valve (code K), and the mounting bracket is included. The polycarbonate bowl suits this 400 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options, thread choices (PT standard, G and NPT to order), drain types, filter grades and gauge scales to match. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR40010ALF2WK AirTAC Filter Regulator PT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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. |
| (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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Air-prep point for clamp cylinders on a CNC fixture, where the 5 um element protects the clamp valve and the low-pressure regulator holds the circuit at the set pressure.
Feeding sealers and carton-closing cylinders on a packaging conveyor, with the automatic drain clearing condensate through long shifts without operator attention.
Conditioning air for gripper and vacuum-generator circuits on an assembly robot, with the psi gauge giving the technician a direct pressure readout at the cell.
Size and port step up from 200 through 600, so choose the 400 size with its PT3/8 port when your line flow sits above what a 300 can pass - ask us to check the flow curve against your demand before ordering. Drain type is a real choice: automatic (this unit) suits unattended duty, manual suits periodic checks, and the default is differential-pressure. Filter grade is 40 um standard or 5 um with code W - this unit carries the finer 5 um element. Gauge scale is selectable (MPa, psi or bar; here square, psi), and thread is PT standard with G and NPT as order options. Bracket is included on this code.
One honest note on sizing: flow is published as curves, not a single rated figure, so send us your application details and we will confirm the correct size before you order.
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 figure, so we do not quote a number here. Send us your line pressure and air demand and we will confirm the flow curve and correct sizing from the datasheet on request.
The automatic drain (code A) discharges condensate collected in the polycarbonate bowl on its own, so the unit suits installations that run unattended. The manual-drain variant is emptied by hand at intervals, and the default is the differential-pressure type. This unit is fitted with the automatic drain.
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.