The AirTAC GFR40010LC2WGK AirTAC 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 differential-pressure 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 GFR40010LC2WGK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with no lubricator. This size-400 unit is specified with a G3/8 (BSPP) port, a fine 5 um filter element (code W, in place of the 40 um standard), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises, and a reverse/check valve (code K) that holds downstream settings if upstream supply is interrupted. It is the low-pressure type (code L) and carries a round pressure gauge reading in psi; max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 400 frame (only size 600 uses an aluminium alloy bowl), and a mounting bracket is included.
This is a genuine AirTAC part from the GFR400 series. The G-series range spans sizes 200, 300, 400 and 600 with port sizes from 1/8 inch to 1 inch, and options for drain type, filter grade, gauge style and scale, thread form (PT standard; G and NPT to order), bracket and check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR40010LC2WGK AirTAC 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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". |
| (blank) | Drain: Differential-pressure 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). |
| C | Gauge shape: Round. 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) |
A low-pressure clamping or holding circuit on a machining centre, where the check valve keeps the set pressure stable if the main supply dips and the 5 um element protects the clamping valve from fine contamination.
Feeding clean, regulated air to carton-sealing and wrap stations on a packaging conveyor, where the differential-pressure drain clears condensate during running without a manual bowl visit and the psi gauge gives operators a familiar readout.
Regulating and polishing shop air feeding bench-top lab apparatus or analytical-equipment actuation, where the fine 5 um grade and low-pressure regulation suit equipment that cannot tolerate dirt or high supply pressure.
Choose the 400 frame with its 3/8 inch port when your line size and air demand sit above the 300 step; the larger frame gives the element and valve seat more room to work, but always size against actual consumption rather than port alone. This unit is already fixed at the fine 5 um grade (W), which suits instruments, valves and sensitive actuators that need cleaner air than the 40 um standard; if your circuit tolerates coarser filtration, a non-W GFR400 variant is the lighter-duty choice. The round psi gauge (C2) reads in psi, matching US practice; square embedded gauges and MPa or bar scales are the alternatives in the range. The G thread here is the catalogue option to order - PT is the standard thread form, with NPT also available. Because flow is published as curves and not a single rating, send us your application details and we will confirm sizing against the datasheet 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 this series as curves rather than a single rated figure, so we do not quote one number. Send us your operating pressure and air consumption and we will confirm the flow from the datasheet for your application before you order.
In the GFR code, C2 selects the optional external round gauge with a psi scale (the embedded square gauge is standard, with MPa, psi or bar scales available), and K specifies a built-in reverse/check valve that holds the downstream setting if upstream pressure is lost. This unit is also the low-pressure type (L) with a 5 um element (W); its exact adjustment range is not published in the shared sheet, so confirm it with us on request.
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.