The AirTAC GFR40010LC3WTK AirTAC Filter Regulator NPT3/8, 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 GFR40010LC3WTK is a GFR400-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built on the 400 size with a 3/8 in NPT thread, carries a 5 um filter element (code W) for finer filtration than the standard 40 um grade, and drains condensate by differential pressure, so no drain fitting has to be operated by hand. It is the low-pressure type (code L) for circuits that run below standard regulator settings, and it ships as coded with a round pressure gauge reading in bar, a reverse/check valve (code K) and a mounting bracket.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, gauge styles and scales, and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40010LC3WTK AirTAC Filter Regulator NPT3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
On a fixture-clamping manifold that runs at reduced pressure, this filter regulator cleans the supply air through the 5 um element and holds the clamp circuit at its set pressure, with the bar gauge giving the operator a direct readout.
Feeding spray or coating equipment, the 5 um element strips water and fine particulate that would spoil finish quality, while the regulator keeps the supply steady and the differential-pressure drain clears collected condensate without operator attention.
On sorting conveyors where diverters and gate cylinders run at a lower pressure than the main header, the low-pressure type regulator steps the branch down after the filter section, and the reverse/check valve holds the branch against backflow.
Start with the port step: the 400 size with a 3/8 in NPT thread sits in the middle of the GFR range, so step up to 600 or down to 300/200 depending on the pipe and the flow your line needs. This unit is the low-pressure type (L), the right choice when the working circuit runs below standard regulator settings; the exact adjustment range for the low-pressure type is not published, so confirm it with us. The 5 um element (W) suits finer filtration than the 40 um standard grade. Drain is differential-pressure by default; automatic (A) or manual (M) drains are orderable alternatives. The round gauge here reads in bar; square embedded gauges and MPa/psi scales are the other catalogue options. Thread is NPT as coded, with PT (standard) and G also available, and the bracket is included.
Because flow for this series is published as curves and not as a single rated figure, ask us to confirm sizing against your application 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the flow your application needs and we will confirm the sizing from the datasheet on request.
L marks the low-pressure type of the GFR400 regulator, intended for circuits that run below standard regulator settings. The exact adjustment range for the low-pressure type is not published in the material we hold, so confirm the range with us before ordering. Everything else in the code decodes normally: NPT3/8 port, 5 um element, differential-pressure drain, round bar gauge, reverse/check valve and included bracket.
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.