The AirTAC GFR40010LJF2WK AirTAC Filter Regulator 3/8 in PT, 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 GFR40010LJF2WK is a filter regulator: water and particulate removal plus downstream pressure regulation combined in a single GFR400 body. This configuration is built on 3/8 in PT ports and carries the fine 5 um filter element (code W) instead of the standard 40 um grade, so it suits air that feeds sensitive valves, actuators or instruments. The regulator is the low-pressure type, and the unit drains automatically in service through its differential-pressure drain, which bleeds accumulated condensate whenever the pressure differential across the element calls for it. An embedded square gauge reading in psi is fitted so you can set and monitor the outlet pressure directly, and a reverse/check valve (code K) is installed to hold the downstream setting if the supply is interrupted. No mounting bracket is included with this code, so plan to mount it in-line or on your own manifold.
This is a genuine AirTAC part. The GFR400 filter-regulator family spans the larger end of the G-series size range, with port options, drain types (differential-pressure, automatic or manual), 40 um and 5 um filter grades, gauge choices and G or NPT thread variants available to order. Flow is published by AirTAC as curves rather than a single rated figure, so ask us to confirm the flow and datasheet details for your application before ordering.
| Model | GFR40010LJF2WK AirTAC Filter Regulator 3/8 in PT, 5 um |
|---|---|
| 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 | Differential-pressure 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". |
| (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. |
| J | Supplied without bracket. |
| (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) |
Feeding a carton-sealing line's directional valve island with filtered, regulated air: the 5 um element keeps fine debris out of the valve spools, the low-pressure regulator sets a gentle circuit pressure, and the square psi gauge lets operators verify the setting at a glance.
Supplying pneumatic actuators on laboratory and analytical equipment, where the 5 um grade protects delicate pilot circuits, the check valve holds the set pressure if plant air dips, and the differential-pressure drain keeps condensate out of precision tooling.
Regulating air to low-pressure blowing and tensioning stations on textile machinery: the low-pressure regulator type matches the modest set pressures of the process, the 3/8 in PT connection suits the machine's existing piping, and the psi gauge supports routine line checks.
Choose the GFR400 size when your line runs on 3/8 in PT ports and you want filtration and regulation in one body instead of a separate filter and regulator. The key decodable choices in this code are: the 5 um element (versus the 40 um standard) for cleaner air downstream; the differential-pressure drain, which needs no manual attention but relies on flow to purge condensate; the low-pressure regulator type, for circuits set well below standard working pressures; the square gauge with psi scale; and the fitted reverse/check valve for hold-up of downstream pressure. Thread is PT as standard, with G (BSPP) and NPT available as order options, and this code omits the mounting bracket.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we cannot quote a rated flow here. Send us your application details and we will confirm the sizing against the datasheet curves 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 series as performance curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application - port size, expected demand and set pressure - and we will confirm the flow from the datasheet curves on request before you order.
The L in the code marks the regulator as the low-pressure type, intended for circuits set well below standard working pressures; the exact adjustment range for the low-pressure type is not published in our sheet, so we confirm it on request. The K code means a reverse/check valve is fitted, which holds the downstream pressure if the upstream supply drops. This unit also has the 5 um element (W), a differential-pressure drain, a square psi gauge, PT3/8 ports and no mounting 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.