The AirTAC GFR40010ALJC3WT 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 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 GFR40010ALJC3WT is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one unit handles both air preparation jobs. This configuration is fitted with a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate without manual attention, and a round pressure gauge reading in bar. It is the low-pressure type, intended for circuits that operate at reduced settings, and it carries no reverse/check valve and no mounting bracket. The maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate (PC) bowl suits the size 400 frame; only the size 600 units use an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G (BSPP) or NPT thread, with 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulation, embedded square or external round gauges, and optional brackets. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40010ALJC3WT 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar scale |
| Reflux valve | Not fitted |
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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | No reverse-flow valve (the default). |
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 the clamp cylinders of a machining or assembly fixture: the 5 um element keeps scoring-prone spool valves clean, the automatic drain clears condensate between shifts, and the low-pressure regulator holds the gentler clamping force the fixture was designed around.
Supplying the tape-head and flap-tuck cylinders of a carton sealer: filtered, regulated air at a reduced setting keeps the sealing action consistent, the automatic drain copes with condensate from a long compressed-air run, and the bar gauge lets the line operator verify supply at a glance.
Regulating air to a leak-test or actuator-qualification bench that runs well below standard shop pressure: the low-pressure type matches the reduced operating band, the 5 um grade protects sensitive test instrumentation, and the round bar gauge gives a direct reading for test records.
Size 400 with a 3/8 in NPT port sits in the middle of the GFR range: step up to size 600 or down to 300/200 depending on the flow your line needs - and because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. This unit already carries the two most consequential choices: the 5 um element (choose 40 um instead if your valves tolerate coarser air and you want the standard grade) and the automatic drain (choose manual if you prefer scheduled draining, or differential-pressure for the default behaviour). The low-pressure regulator type is the right pick when your circuit runs at reduced settings; we can confirm its exact setting range from the datasheet on request. The round gauge here reads in bar; MPa and psi scales and the embedded square gauge are the other published options. NPT is an order option alongside the PT standard and G (BSPP); this unit has no bracket, and brackets are optional across the family.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves, not as a single rated number, so we do not quote a l/min, SCFM or Cv figure here. Send us your application details and we will confirm the datasheet flow curve and whether this size 400, 3/8 in unit is correctly sized - on request, before you order.
The automatic drain expels condensate collected in the polycarbonate bowl on its own, so nobody has to bleed the bowl by hand - useful on lines that run continuously. The L in the code marks the low-pressure regulator type, intended for circuits that operate at reduced settings rather than full line pressure; its exact setting range is not published in our sheet, so ask us to confirm it from the datasheet.
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.