The AirTAC GFR40010LJC3WTK 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 GFR40010LJC3WTK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for low-pressure circuits, with a fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a reverse/check valve fitted to hold downstream pressure when the supply is interrupted. The external round gauge is scaled in bar, the 3/8 in port is NPT thread, and the unit is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT as order options), bracket and reverse valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application before ordering.
| Model | GFR40010LJC3WTK 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. |
| 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. |
| 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) |
Fixture clamps and swing cylinders on an assembly cell that are specified to run at reduced pressure get both clean, dried air from the 5 um element and a stable low-pressure setting from the low-pressure regulator, with the check valve holding the clamp position if supply drops.
Pick-and-place and carton-closing cylinders on a packaging line take their air through this unit: water and fine dirt are stripped out before they reach the valve seals, and the differential-pressure drain keeps condensate off the machine floor without operator attention.
A laboratory pilot plant or component test stand running pneumatic instruments at low pressure uses this filter regulator to condition the shop-air feed, with the bar-scaled round gauge giving a clear local reading at the bench.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range: step up to size 600 or down to 300 depending on the flow your line needs - we will confirm the flow curve against your demand. This unit is the low-pressure type (code L), intended where downstream settings sit below the standard regulator range; because the exact adjustment range for the low-pressure type is not published in the sheet we work from, ask us to confirm it. The 5 um element (W) suits finer air-quality needs than the standard 40 um; the differential-pressure drain needs no manual attention but the bowl must not freeze. The round gauge here reads in bar (scale 3); embedded square gauges and MPa/psi scales are alternatives. NPT is the thread on this code - PT is the catalogue standard and G is also orderable. No bracket is included (code J), so plan your own mounting. We confirm all flow and datasheet figures on request 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 number, so we do not quote a l/min or SCFM figure here. Send us your line pressure and required downstream flow and we will confirm the sizing from the datasheet on request before you order.
In the code GFR40010LJC3WTK, C3 selects the optional external round gauge with a bar scale (an embedded square gauge with MPa/psi/bar scales is the standard alternative), and K specifies a reverse/check valve fitted, which holds downstream pressure if the upstream supply is lost. The L code marks it as the low-pressure regulator type - ask us to confirm its adjustment range, and note that J means no mounting bracket is included.
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.