The AirTAC GFR400C10ALJF3WTK AirTAC Filter Regulator NPT3/8 is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet 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 GFR400C10ALJF3WTK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is built around a 3/8 in NPT port at size 400, with 5 um filtration (code W) for finer protection than the standard 40 um element, an automatic drain that expels collected condensate from the polycarbonate bowl without manual attention, and a low-pressure regulator type for circuits set below standard working ranges. A square pressure gauge scaled in bar is fitted, a reverse/check valve is included, 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.
This is a genuine AirTAC part from the G-series air-treatment line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options including manual, automatic or differential-pressure drains, 40 um or 5 um filtration, gauge scales in MPa, psi or bar, G (BSPP), NPT or PT threads, and brackets. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details against your application before ordering.
| Model | GFR400C10ALJF3WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Clean, regulated supply air for a small bench-mounted pneumatic press: the 5 um element keeps fine particulate out of the press valve, while the low-pressure regulator type suits circuits set below standard working pressure.
Point-of-use air preparation for packaging machine cylinders and grippers, where the automatic drain clears condensate from the bowl without an operator stopping the line to bleed it manually.
Air supply for a leak-test or low-pressure process fixture, where the regulator must hold a modest set point and the square bar gauge gives a direct, readable indication of the test pressure.
Choose the size and port step (200, 300, 400 or 600; 1/8 in to 1 in) against the air demand of the circuit - this unit is the size 400, 3/8 in step. Decide the drain: automatic (as here) for unattended or hard-to-reach installations, manual for simple periodic draining, or differential-pressure as the default. Pick the filter grade: 40 um standard or 5 um (W) where finer protection is needed - this unit carries the 5 um element. Select the gauge scale (MPa, psi or bar - this one is bar, square embedded type; an external round gauge is optional), and the thread: PT is the standard, with G (BSPP) and NPT as order options - this unit is NPT. Bracket J means no mounting bracket is supplied. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 flow for the G-series as curves, not as a single rated figure, so we do not quote a number on the page. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
L marks the low-pressure regulator type, for circuits set below the standard working range. The exact adjustment range for the low-pressure type is not published on our sheet, so ask us to confirm it from the datasheet before ordering.
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.