The AirTAC GFR400C10ALJC3WTK AirTAC Filter Regulator 3/8 in NPT 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 GFR400C10ALJC3WTK is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is the size 400 unit with 3/8 in NPT ports, the low-pressure regulator type (code L), a 5 um filter element (W), an automatic drain (A) that expels collected condensate without manual attention, a round external gauge reading in bar (C3), a reverse/check valve (K) fitted, and no mounting bracket (J). Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The bowl on the 400 size is polycarbonate; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 to 1 in, and each size can be ordered with manual, automatic or differential-pressure draining, a 40 um or 5 um element, standard or low-pressure regulation, different gauge styles and scales, G (BSPP), NPT or PT threads, and with or without a bracket. Flow for this family is published as curves rather than a single rated figure, so send us your application and we will confirm the sizing and full datasheet figures on request.
| Model | GFR400C10ALJC3WTK AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| 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) |
Feed the clamp cylinders of a robotic welding cell through this unit: the 5 um element keeps contamination out of the fixture valves, while the low-pressure regulator holds a gentle, repeatable clamp force and the check valve stops downstream air from feeding back toward the supply.
On a carton-packing conveyor, the automatic drain clears accumulated condensate without an operator walking the line, and the round bar gauge lets the technician verify supply pressure at a glance before each shift.
Supply bench-top lab apparatus or analytical instruments that need clean, low-pressure air: the 5 um grade polishes particulate from the shop supply and the regulator holds a stable, low set point for sensitive equipment.
Size 400 with 3/8 in NPT ports sits in the middle of the GFR range (200/300/400/600); step up or down a size when the flow curve for your line calls for it. This unit is the low-pressure regulator type, intended where the working pressure is below what a standard GFR is set up for; the exact adjustment range is not published, so confirm it with us before ordering. The 5 um (W) element gives finer filtration than the 40 um standard, and the automatic drain (A) handles condensate without daily manual attention - manual and differential-pressure drains are alternatives on other variants. The round gauge reads in bar; an embedded square gauge with MPa or psi scales can be ordered instead. NPT is an order option - PT is the catalogue standard thread and G (BSPP) is also available. No mounting bracket is fitted (code J); bracketed variants exist. Flow is published as curves, not a single rating, so 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. 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 rather than a single rated figure, so we do not quote a l/min or SCFM number here. Send us your application details and we will confirm the flow curve and correct sizing from the datasheet on request.
The L code marks the low-pressure regulator type, intended where the working pressure sits below what a standard GFR is set up for. Its exact adjustment range is not published in the catalogue, so confirm the range with us before ordering. If your line runs at ordinary shop pressures, the standard GFR400 variant is the simpler choice.
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.