The AirTAC GFR400C10ALJF2WTK AirTAC Filter Regulator NPT3/8 5um 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 AirTAC GFR400C10ALJF2WTK is a size 400 filter regulator: water and particulate removal plus pressure regulation combined in one body. This configuration carries a 3/8 in NPT port, a fine 5 um filter element (code W), an automatic drain that clears collected condensate without manual attention, and a low-pressure regulator type for applications set well below standard line pressures. It ships configured with the embedded square gauge scaled in psi and a reverse/check valve fitted, and no mounting bracket.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) with port options from 1/8 to 1 inch, thread choices of PT (standard), G and NPT, drain types, 40 um or 5 um filtration, and MPa/psi/bar gauge scales. Max working pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR400C10ALJF2WTK AirTAC Filter Regulator NPT3/8 5um |
|---|---|
| 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) |
On a CNC machining centre where clamp cylinders must hold at a setpoint well below standard shop-air pressure, this low-pressure type GFR regulates the clamp circuit while the 5 um element keeps spool and seal contamination out of the fixture valves.
Coating lines need clean, moisture-limited air regulated to a modest pressure before the applicator. The 5 um filtration protects the gun's air motor, the automatic drain keeps condensate off the finish, and the psi gauge lets the operator verify the setting at a glance.
Gripper and pusher cylinders on a bottling conveyor run continuously and are sensitive to dirt and water carry-over. This unit filters the supply to 5 um, holds the actuator pressure steady, and its reverse/check valve helps hold the circuit if upstream supply dips.
Size and port are the first decision: the 400 frame with its 3/8 in NPT port suits lines running above the 300-series flow band, but because AirTAC publishes flow as curves rather than a single rated figure, ask us to check the curve against your consumption before ordering. This unit is already fixed as the low-pressure type with a 5 um element, automatic drain, square psi gauge and reverse/check valve, so the remaining open choices are thread (PT is the catalogue standard; G and NPT are order options) and bracket, which this code omits.
If your circuit needs coarser 40 um protection, a manual or differential-pressure drain, a different gauge scale, or a bracket, a different GFR400 code covers it - we can identify the exact variant. For the low-pressure regulator type the exact adjustment range is not published in the material we hold, so we confirm it on request alongside the flow curve.
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 GFR400 series as performance curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your operating pressure and air consumption and we will confirm the sizing from the datasheet curve on request before you order.
Both are decoded from the model code: A is the automatic drain, which expels collected condensate by itself instead of relying on the default differential-pressure drain or manual draining, and W selects the fine 5 um element over the 40 um standard. Choose this code when the downstream equipment is contamination-sensitive and the unit is mounted where regular manual draining is impractical.
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.