The AirTAC GFR400C10ALJNTK AirTAC Filter Regulator 3/8" 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 AirTAC GFR400C10ALJNTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit has a 3/8 in NPT port, a 40 um filter element, an automatic drain on its metal bowl, and the low-pressure regulator type. A reverse (check) valve is built in, no pressure gauge is fitted, 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. The GFR family is made in sizes 200, 300, 400 and 600, with a choice of PT, G or NPT thread, differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, gauge options and bracket variants. AirTAC publishes flow for these units as curves rather than a single rated figure, so ask us to confirm flow and datasheet details for your application before ordering.
| Model | GFR400C10ALJNTK AirTAC Filter Regulator 3/8" 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) |
Filtered, regulated air for the clamping cylinders on a machining fixture: the 40 um element protects the downstream valve stack, and the built-in check valve blocks reverse flow in the supply line.
Point-of-use air preparation for the gate and diverter cylinders on a sorting conveyor, with the low-pressure regulator holding the gate circuit below the main header pressure.
Filter regulation for a carton-sealing or wrapping machine, with the automatic drain venting collected condensate from the metal bowl so operators do not need a daily manual blow-down.
Size 400 with a 3/8 in NPT port suits circuits plumbed at 3/8 in; step up or down a GFR size if your ports or air demand differ. This variant has the automatic drain, so collected condensate is vented from the bowl without manual blow-down; manual and differential-pressure drains are the alternatives on other variants. Filtration is the 40 um standard element - choose the W variant if you need 5 um. No gauge is fitted on this code; gauge variants exist with different scale options. The thread here is NPT; PT is the AirTAC standard and G (BSPP) is also orderable. No mounting bracket is included. The regulator is the low-pressure type and its exact adjustment range is not published, so confirm it with us against your set pressure. Because flow is published as curves rather than a single rating, send us your flow and pressure conditions and we will confirm sizing 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 flow for GFR units as curves rather than a single rated figure, so we do not quote a rated flow number. Send us your line pressure, set pressure and expected air demand, and we will confirm the flow from the datasheet for this exact size 400, 3/8 in NPT configuration.
This variant is ordered without a gauge (code N). GFR variants are available with an embedded square gauge or an external round gauge, with MPa, psi or bar scales. If you want a gauge on this size and port, ask us for the equivalent gauge-fitted model code.
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.