The AirTAC GFR400C10ALJF2TK AirTAC Filter Regulator NPT3/8 Low-Pressure 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 GFR400C10ALJF2TK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration carries a 3/8 in NPT port, a 40 um standard filter element and an automatic drain that discharges collected condensate without manual attention. It is the low-pressure regulator type, fitted with an embedded square gauge scaled in psi and a reverse/check valve, and it is supplied without a mounting bracket.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, an optional 5 um element, gauge and thread options, and optional brackets. Maximum working (inlet) 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 ask us to confirm flow and datasheet figures for your application.
| Model | GFR400C10ALJF2TK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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) |
A low-pressure clamping circuit on a CNC fixture needs clean, moisture-picked air held at a gentle, stable setting; this unit filters the supply, regulates the clamp pressure, and its automatic drain keeps condensate off the fixture between cycles.
Diaphragm-actuated control valves on a process line depend on clean, low-pressure pilot air; the 40 um element protects the positioner, the check valve holds the pilot circuit through momentary supply dips, and the psi gauge gives operators a direct reading.
A packaging line's valve manifold and sensor cluster take air from a compact point-of-use panel; this single-body filter regulator fits the panel, the automatic drain suits a machine that runs unattended, and the omitted bracket allows direct panel mounting.
Start with the port step: this unit is size 400 with a 3/8 in NPT port, one step up from the 1/4 in size 300 - match the size to the air demand of the circuit rather than the pipe alone. The drain choice matters in service: automatic drain (this configuration) suits unattended or hard-to-reach installations, manual drain suits routinely checked points, and the differential-pressure default suits standard drops. The 40 um element is the standard grade; specify the W code if the application needs the 5 um fine grade. The square gauge here is scaled in psi; MPa and bar scales are available. Thread is NPT on this unit, with PT (standard) and G (BSPP) as orderable alternatives, and the bracket is omitted (J code) where panel or existing mounting is used. Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet 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 the GFR series as curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your application and we will confirm the flow and datasheet figures for this exact unit on request before you order.
The L in the code marks the low-pressure regulator type, intended where the downstream setting sits below what a standard regulator is tuned for. Its exact adjustment range is not published in the material we hold, so we confirm it on request. The rest of the decode is standard: NPT3/8 port, automatic drain, 40 um element, square psi gauge and a fitted check valve.
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.