The AirTAC AirTAC GFR400C15ALJC2K Filter Regulator PT1/2 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 GFR400C15ALJC2K is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single 400-size body. This configuration is a 1/2 in PT port unit with an automatic drain that expels condensate from the metal bowl without manual attention, a 40 um standard filter element, a low-pressure regulator type, a round pressure gauge reading in psi, and a built-in reverse (check) valve. No mounting bracket is fitted, so plan your panel or wall fixing accordingly.
This is a genuine AirTAC part from the G-series air-treatment range, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and PT, G (BSPP) or NPT threads. Filter grade (40 um standard, 5 um optional as code W), drain type, gauge style and scale, and bracket choice can all be ordered to suit the installation. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because flow is published as curves rather than a single rating, we confirm datasheet and sizing figures on request.
| Model | AirTAC GFR400C15ALJC2K Filter Regulator PT1/2 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) |
On a finishing line, spray guns need clean, dry air held at a reduced, steady pressure. This unit strips water and particulate that would spoil the finish, regulates the gun supply at low pressure, and its automatic drain keeps condensate off the booth floor during continuous shifts without an operator stopping to bleed the bowl.
Packaging machinery often runs actuation and sealing circuits at reduced pressure off a main 1/2 in drop. A filter regulator in one body saves panel space on the machine's valve stand, the 40 um element protects the valves, and the fitted reverse valve blocks backflow from the downstream side if the supply dips.
Conveyor systems use low-pressure air for hold-downs, diverters and cleaning jets. This unit filters the shop-air supply, holds the reduced set pressure the conveyor's cylinders and jets were designed around, and the psi gauge lets maintenance verify the setting at a glance during line checks.
The real choices in this family are the size and port step, the drain, the element grade, the gauge and the thread. Size 400 with a 1/2 in PT port suits lines with higher air demand than the 200/300 sizes; step up to size 600 or down to 300 if your piping and demand differ. The automatic drain on this unit handles condensate removal on its own, which suits unmanned or hard-to-reach installations; manual and differential-pressure drains are alternatives in the same series. The 40 um element is the standard grade - order the W variant if the application needs 5 um filtration. The round gauge here reads in psi; the embedded square gauge and MPa or bar scales are options, as are G (BSPP) and NPT threads and a mounting bracket.
This is the low-pressure (L) type, intended for circuits that run at reduced pressure; the exact adjustment range for the low-pressure version is not published, so ask us to confirm it against your set pressure before ordering. Flow for the GFR400 is published as curves, not a single rated figure - send us your demand and we will confirm sizing from 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 GFR400 as curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, set pressure and air demand, and we will confirm the sizing from the datasheet on request before you order.
The A in the code GFR400C15ALJC2K means an automatic drain, which expels collected condensate from the bowl without manual attention - useful on unmanned or hard-to-access installations. The same GFR400 series is also available with a manual drain (code M) or the differential-pressure drain (no code) if you prefer a different service approach.
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.