The AirTAC GFR400C15LJC3WT AirTAC Filter Regulator NPT1/2 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 AirTAC GFR400C15LJC3WT is a 400-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/2 in NPT ports, a 5 um filter element (code W) for finer filtration than the 40 um standard, a differential-pressure drain that bleeds condensate automatically whenever the pressure differential across the element is high enough, and low-pressure regulation for circuits that run below standard regulator settings. It is fitted with an external round gauge scaled in bar, has no reverse/check valve, and ships without a mounting bracket. The polycarbonate bowl suits the 400 frame, and the unit handles a maximum inlet pressure of 1.0 MPa (145 psi) at temperatures from -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR range is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, standard or low-pressure regulation, gauge style and scale options, and PT, G or NPT threads. Flow for this unit is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400C15LJC3WT AirTAC Filter Regulator NPT1/2 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 fixture-clamping manifold that holds workpieces at reduced air pressure, this filter regulator cleans the supply to 5 um and holds the low setting the clamps were set up for, with the bar-scale gauge giving the operator a direct reading at the station.
At a 1/2 in drop feeding carton-sealers and wrap stations on a packaging conveyor, the unit strips water and fine particulate before the directional valves and regulates the header pressure down to what the actuators need.
On a laboratory compressed-air ring main serving bench outlets and small pneumatic apparatus, the 5 um element protects sensitive apparatus from particles and condensate while the low-pressure regulator trims the supply to what the bench work requires.
Start with the port step: this unit is 400 size with 1/2 in NPT ports, one step up from the 300 frame, so size up if your line sits between frames. Filtration here is the 5 um element (code W) rather than the 40 um standard - choose 5 um when downstream valves, cylinders or instruments are sensitive to finer particles. The drain is differential-pressure, which discharges condensate on pressure differential without operator attention; automatic (A) and manual (M) drains are available in the family if you prefer. The gauge is the external round type scaled in bar; embedded square gauges and MPa or psi scales are the other catalogue options. Thread is NPT here, with PT (standard) and G also orderable, and the J code means no mounting bracket is included. Regulation on this code is the low-pressure type; its exact adjustment range is not published in our sheet, so confirm it with us. Note that flow is published as curves, not a single rating - ask us to confirm sizing against your application before ordering.
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. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
The L code makes this a low-pressure regulator rather than the standard type; its exact adjustment range is not published in our sheet, so confirm it with us before ordering if your circuit runs at very low settings. The gauge fitted on this code is the external round type scaled in bar; square embedded gauges and MPa or psi scales are available as catalogue options.
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.