The AirTAC GFR400C15LJF3WT 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 GFR400C15LJF3WT is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a low-pressure regulator type for applications set well below standard line pressures. An embedded square gauge reading in bar is fitted, and no mounting bracket or reverse/check valve is included in this code.
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 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulation, and PT, G or NPT threads. Published flow data appears as curves rather than a single rated figure, so we confirm the exact curve and datasheet figures for your application on request.
| Model | GFR400C15LJF3WT 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 assembly fixtures where clamp cylinders must close at a gentle, repeatable set pressure, this low-pressure filter regulator lets the line operator dial in and hold the clamping force while the 5 um element keeps debris out of the valve stack.
Laboratory analysers, sample-handling panels and calibration benches need clean, steady air at modest pressures; the fine 5 um filtration and low-pressure regulation in one body protect sensitive pneumatic controls without a second component.
Diverters, pushers and gate cylinders on packaging and conveyor lines run for long shifts; the differential-pressure drain sheds condensate as air flows, and the bar-scale square gauge gives operators a visible setpoint at the station.
Size 400 with a 1/2 in NPT port sits in the upper-middle of the GFR range; step up to size 600 or down to 300 depending on the flow your line needs - we will check the published flow curve against your demand before you order. This unit carries the 5 um element (code W); if your application tolerates coarser air, the 40 um standard element is available in the same body. The drain is differential-pressure, which suits continuously flowing lines; ask for the automatic (A) or manual (M) variant if your duty cycle differs. The fitted square gauge reads in bar; MPa and psi scales are order options, and an external round gauge is also available. PT is the standard thread for this series, with G (BSPP) and NPT as catalogue options - this code specifies NPT. No mounting bracket is included with the J code; order the bracket version if you panel- or wall-mount. Note this is the low-pressure regulator type, so its adjustment range differs from the standard type - we confirm the exact range on request.
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 curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your line pressure, set pressure and expected air demand, and we will confirm the flow curve and the full datasheet for this exact model on request before you order.
The W in the code specifies the finer 5 um filter element instead of the 40 um standard, which suits actuators and instruments that see finer contamination as a problem. The L in the code selects the low-pressure regulator type, intended for setpoints well below standard line pressure; its exact adjustment range is not published on the standard sheet, so we confirm it on request. If you need standard-range regulation or the coarser element, the same size 400 body is available in those variants.
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.