The AirTAC GFR400-15LJF1WT AirTAC Filter Regulator NPT1/2, 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" 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 GFR400-15LJF1WT is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a differential-pressure drain that bleeds condensate automatically under flow, and an embedded square gauge scaled in MPa so the set pressure is visible at the unit. It is the low-pressure (L) type, intended for circuits regulated well below the standard range, and it 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 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, 40 um or 5 um elements, standard or low-pressure regulation, square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-15LJF1WT AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, MPa 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 15 | Port size PT1/2". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
On a pneumatic press or fixture where workpieces must be held at a gentle, closely controlled clamping pressure, this low-pressure filter regulator cleans the supply and holds the reduced set point, with the MPa gauge showing the setting at the unit.
Feeding cylinders and actuators on a packaging or bottling conveyor line, the 5 um element protects directional valves from fine particulate while the regulator sets a stable reduced pressure for consistent machine cycling.
Supplying test rigs, pneumatic gauges or analytical bench equipment that needs clean, finely filtered air at a low regulated pressure, with the differential-pressure drain keeping condensate off the instruments during continuous operation.
Start with the port step: this unit is size 400 with a 1/2 in NPT port, the right choice when your supply line is 1/2 in and your flow demand sits in the upper mid-range of the GFR family. Because flow is published as curves rather than a single rating, ask us to check the curve for the GFR400 against your actual air consumption before ordering. The 5 um element (code W) suits downstream equipment that needs finer filtration than the standard 40 um grade; if your application tolerates coarser filtration, the standard grade is the default. The differential-pressure drain works automatically while air flows, which suits continuously running lines; an automatic (A) or manual (M) drain is available if you prefer a different condensate strategy. This is the low-pressure (L) type - confirm its regulation span against your set point with us, as the exact range is not published. The square gauge is scaled in MPa; psi or bar scales and an external round gauge can be ordered. PT is the standard thread and G or NPT are order options - this unit is built with NPT. A mounting bracket is optional (this configuration omits it).
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 performance curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your line pressure and air consumption and we will confirm the GFR400 curve and sizing against your application on request before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits regulated well below the standard range; its exact regulation span is not published, so confirm your set point with us. The W code selects the 5 um filter element instead of the standard 40 um grade, giving finer filtration for sensitive downstream equipment.
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.