The AirTAC GFR400-15LF2WT 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 GFR400-15LF2WT is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in one body with a single drain bowl. This configuration is built around a 1/2 in NPT port, the 5 um filtration grade (code W), a differential-pressure drain, and the low-pressure regulator type (code L). It is fitted with the embedded square gauge on a psi scale, has a polycarbonate bowl, and includes a mounting bracket.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um optional filtration, gauge scale options, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15LF2WT 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, psi 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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) |
Filtered, regulated air feeding clamp cylinders on a CNC fixture, where the 5 um grade protects the clamp valves from particulate carried in shop air and the regulator holds the clamping circuit at its set pressure.
A single filter-regulator conditioning the supply to carton-forming and sealing cylinders on a packaging line, giving one drain point and one pressure setting for the whole machine instead of a separate filter and regulator.
Conditioning air for the pop-up diverters, gates and stop cylinders along a conveyor system, where a compact filter-regulator at each station keeps water and debris out of the directional valves.
Size and port set the capacity: the 400 size with a 1/2 in port sits in the middle of the GFR range (200/300/400/600, 1/8 to 1 in), so step up or down against the air demand of the circuit. Drain type is a maintenance choice: differential-pressure (this unit) drains as pressure drops across the element, automatic drains on its own, manual only when opened. This unit carries the 5 um grade (W) instead of the 40 um standard - choose 5 um where downstream equipment is more sensitive to particulate. The regulator here is the low-pressure type (L); the standard GFR type adjusts 0.15-0.9 MPa (20-130 psi) with differential drain, while the exact range of the low-pressure type is not published, so ask us to confirm it. Gauge scale is psi on this unit (MPa and bar are the other options), the thread is NPT (PT is the standard; G and NPT are order options), and the bracket is included. 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 this series as curves rather than a single rated figure, so we do not quote a number here. Ask us to confirm the datasheet flow for your line pressure and conditions before ordering - we will provide the curve data on request.
L selects the low-pressure regulator type instead of the standard one. The standard GFR type adjusts 0.15-0.9 MPa (20-130 psi) with differential drain, but the exact adjust range of the low-pressure type is not published in the catalogue, so ask us to confirm it against your set pressure before ordering.
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.