The AirTAC GFR40015LF1WTK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR40015LF1WTK is an AirTAC GFR400 series filter regulator: water and particulate filtration plus pressure regulation in a single body, sized for 1/2 in NPT ports. This configuration carries the 5 um filter element (code W) for finer air cleaning than the standard 40 um grade, the low-pressure regulator type (code L) for circuits that run below standard regulator ranges, a differential-pressure drain that bleeds accumulated condensate automatically whenever the pressure differential across the element is high enough, an embedded square pressure gauge reading in MPa, and a built-in reverse/check valve (code K) that holds downstream pressure if the upstream supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 400 frame; only the 600 size uses an aluminium alloy bowl. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans four frame sizes (200, 300, 400, 600) covering ports from 1/8 in to 1 in, with manual, automatic or differential-pressure drains, 40 um or 5 um elements, standard or low-pressure regulation, square or optional external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. AirTAC publishes flow for this series as curves rather than a single rated figure, so we confirm the flow and datasheet figures for your application on request before you order.
| Model | GFR40015LF1WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Fitted (reverse flow permitted) |
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. |
| 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 machining fixture line that clamps workpieces with air actuators running at reduced pressure, this filter regulator cleans the supply to 5 um, regulates it in the low-pressure band, and the check valve holds the clamp pressure if the main supply drops.
Feeding cylinders and air jets on a carton-sealing conveyor, the unit strips water and fine particles from the shop air, keeps the working pressure steady through the shift, and the differential-pressure drain clears condensate without operator attention.
On a laboratory sample-handling machine with sensitive pneumatic components, the 5 um element protects valves and actuators from fine contamination while the low-pressure regulator type sets the gentle working pressure the mechanism requires.
Start with the port step: the 400 frame at 1/2 in sits above the 300 frame at 3/8 in and below the 600 frame at 3/4 in and 1 in, so pick the size whose flow curve covers your demand with margin. Choose the element grade to match the air quality the downstream equipment needs: 40 um is the standard grade and the 5 um element (W) on this unit suits finer protection. The differential-pressure drain on this unit needs no operator attention and no separate drain signal; choose the automatic drain for continuous condensate rejection or the manual drain where an operator drains on a schedule. The low-pressure regulator type (L) is the right choice when the working circuit sits below the span of a standard regulator; its exact adjustment range is not published in our sheet, so confirm it with us. The embedded square MPa gauge is fitted here; an external round gauge in MPa, psi or bar is optional. Thread is NPT on this unit, with PT (standard) and G also orderable. A bracket is included, and the K code means the reverse/check valve is already fitted.
One honest note on sizing: AirTAC publishes flow for the GFR series only as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the sizing against the datasheet curve before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves rather than a single rated figure, so we do not quote a flow number here. Send us your operating pressure and air demand and we will confirm the sizing from the datasheet curve on request before you order.
The L code makes this a low-pressure regulator type, intended for circuits whose working pressure sits below the span of a standard regulator; the exact adjustment range is not published in our sheet, so confirm it with us. The K code means a reverse/check valve is fitted, which holds downstream pressure if the upstream supply is interrupted. This unit also carries the 5 um element, a differential-pressure drain, an embedded square MPa gauge, an included bracket, and NPT threads.
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.