The AirTAC GFR400C15LF3WTK 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 GFR400C15LF3WTK is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 configuration is built with 1/2 in NPT ports, a 5 um filter element (code W) for finer protection than the standard 40 um element, a differential-pressure drain, an embedded square gauge scaled in bar, a fitted reverse/check valve (code K), and the low-pressure regulator type (code L). It includes a mounting bracket, handles up to 1.0 MPa (145 psi) inlet pressure, and operates from -5 to 70 C in a non-freezing environment; the bowl on size 400 units is polycarbonate.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and offers manual, automatic or differential-pressure drains, 40 um or 5 um elements, an embedded square gauge or an optional external round gauge with MPa, psi or bar scales, and PT, G or NPT threads. AirTAC publishes flow only as curves rather than a single rated figure, so we confirm flow and other datasheet figures for your application on request.
| Model | GFR400C15LF3WTK 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 an assembly fixture where clamps and swing cylinders must run below standard line pressure, this filter regulator cleans the air with its 5 um element and holds the reduced setpoint, while the check valve keeps downstream pressure from bleeding back when the supply dips.
Fitted ahead of the directional valves and cylinders on a cartoning or wrapping line, the unit strips water and particulate from the shop air and regulates it to the pressure the machine's valve island was set up for, with the square bar gauge giving the operator a clear setpoint readout.
At a trimming or cleaning station running air knives at reduced pressure, the low-pressure regulator type sets the gentle pressure the job needs, the 5 um element protects nozzles from particulate, and the differential-pressure drain bleeds accumulated water without interrupting the line.
Step through the decodable choices: size 200, 300, 400 or 600 with ports from 1/8 to 1 in - this unit is size 400 with 1/2 in NPT, so match the size step to your required flow. Drain type: differential-pressure (standard, fitted here), automatic, or manual. Filter grade: 40 um standard or 5 um (code W, fitted here) where downstream valves and cylinders need finer protection. Gauge: the embedded square gauge is standard and an external round gauge is optional, with MPa, psi or bar scales - this unit carries the square gauge in bar. Thread: PT is the standard; G and NPT are order options, and this unit is NPT. The K code adds a reverse/check valve, and the L code selects the low-pressure regulator type, whose exact adjustment range is not published - we confirm it on request. Flow is published as curves, not a single rating, so 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 GFR series only as curves, not as a single rated figure, so we do not quote a number. Send us your application details - port size, downstream demand and working pressure - and we will confirm the datasheet curve and check the sizing for you on request.
L selects the low-pressure regulator type, whose exact adjustment range is not published in the material we hold - we confirm it on request. W selects the optional 5 um filter element instead of the standard 40 um. K means a reverse/check valve is fitted, which holds downstream pressure against supply-side drops. The unit otherwise carries the standard differential-pressure drain, an embedded square bar gauge, and a mounting bracket.
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.