The AirTAC GFR300C15LF3WTK AirTAC Filter Regulator 1/2 in NPT 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 GFR300 is a filter regulator: one body removes water and particulate from the compressed air and regulates downstream pressure, with a drain bowl and no lubricator. This configuration is the 300 size with a 1/2 in NPT thread, the 5 um filter element (code W), the low-pressure regulator type (code L), the differential-pressure drain, a metal bowl, an embedded square gauge scaled in bar, a fitted reverse/check valve (code K) and a mounting bracket.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 to 1 in, and options across 40 um or 5 um filtration, differential-pressure, automatic or manual drains, MPa, psi or bar gauge scales, 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 we confirm the flow curve and the full datasheet for this model on request.
| Model | GFR300C15LF3WTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| Series | GFR300 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 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 | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Feeds filtered, low-pressure regulated air to spray guns and air-driven agitators on a finishing line, with the 5 um element and differential-pressure drain keeping water and particulate out of the finish.
Sits ahead of clamp cylinders on a machining fixture circuit where backflow from the downstream side is not wanted - the reverse/check valve (code K) is already fitted, and the regulator holds the set pressure at the fixture.
Supplies filtered, regulated air to cylinders and air jets along a packaging conveyor, with the 1/2 in NPT port and bracketed 300-size body dropping straight into the line's air-prep station.
Size and port: the 300 body sits mid-range in the GFR family (200/300/400/600), and this unit carries a 1/2 in NPT port - step up to 400/600 or down to 200 to match your line's flow demand and piping. Filtration: the W code fits the 5 um element; the 40 um standard element is the usual choice for general plant air. The L code makes this the low-pressure regulator type; its exact adjustment range is not published in the sheet we work from, so ask us to confirm it against your set point. Drain: the differential-pressure drain is the catalogue default, with automatic (A) and manual (M) as the alternatives. Gauge, thread and mounting: the square gauge here reads in bar (MPa and psi scales are options), PT is the standard thread with G and NPT as catalogue options, and the bracket is included.
One honest note before you order: AirTAC publishes GFR flow as curves, not as a single rated figure, so we do not quote a number here. Send us your application details and we will confirm sizing against the flow curve before you commit.
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 curves, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow curve and the full datasheet for GFR300C15LF3WTK on request before you order.
W selects the 5 um filter element instead of the 40 um standard element. Both are catalogue options on the GFR filter regulator: choose 5 um where downstream equipment needs finer filtration, and 40 um for general plant air. This unit also carries the L code for the low-pressure regulator type and K for the fitted reverse/check valve.
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.