The AirTAC GFR300C15ALJC3WTK AirTAC Filter Regulator NPT1/2 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 GFR300C15ALJC3WTK is a GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is built on the 300 size with 1/2 in NPT ports, a 5 um filter element (code W), an automatic drain, and the low-pressure regulator type. A round gauge with a bar scale is fitted, a reverse/check valve is included, the metal bowl handles condensate collection, and the unit is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating 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 options from 1/8 to 1 in, PT as the standard thread and G or NPT available to order, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, and gauge or no-gauge builds. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300C15ALJC3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
Filtering and regulating air to the clamping cylinders on a machining fixture, where the low-pressure regulator type suits circuits that hold workpieces at reduced setpoints and the 5 um element protects the valve stack.
A single-body filter regulator ahead of the cylinder bank on a cartoning or case-packing line, with the automatic drain clearing condensate through long shifts and the round bar gauge giving operators a local pressure readout.
Conditioning shop air feeding spray guns in a paint booth: the 5 um element strips water and particulate that would ruin finishes, while the regulator holds a steady, low atomising pressure at the gun.
Start with size and port: the 200, 300, 400 and 600 sizes step up in port and flow capacity, and this unit sits at 300 with 1/2 in NPT ports. Choose the drain to match your maintenance routine: automatic (as fitted here) for unattended condensate removal, manual for scheduled checks, or the differential-pressure default. Pick 40 um for general line protection or 5 um (this unit) where finer filtration matters, and select the gauge scale - MPa, psi or bar. Thread is PT as standard with G and NPT as order options, and a mounting bracket can be specified where needed. Because flow is published as curves rather than a single rating, send us your application and we will confirm sizing against the datasheet before you order.
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 G-series 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 the flow and full datasheet figures for this unit on request before you order.
The A in the code fits an automatic drain, which expels collected condensate from the metal bowl without manual attention. The GFR family also offers manual (code M) and differential-pressure (blank) drains, and the regulator adjustment range depends on the drain type. This unit is the low-pressure regulator type, whose exact range we confirm on request. Tell us your maintenance preference and we will confirm the right build.
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.