The AirTAC GFR300C15LJF3WT 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 GFR300C15LJF3WT is an AirTAC GFR300 filter regulator: a 5 um filter element and a pressure regulator combined in one body, sized for 1/2 in NPT ports. This unit is the low-pressure regulator type, so it is set up to hold a reduced downstream pressure rather than full line pressure; the exact adjustment range is not published and we confirm it from the datasheet on request. Water and particulate collect in the polycarbonate bowl, where the differential-pressure drain clears condensate automatically as operating conditions allow. The embedded square gauge reads outlet pressure in bar, and no mounting bracket or reverse/check valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, embedded square or optional external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so send us your application details and we will confirm sizing and the full datasheet on request.
| Model | GFR300C15LJF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Filtered, regulated air at a reduced downstream pressure holds the pneumatic clamps on a machining fixture without over-stressing the cylinders, while the 5 um element keeps fine particulate out of the clamp valves.
The 5 um filter section conditions air feeding spray guns on a finishing line, removing water and fine particles, while the low-pressure regulator holds the reduced gun pressure the finish specification calls for.
Low-pressure regulated air drives the sealing heads and hold-downs on a carton-sealing conveyor, with the differential-pressure drain clearing condensate carried in from the compressor line.
Choose the GFR size and port by the air demand of your line: 200, 300, 400 and 600 step up in port and flow capacity, and this model sits at size 300 with a 1/2 in NPT port. Drain type is a real choice: differential-pressure (the default, fitted here), automatic (A) or manual (M). Filter grade is 40 um standard or 5 um with the W code - this unit carries the 5 um element for finer protection. Gauges: the embedded square gauge is standard (bar scale here), an external round gauge is optional, and scales are MPa, psi or bar. Thread is PT as standard with G and NPT as order options - this unit is ordered in NPT. A mounting bracket is optional and this code (J) specifies none. Because flow is published as curves and 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 GFR300 flow as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure, required downstream pressure and air demand, and we will confirm the flow from the datasheet on request.
The L in the code marks the low-pressure regulator type, which is intended for reduced downstream pressures; AirTAC does not publish its exact adjustment range in the standard tables, so we confirm it from the datasheet on request. Standard-type GFR units carry the published range, which also depends on the drain type fitted.
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.