The AirTAC GFR300C15LJC3WT AirTAC Filter Regulator NPT 1/2 in 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 series combines water and particulate filtration with pressure regulation in a single body. This unit is the 300 size with 1/2 in NPT ports (the T thread option; PT is the series standard), the 5 um filter element (code W, against the 40 um standard), a differential-pressure drain, the low-pressure regulator type, a round external gauge with bar scale, and no mounting bracket (code J). The metal bowl collects condensate, no reverse/check valve is fitted, and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options for drain type, filter grade, gauge style and scale, thread (PT, G or NPT) and bracket. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C15LJC3WT AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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, regulated low-pressure air to pneumatic clamps on a CNC fixture, with the 5 um element protecting the clamp valves from water and particulate and the bar gauge giving a local setpoint readout.
Sits ahead of the spray guns on a coating line, removing water and particles down to 5 um and holding the low, steady atomizing pressure the gun circuit calls for.
Supplies regulated air to low-pressure cylinders and actuators on a carton-forming or wrapping machine, with the differential-pressure drain bleeding collected condensate while the line runs.
The real, decodable choices on this series: step between sizes 200/300/400/600 to match the port and the flow your line needs; pick the drain (differential-pressure as fitted here, automatic, or manual); choose the 40 um standard element or the 5 um W grade fitted here; select the embedded square gauge as standard or an external round gauge in MPa, psi or bar scales (round, bar here); order PT, G or NPT threads (NPT here); and include or omit the bracket (omitted here). The L code marks the low-pressure regulator type - its exact adjustment range is not published in the standard listing, so confirm it with us. One honest note: AirTAC publishes flow as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm this 300 size with 1/2 in ports is right 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 rather than a single rated figure, so we do not quote a rated l/min, m3/h or SCFM number. Send us your required flow and working pressure and we will read the GFR300 curve for you and confirm the datasheet on request.
It marks the low-pressure regulator type. The adjustment range for the low-pressure version is not published in the standard listing, so we confirm the exact range from the AirTAC datasheet on request. The rest of the code decodes as the 5 um filter grade, differential-pressure drain, round bar gauge, no bracket and NPT 1/2 in ports.
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.