The AirTAC GFR300C08ALJF3T AirTAC Filter Regulator NPT1/4 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 GFR300C08ALJF3T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure in one compact body. This size 300 unit is fitted with a 1/4 in NPT port, an automatic drain that ejects collected condensate without manual attention, and a 40 um standard filter element. The regulator is the low-pressure (L) type; the exact adjustment range for this variant is not published in the catalogue, so we confirm it on request. An embedded square gauge scaled in bar is included, the bowl is metal, and the unit is supplied without a mounting bracket or check valve. 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 from the GFR series, which covers four sizes (200, 300, 400 and 600) with ports from 1/8 to 1 in and PT, G (BSPP) or NPT threads. Across the series you can choose automatic, manual or differential-pressure drains, a 40 um or 5 um (W) element, gauge scales in MPa, psi or bar, and an optional bracket. Flow is published as curves rather than a single rating, so send us your application details and we will confirm sizing and datasheet figures before you order.
| Model | GFR300C08ALJF3T AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Point-of-use conditioning for a machine's valve and actuator panel: filtered, regulated air to the solenoid valves, with the automatic drain keeping condensate out of the control circuit.
Steady regulated air for the cylinders and grippers on a carton-forming or wrapping line, where the 40 um element protects seals and valve seats from water and debris.
Low-pressure regulated air for bench-top test rigs and lab automation that run below mainstream regulator ranges, with the bar-scaled square gauge for local setting.
The real, decodable choices in the GFR range are: size and port (200/300/400/600, stepping up in port from 1/8 to 1 in - match the step to your line's air demand); drain type (automatic as fitted here, manual, or the differential-pressure default); filter grade (40 um standard, 5 um with code W for finer particulate); gauge scale (MPa, psi or bar - this unit carries the square gauge in bar); thread (PT is the standard, with G and NPT as order options); and bracket (code J deletes it). Because AirTAC publishes flow only as curves and not as a single rated figure, ask us to check the curve for this size 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 performance curves rather than a single rated figure, so we do not quote a number here. Send us your application flow and pressure and we will confirm against the datasheet curve before you order.
The L code in GFR300C08ALJF3T means the regulator is the low-pressure type, intended for circuits set below mainstream regulator ranges. The exact adjustment range for this variant is not published in the catalogue, so we confirm it on request. The unit itself accepts up to 1.0 MPa (145 psi) inlet at -5 to 70 C, non-freezing.
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.