The AirTAC GFR300C08ALJC1WT AirTAC Filter Regulator NPT 1/4 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 GFR300C08ALJC1WT is an AirTAC GFR300 filter regulator: a single body that removes water and particulate from compressed air and then regulates downstream pressure. This size 300 unit is threaded NPT 1/4 in and is built as the low-pressure type for circuits regulated below standard line pressure. It carries a 5 um filter element (the W grade, against the 40 um standard), and the automatic drain bleeds collected condensate from the polycarbonate bowl without operator attention. A round pressure gauge scaled in MPa is fitted so the set pressure can be read at a glance; no mounting bracket is included and no reverse (check) valve is fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and can be ordered with manual or differential-pressure drains, a 40 um or 5 um element, square or round gauges scaled in MPa, psi or bar, a reverse valve, G (BSPP) or NPT threads in place of the PT standard, and with or without a bracket. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08ALJC1WT AirTAC Filter Regulator NPT 1/4 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. |
|---|---|
| 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) |
Fixture clamps and swing cylinders on a CNC machining cell that hold parts at a reduced, repeatable pressure; the 5 um element keeps grit and water out of the clamp valves and the automatic drain clears condensate through the shift without operator attention.
Atomizing air to spray guns in a paint finishing booth, where the low-pressure type regulator suits circuits run at gentle settings and the round MPa gauge lets operators verify the set point before each batch; the automatic drain protects the gun air path from accumulated moisture.
Low-pressure air to web guides, idler rollers and threading jets on a textile processing line, where the 5 um element shields downstream control valves from particulate and the automatic drain keeps the bowl emptied during continuous running.
Size and port step up together: 200, 300, 400 and 600 correspond to ports from 1/8 in to 1 in, so match the size to the air your circuit consumes - we can check the published flow curves against your demand on request. This unit is already decoded as the low-pressure type with a 5 um element, automatic drain, round MPa gauge and NPT 1/4 in thread; if you need the 40 um standard grade, a manual or differential-pressure drain, a square gauge or a psi or bar scale, a reverse valve, G or PT threads, or a mounting bracket, those are decodable options within the same series. Keep the -5 to 70 C (non-freezing) temperature window and the 1.0 MPa (145 psi) maximum inlet pressure in view when placing the unit in your air preparation train.
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 rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and sizing against the datasheet on request.
It marks the low-pressure type of regulator. Standard GFR units cover the usual regulation span, while the L version is intended for circuits regulated at the lower end; the exact range for this type is not published in the catalogue, so confirm it with us before ordering if your set point is critical.
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.