The AirTAC GFR300C08ALJNWT 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 GFR300C08ALJNWT is a filter regulator: it removes water and particulate from compressed air and holds a reduced, regulated pressure downstream, in one body. This 300-size unit is threaded NPT1/4 (1/4 in), carries a 5 um filter element (the finer of the two published grades), and drains condensate automatically, so the bowl does not need manual attention. The regulator is the low-pressure type; its exact adjustment range is not published, so we confirm it against your set pressure on request. No gauge is fitted and no mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the bowl is metal.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and is offered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge options and G/NPT thread variants. Published flow data for this series is given as curves rather than a single rated figure, so send us your flow requirement and we will confirm sizing and the full datasheet before you order.
| Model | GFR300C08ALJNWT 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) |
Feeding filtered, reduced-pressure air to the hot-melt applicator valves on a packaging line, where the low-pressure regulator type and 5 um element keep the applicators supplied with clean, steady air.
Conditioning supply air to pneumatic clamps on a machining fixture: the 5 um element screens fine particulate before the clamp cylinders, and the automatic drain empties condensate without operator rounds.
Supplying clean, regulated air to the pilot valves of a benchtop bottling or dosing rig, where a compact 1/4 in filter regulator sits directly at the point of use.
The decodable choices on this series are real ones. Step up or down in size (200/300/400/600) to match the port and the flow your line needs - the 300 size here takes a 1/4 in port. Choose the drain: automatic (as fitted here) for unattended condensate removal, manual for periodic draining, or differential-pressure as the default. Pick the element grade: 40 um standard, or 5 um (this unit's W grade) where downstream valves and cylinders need finer protection. Thread is PT as standard, with G (BSPP) and NPT as order options - this unit is NPT. Bracket and gauge are selectable; this configuration has neither. Flow for the series is published as curves, not a single rating, so 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 flow for the GFR series as curves rather than a single rated figure, so there is no one rated flow number to quote. Send us your line pressure, set pressure and air consumption and we will confirm the flow from the datasheet for this exact NPT1/4, 5 um configuration before you order.
This unit carries the A drain code: condensate is discharged automatically from the metal bowl, so no one has to bleed it by hand. The same 300-size filter regulator is also available with a manual drain or the differential-pressure default, and with a 40 um element instead of the 5 um fitted here - tell us which you want when ordering.
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.