The AirTAC GFR300C08ALJF2T 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 GFR300C08ALJF2T is a filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 300 unit carries a 1/4 in NPT port, an automatic drain that clears condensate from the metal bowl without manual attention, and the standard 40 um filter element. The regulator is the low-pressure type, and an embedded square gauge with a psi scale is fitted. No reverse (check) valve is fitted and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans 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 or 5 um (W) elements, PT, G or NPT threads, and bracket or no-bracket mounting. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application.
| Model | GFR300C08ALJF2T 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 air preparation for a small pneumatic press or clamping fixture on a production line, filtering condensed water and pipe debris from the supply while the low-pressure regulator type holds the circuit at a reduced working pressure - confirm the exact range with us.
Conditioning the air at a packaging machine drop on a conveyor line: the 40 um element strips water and particulates before they reach valves and cylinders, and the automatic drain keeps the bowl clear between shifts with no operator input.
Filtered, regulated supply for a leak-test or instrument bench plumbed in 1/4 in NPT lines, where the fitted square gauge gives a direct local psi readout and the low-pressure regulator type suits circuits run below standard mains settings.
Step the size and port against the air demand of the circuit: sizes 200, 300, 400 and 600 step up in port and flow capacity - this unit is size 300 with a 1/4 in NPT port. Pick the drain to suit maintenance: automatic (as fitted here) ejects condensate on its own, manual needs an operator, and the differential-pressure default drains only once the element is loaded. Filter grade is 40 um standard; specify the W code for the 5 um element where finer particulate capture matters. The embedded square gauge is standard with MPa, psi or bar scales, and an external round gauge is optional. Thread: PT is the standard, with G (BSPP) and NPT as order options - this unit is NPT. The J code omits the mounting bracket. This is the low-pressure regulator type; its exact adjustment range is not published, so confirm it with us. Flow is published as curves, not a single rating - ask us to check 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 we do not quote a l/min or SCFM number here. Send us your inlet pressure, set pressure and expected air consumption, and we will confirm the sizing from the datasheet before you order.
The A code fits an automatic drain that ejects collected condensate from the metal bowl on its own - useful on lines that run unattended. The GFR family is also ordered with a manual drain (M) or the differential-pressure default, and the 5 um W filter element, alternative gauge scales (MPa/psi/bar), an external round gauge, G or NPT threads and bracket mounting are all order options.
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.