The AirTAC GFR300C08LJF1T 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 GFR300C08LJF1T is a filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 300 unit has a 1/4 in NPT port (the T in the code), the standard 40 um filter element, and a polycarbonate bowl with a differential-pressure drain, so condensate is discharged in response to the pressure differential without a manual drain fitting. The regulator is the low-pressure type (L), an embedded square gauge graduated in MPa is fitted, and no mounting bracket is included. 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. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and can be ordered with a 5 um element (code W), automatic or manual drain, psi or bar gauge scales, an external round gauge, G (BSPP) or NPT threads in place of the PT standard, and a mounting bracket. Flow is published as curves rather than a single rated figure, so send us your application and we will confirm the figures from the datasheet on request.
| Model | GFR300C08LJF1T 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) |
Filtering and regulating the air feeding pneumatic clamps on a carton-sealing line, where the low-pressure regulator type suits circuits run at reduced supply pressure and the drain keeps condensate out of the clamp valves.
Conditioning shop air ahead of the torch circuit on a plasma cutting table, removing water and scale that cause erratic arc starting while the gauge gives the operator a direct pressure reference at the machine.
Supplying filtered, pressure-adjusted air to spray guns in a finishing booth, where water in the line causes fisheyes in the finish and the fitted MPa gauge lets the painter set and check the gun supply at a glance.
The real choices on this family: step up or down a size (200/300/400/600) to match the port and the duty your line needs - the port here is fixed at NPT1/4; choose the drain type (differential-pressure as fitted here, automatic, or manual); choose the 40 um standard element or the 5 um W grade for finer filtration; and choose the gauge scale MPa (as fitted), psi or bar. Thread is NPT on this unit; G (BSPP) and PT are the other catalogue options, and a mounting bracket can be added.
One honest note before you order: AirTAC publishes flow for this series as curves, not as a single rated figure, and the adjustable range of the low-pressure regulator type is not stated in the material we hold. Ask us to confirm both 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, not as a single rated number, so we do not quote a figure here. Send us your line pressure, downstream demand and port size and we will confirm the flow from the datasheet on request.
It marks the low-pressure regulator type. The exact adjustable range for the low-pressure version is not published in the material we hold, so we confirm it from the datasheet on request. If you need the standard-pressure version instead, order the equivalent code without the L.
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.