The AirTAC GFR300C08LNTK AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR300C08LNTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air with a 40 um element, then regulates downstream pressure, and this unit is the low-pressure type. The port is 1/4 in NPT thread. The polycarbonate bowl has a differential-pressure drain, the standard drain type for this series. No gauge is fitted on this configuration (code N), a reverse (check) valve is fitted (code K), and a mounting bracket is included.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options include automatic or manual drains, a 5 um filter element (code W), gauge choices, G (BSPP) or NPT thread in place of the standard PT, and a no-bracket version (code J). 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 sizing and datasheet figures for your application.
| Model | GFR300C08LNTK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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, regulated air to the cylinder circuit of a bench punch or small press: the 40 um element strips water and swarf carried in shop air before it reaches the valve stack, and the low-pressure type regulator is the version specified where the circuit runs at reduced settings.
A packaging line's case sealer and labeller cylinders need clean, steady air: this unit filters to 40 um and regulates the supply at the drop point, while the differential-pressure drain handles condensate collected in the polycarbonate bowl.
Pilot-scale test rigs and lab automation running actuators and small air cylinders at reduced pressure: the 1/4 in NPT port drops straight into the skid's air preparation panel, the included bracket gives a fixed mounting, and with no gauge fitted the panel's own instrumentation stays in charge.
The real choices on a GFR unit are the size and port, the drain type, the filter grade, the gauge and the thread. Size 300 with a 1/4 in port sits in the middle of the 200/300/400/600 range; step up or down according to the flow your line needs. Drains come as differential-pressure (this unit), automatic (A) or manual (M). The standard element is 40 um; specify W for a 5 um element where finer filtration is needed. Gauges are optional - this configuration has no gauge fitted - and can be specified with MPa, psi or bar scales. PT is the standard thread; G (BSPP) and NPT are order options, as on this NPT unit. Flow for the GFR series is published as curves, not a single rating, so send us your application details and we will confirm sizing against the datasheet before you order.
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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your inlet pressure, set pressure and expected air consumption and we will confirm the sizing from the datasheet on request.
No. The N in the code means no gauge is fitted on this configuration. Gauges are optional on GFR units - an embedded square gauge or an external round gauge, with MPa, psi or bar scales - and can be specified when ordering. This unit does carry a reverse (check) valve (code K) and includes a mounting bracket.
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.