The AirTAC GFR300C08ALNTK 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 AirTAC GFR300C08ALNTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit is threaded NPT 1/4 in, carries the standard 40 um filter element, and drains condensate automatically, so the bowl empties without manual attention. The regulator is the low-pressure type, a reverse (check) valve is fitted, and no pressure gauge is supplied. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The bowl on this size is polycarbonate.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, threads (PT standard; G and NPT as order options), drain types, filter grades (40 um standard, 5 um optional) and gauge options. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08ALNTK 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) |
Filtering and regulating the air supply to pneumatic clamps on a packaging line, where the low-pressure regulator sets a gentle clamp force and the 40 um element keeps water and debris out of the clamp cylinders and valves.
Conditioning air for gripper cylinders and control valves on a robot cell: filtered, regulated supply at the cell drop, with the automatic drain handling condensate and the check valve blocking reverse flow back into the line.
Supplying low-pressure regulated air to instruments and pneumatic test rigs, where clean, moisture-free air protects sensitive equipment and the fitted check valve prevents backflow into the bench supply.
Choose the size and port against the air consumption of the circuit: this unit is size 300 with a 1/4 in NPT port, and larger sizes carry larger ports and more flow. Drain options are differential-pressure (the default), automatic (as fitted here) and manual. Filter grade is 40 um standard; specify W for the 5 um element where finer filtration is needed. Gauge options include an embedded square gauge or an external round gauge with an MPa, psi or bar scale; this configuration is supplied without a gauge. Thread is PT as standard, with G (BSPP) and NPT as order options, and a mounting bracket is included. Because flow is published as curves rather than a single rated figure, 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 this family as curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote. Tell us your application and air consumption and we will confirm the correct size and the flow figures from the datasheet on request.
No. The N in the code means no gauge is fitted. If you need one, GFR units can be specified with an embedded square gauge or an external round gauge, with an MPa, psi or bar scale - just ask and we will quote the gauge-equipped variant.
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.