The AirTAC GFR300C08ALF2TK 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 GFR300C08ALF2TK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This size 300 unit has a 1/4 in NPT port, a metal bowl with an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, and the low-pressure regulator type. A square pressure gauge with psi scale is fitted, a reverse/check valve is built in, and a mounting bracket is included. Maximum working (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 port sizes from 1/8 to 1 in, and catalogue options including manual or differential-pressure drains, a 5 um element (code W), G (BSPP) or NPT threads in place of the PT standard, and alternative gauge scales. The regulation range for the low-pressure type is not published as a single figure, and flow is published as curves rather than one rated number, so we confirm both from the datasheet on request before you order.
| Model | GFR300C08ALF2TK 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 spray guns and air-assisted applicators in a finishing booth, where the low-pressure regulator type holds a gentle, steady setting and the 40 um element and automatic drain keep water and grit out of the finish.
Supplying the low-pressure sealing and clamp cylinders on a carton or blister packaging line: the regulator keeps the sealing heads consistent while the automatic drain protects downstream valves from condensate carryover.
Point-of-use regulation on laboratory automation and analytical-instrument skids, where the compact 1/4 in NPT connection, psi gauge and built-in check valve give a tidy, protected low-pressure circuit.
The real choices on this family are the size and port step (200/300/400/600 against the flow your line needs), the drain type (automatic here; manual and differential-pressure are the alternatives), the filter element (40 um standard, 5 um where finer filtration is needed), the gauge and its scale (a square psi gauge is fitted here; MPa or bar scales and an external round gauge are options), the thread (NPT here; PT is the standard and G/BSPP is orderable), and the bracket. Flow is published as curves rather than a single rated figure, so send us your application conditions 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure and the flow your application needs and we will confirm sizing from the datasheet on request.
This unit carries code A, the automatic drain, which expels collected condensate from the bowl without anyone opening it - useful on lines that run unattended. Manual and differential-pressure drains are the catalogue alternatives in the same size if your maintenance routine suits them better.
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.