The AirTAC GFR300C08ALF2T 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 GFR300C08ALF2T is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a 1/4 in NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a low-pressure regulator type, and a square pressure gauge reading in psi. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The metal bowl on this unit is drained automatically, and the unit includes a mounting bracket.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard; G and NPT as ordered options), and reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and flow figures for your application on request.
| Model | GFR300C08ALF2T 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) |
On a carton-sealing or blister line, this unit filters the shop air feeding the sealing cylinders and holds the reduced working pressure they need, with the automatic drain keeping condensate out of the valves between shifts.
Feeding spray guns or coating applicators, the 40 um element strips water and particles that would ruin finish quality, while the low-pressure regulator type sets the gentler supply pressure such equipment calls for.
On CNC clamping and workholding circuits, the unit cleans the supply air ahead of the directional valves and regulates clamp pressure from the square psi gauge, with the bracket mounting it beside the manifold.
Size and port: the 300 size with a 1/4 in NPT port suits lines whose supply plumbing is 1/4 in; step up to 400 or 600 where flow demand is higher, since larger sizes carry larger ports. Drain: this unit has an automatic drain, which suits unattended or hard-to-reach installations; manual and differential-pressure drain versions exist for other duty patterns. Filtration: 40 um is the standard element; specify the W option for 5 um where finer protection is needed. Gauge: the embedded square gauge here reads psi; MPa and bar scales and an external round gauge are alternatives. Thread: this unit is NPT; PT is the standard thread and G (BSPP) is also a catalogue option. A mounting bracket is included.
One honest note before you order: flow for this family is published as curves, not as a single rated figure, so send us your application details and we will confirm sizing and the datasheet figures before you commit.
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 number we can honestly quote. Send us your application details and we will confirm the flow curves and datasheet figures for this exact unit on request.
The A in the code sets the automatic drain: collected condensate is ejected from the metal bowl without anyone opening it, which suits installations that run unattended or sit where a manual drain is awkward. Manual-drain and differential-pressure-drain versions of the same size are available if your maintenance routine prefers them.
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.