The AirTAC GFR300C08AF2 AirTAC Filter Regulator, PT1/4, Auto Drain 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 GFR300C08AF2 is an AirTAC GFR300 filter regulator: filtration (water and particulate removal) and pressure regulation combined in a single body, with a 1/4 in PT port. This configuration carries a 40 um standard filter element, an automatic drain that discharges collected condensate without manual intervention, and an embedded square gauge reading in psi. The standard regulator adjusts from 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C (non-freezing). The size 300 bowl is polycarbonate (PC), a mounting bracket is included, and no reverse/check valve is fitted.
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 a 5 um element (code W), manual or differential-pressure drain, G (BSPP) or NPT threads, alternative gauge scales, and a reverse/check valve. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request.
| Model | GFR300C08AF2 AirTAC Filter Regulator, PT1/4, Auto Drain |
|---|---|
| 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) |
Point-of-use air preparation ahead of a directional valve manifold on an automated clamp or small press: the 40 um element keeps water and particulate out of the valve seals while the regulator holds a stable set pressure to the stack.
Filtering and regulating the supply to cylinders and stopper gates on a cartoning or filling conveyor, where the automatic drain handles condensate on a line that runs through shifts without daily manual draining.
A filter regulator at the drop from the shop-air ring main to an assembly workstation, setting a safe, fixed working pressure for air tools and small actuators while the psi gauge gives operators a visible line check.
Size and port: the GFR300 steps up from the 200 series with a 1/4 in PT port; match the size step to the flow your line needs and step to 400 or 600 for larger demand. Drain: this unit is the automatic-drain variant, suited where condensate should be discharged without daily attention; manual and differential-pressure drain versions exist in the series. Filter grade: 40 um is standard here; specify the W option for 5 um where finer particulate removal matters. Gauge: the embedded square gauge with psi scale is fitted, and MPa or bar scales plus an external round gauge are orderable. Thread: PT is the standard; G (BSPP) and NPT are catalogue options to order. A bracket is included, and a reverse/check valve can be specified on other variants. Flow for the GFR300 series is published as curves, not a single rating, so 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 the GFR300 series as curves rather than a single rated figure, so no rated flow number is quoted here. Contact us and we will confirm the flow from the datasheet against your application before you order.
This configuration is the automatic-drain variant (code A): collected condensate is discharged without someone opening the drain by hand. The GFR300 series is also available with manual drain or with the differential-pressure drain as the default arrangement, so you can match the drain to how the unit is attended.
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.