The AirTAC GFR300C08ALF2W AirTAC Filter Regulator, PT1/4, 5 um 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 GFR300C08ALF2W is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is threaded PT1/4 (1/4 in), carries a 5 um filter element (code W) for finer filtration than the 40 um standard, and has an automatic drain that ejects collected condensate from the metal bowl without manual attention. The embedded square gauge reads in psi, and the L in the code makes this the low-pressure regulator type for circuits that run at reduced regulated pressure. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating 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 ports from 1/8 to 1 in, and options across the range include manual or differential-pressure drains, the 40 um standard element, square or round gauges with MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. 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 | GFR300C08ALF2W AirTAC Filter Regulator, PT1/4, 5 um |
|---|---|
| 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 sealing and labeling heads on a packaging line, where the low-pressure type keeps the actuators running gently and the 5 um element protects the control valves from moisture and fine dirt.
Supplying pneumatic clamps and swing cylinders on an assembly fixture, with the square psi gauge giving operators a direct reading of clamp circuit pressure and the automatic drain keeping condensate out of the valve stack.
Regulating air to a leak-test or pneumatic test bench, where fine 5 um filtration keeps sensitive transducers and reference instruments clean and the low-pressure type covers reduced test pressures.
The meaningful choices on this unit are all decodable from the code. Size 300 with a PT1/4 port suits circuits built around 1/4 in air preparation; step up to size 400 or 600 when the line needs larger ports and more flow. The 5 um element (W) is the finer option over the 40 um standard - choose it where downstream valves, cylinders or instruments are sensitive to carryover. The automatic drain removes condensate on its own; manual and differential-pressure drains are the alternatives on other variants. The square gauge reads psi, with MPa and bar scales and an external round gauge available as options. G (BSPP) and NPT threads can be ordered instead of PT, a mounting bracket is included, and no reverse-flow check valve is fitted (K variants add one). Flow is published as curves, not a single rating, so send us your pressure and flow requirements 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 required flow, and we will confirm against the datasheet whether the 300 size with a 1/4 in port suits your application.
The L in the code makes this the low-pressure regulator type, intended for circuits that run at reduced regulated pressure; the exact adjustment range for this type is not published in the standard table, so we confirm it on request. The automatic drain ejects collected condensate from the bowl by itself, so no routine manual draining is needed - manual-drain and differential-pressure variants exist if you prefer a different arrangement.
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.