The AirTAC AirTAC GFR300C08AF2WK Filter Regulator 1/4 in PT 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 GFR300C08AF2WK is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This size 300 unit is threaded PT1/4 (1/4 in), filters to 5 um for finer protection than the standard 40 um element, and drains condensate automatically, so the bowl does not depend on an operator or on a pressure differential to empty. The standard regulator covers 0.15-0.9 MPa (20-130 psi), read on the fitted square psi gauge, and a built-in check valve lets downstream air pass back through the unit when the supply is shut off.
This is a genuine AirTAC part from the GFR300 series. The GFR line runs in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is ordered with a choice of drain type, 40 um or 5 um filtration, gauge scale (MPa, psi or bar), PT, G or NPT thread, and bracket. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures for your application on request.
| Model | AirTAC GFR300C08AF2WK Filter Regulator 1/4 in PT |
|---|---|
| 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) |
Clean, regulated air to a clamping cylinder or pneumatic press on a fabrication cell: the 5 um element keeps scale and pipe debris out of the valve, the regulator holds the clamping setpoint, and the check valve holds the circuit when supply air is isolated.
Point-of-use preparation on packaging and cartoning machinery, where the 1/4 in PT connection feeds control valves and actuators and the automatic drain keeps condensate out of the machine without a daily bowl-draining routine.
Supplying suction generators and gripper circuits on robotic cells, where fine 5 um filtration protects sensitive vacuum components and the square psi gauge lets technicians verify and set the operating pressure at the cell.
Start with the port and size step: this unit is 1/4 in PT in size 300; step up to size 400 or 600 if your line needs more flow capacity, or down to size 200 for compact circuits. Choose the drain to match how the unit is serviced: automatic drain (this model) empties the bowl without attention, manual drain suits attended installations, and differential-pressure drain is the catalogue default. Filtration is 5 um here (code W) versus the standard 40 um - pick 5 um where downstream valves, cylinders or instruments need finer protection. The square gauge is fitted in psi scale; MPa or bar scales and an external round gauge are order options, as are G or NPT threads in place of the PT standard and a mounting bracket.
Flow for this series is published as curves, not a single rated figure, so we do not quote a number here. Ask us to confirm the datasheet and check the sizing against your application 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, not as a single rated figure, so we do not state a number here. Contact us and we will confirm the datasheet and check the flow curve for the GFR300 at your operating pressure against your application before you order.
This model carries code A, meaning an automatic drain: condensate collected in the bowl is expelled without an operator or a pressure differential to trigger it. The catalogue alternatives are manual drain (you drain the bowl yourself) and differential-pressure drain (the default). Automatic is the usual choice for unattended or hard-to-reach installations.
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.