The AirTAC GFR30008AF2WK AirTAC Filter Regulator PT1/4 5 um Auto Drain is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" ports, a automatic 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 GFR30008AF2WK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded PT1/4 (1/4 in), carries the 5 um filter element (code W) for finer filtration than the 40 um standard, and drains condensate automatically, so the bowl does not rely on someone opening a manual drain. The embedded square gauge reads in psi, a reverse/check valve is fitted to hold downstream pressure, and the mounting bracket is included. The bowl on this 300 size is polycarbonate (PC).
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request before you order.
| Model | GFR30008AF2WK AirTAC Filter Regulator PT1/4 5 um Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Point-of-use conditioning for the 1/4 in air feed to a CNC machine's pneumatic tool changer and clamping fixtures, with 5 um filtration protecting the machine's air valves and an automatic drain keeping the bowl clear between shifts.
Conditioning the air feed to carton taping and case-sealing heads on a packaging conveyor, where the regulator holds a steady actuation pressure in psi on the square gauge and the check valve keeps cylinders from drifting on a supply dip.
Feeding filtered, regulated air to a bench-mounted pneumatic press or workholding clamp circuit, where the 5 um element guards the directional valve and the automatic drain suits a unit mounted behind the machine frame.
Size 300 with a 1/4 in PT port suits lines where the port step matches your piping; step up to 400 or 600 if your flow demand outgrows the 1/4 in connection. Choose the 5 um element (this model) when downstream valves, cylinders or instruments need finer protection than the 40 um standard; the automatic drain here suits unattended or hard-to-reach installations, while manual or differential-pressure drains suit attended points. The square gauge is set to the psi scale; MPa and bar scales and an external round gauge are alternatives. PT is the standard thread, with G (BSPP) and NPT available to order, and the bracket is included.
Because flow is published as curves and not a single rating, 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. The reflux valve permits reverse flow 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 there is no one number we can honestly quote. Tell us your application and we will confirm the flow from the datasheet curves on request before you order.
The W in the code GFR30008AF2WK selects the 5 um filter element instead of the 40 um standard, for finer protection of downstream valves and instruments. The A selects an automatic drain, which expels condensate on its own instead of relying on a manual drain being opened - useful for unattended or hard-to-reach mounting points.
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.