The AirTAC GFR30008AF2GK AirTAC Filter Regulator G1/4, 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 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 GFR30008AF2GK is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration has G1/4 (BSPP) ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a square pressure gauge reading in psi, and a built-in reverse/check valve that holds downstream pressure when the upstream supply is lost. The maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl is protected by the included mounting bracket.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, thread types (PT standard; G and NPT as order options), drain types (differential-pressure, automatic or manual), a 5 um element option (code W), gauge scale, and low-pressure or check-valve variants where the family allows. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR30008AF2GK AirTAC Filter Regulator G1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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 | 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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding clamp cylinders on a machining-cell press: the GFR30008AF2GK cleans water and chips-laden condensate out of the shop air and holds a steady clamping pressure, while the check valve keeps the clamp from releasing if the main supply drops.
Point-of-use preparation for carton-sealing and wrapping machines running 1/4 in air drops: the automatic drain handles condensate on a line that runs unattended through shifts, and the psi gauge lets operators verify set pressure at a glance.
A bench-mounted supply point for impact wrenches, die grinders and blow guns: the 40 um element stops pipe scale and water reaching the tools, the regulator sets a safe working pressure, and the bracket gives a secure wall or bench mount.
Start with the port and size step: 300 size with G1/4 ports suits lines plumbed at 1/4 in, while larger sizes (400, 600) move more air at the same pressure drop - match the step to your required flow. Choose the drain to match access: automatic (this model) suits enclosed or infrequently attended installations, manual suits attended daily checks, and differential-pressure draining is the default. The 40 um element is standard; specify the 5 um W option where finer particulate removal is needed. The embedded square gauge is fitted here in psi; MPa and bar scales and an external round gauge are alternatives. Thread is G (BSPP) on this unit; PT is the standard and NPT is an order option. A mounting bracket is included.
One honest note before ordering: AirTAC publishes flow as curves, not a single rated number, so send us your application conditions and we will confirm the correct size from the datasheet before you commit.
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 filter-regulator performance as flow curves rather than a single rated figure, so we do not quote one number. Send us your inlet pressure, set pressure and expected air consumption, and we will confirm the sizing from the datasheet on request before you order.
The A in the code specifies an automatic drain, which ejects collected condensate by itself and suits enclosures or lines that run without daily attention. A manual drain needs someone to open it regularly, and the differential-pressure drain (the default when no drain letter appears in the code) discharges when the pressure drop across the element rises. All three are catalogue options across the GFR range.
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.