The AirTAC GFR300C08ALF2GK AirTAC Filter Regulator G1/4 Low-Pressure 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 GFR300C08ALF2GK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation in a single body, sized for a G1/4 (BSPP) port. This configuration carries an automatic drain that discharges collected condensate without manual attention, a 40 um standard filter element, and a low-pressure regulator type for circuits that run at reduced set pressures. An embedded square gauge with a psi scale is fitted so the downstream setting can be read directly, a reverse/check valve is built in, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options and choices of drain type, filter grade (40 um standard, 5 um with code W), gauge style and scale, and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300C08ALF2GK AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| 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) |
Air-actuated clamps and swing cylinders on a machining centre hold workpieces at a reduced set pressure so parts are secured without distortion. This unit filters the shop air feeding those actuators, regulates it down to the clamp setting read on the psi gauge, and its check valve holds the downstream circuit if upstream supply dips.
Tape heads, flap tuckers and case-eject cylinders on a carton-sealing machine run best at a moderate, stable pressure below the main header. This filter regulator cleans the supply, sets the station pressure on the square psi gauge, and the automatic drain keeps condensate out of the valves through multi-shift running.
Pop-up diverters, stops and pusher cylinders along a parcel conveyor fire hundreds of times an hour on header air. Feeding them through this unit removes water and particulate that would score the cylinder bores, regulates the branch to the pressure the diverters were set up for, and the automatic drain handles moisture without a daily walk-round.
Step through the decodable choices in order. Size 300 with a G1/4 port suits lines plumbed at 1/4 in; if your compressor capacity or pipe size points elsewhere, the same function is available in sizes 200, 400 and 600 with the matching port step. Drain type matters: automatic (this unit) empties the bowl on its own, while manual and differential-pressure drains suit attended or duty-matched installations. The 40 um element is the standard grade; specify 5 um (code W) only where finer particulate control is needed. Gauge scale is psi here, with MPa and bar scales offered, and the thread is G (BSPP) - PT is the standard series thread and G/NPT are order options. A bracket is included with this unit.
One honest note before you order: flow for this series is published as curves, not a single rated number, so we cannot quote a flow figure here. Send us your application details and we will confirm sizing against the datasheet curves on request.
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 quote a flow number here. Send us your application - pipe size, expected consumption and operating pressure - and we will confirm the relevant datasheet curve and sizing on request before you order.
The L code marks the low-pressure regulator type, intended for circuits that operate at reduced set pressures rather than near full line pressure; the exact adjustment range for this variant is not published in the standard table, so we confirm it on request. The A code in the middle of the model is the drain: this bowl drains condensate automatically instead of relying on manual draining or a differential-pressure trigger, which suits unattended or hard-to-reach mounting positions.
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.