The AirTAC GFR300C08AJF2G 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 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 GFR300C08AJF2G is a GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This size 300 unit is configured with G1/4 ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in psi, and the standard regulator covering an adjustment range of 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits this size, and no mounting bracket is included in this configuration.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 to 1 inch, G or NPT thread variants, manual or differential-pressure drain alternatives, a 5 um (code W) element option, gauge scale choices, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08AJF2G AirTAC Filter Regulator G1/4 Auto Drain |
|---|---|
| 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 the pneumatic valve island on a carton-form-fill-seal machine: the 40 um element removes water and pipe scale before the directional valves, while the regulator holds a stable setting for consistent bag sealing cylinder action. The automatic drain keeps condensate off the machine frame during multi-shift runs.
Regulating supply to the clamp cylinders on a bench-mounted pneumatic assembly press. The square psi gauge lets the setter read and lock the clamping pressure directly, and the G1/4 port matches the standard fittings on the machine's air preparation panel.
Conditioning air at the drop point feeding impact wrenches and air ratchets in a maintenance workshop: the filter stage strips water and grit that ruin tool vanes, and the regulated output gives technicians a repeatable pressure at the reel. The automatic drain suits a drop that is not purged every shift.
Size and port are the first decodable choice: this unit is size 300 with G1/4 ports; step up to size 400 or 600 for larger ports and flow, or down to size 200 for compact lines. Drain type matters in practice: this configuration has an automatic drain (code A) suited to unattended duty; manual-drain versions widen the regulation floor to 0.05 MPa, and the default differential-pressure drain is the third option. The 40 um element fitted here is the standard grade; specify code W for the 5 um fine grade where downstream valves demand cleaner air. The square gauge reads in psi; MPa and bar scales are available, and an external round gauge is optional. Thread is G here, with PT and NPT as catalogue alternatives; a bracket (omitted on this unit, code J) can be added, and a reverse/check valve (code K) is an option this configuration does not carry. 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. 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 characteristic curves, not as a single rated figure, so we do not quote one number. Send us your line pressure, set pressure and expected air demand, and we will confirm the flow and sizing from the datasheet on request before you order.
This configuration carries code A, an automatic drain that discharges collected condensate from the bowl without operator attention - the right choice for unattended or multi-shift installations. The catalogue alternatives are the default differential-pressure drain and a manual drain (code M); note that the manual-drain variant widens the regulator adjustment range down to 0.05 MPa (7 psi), while the automatic-drain range on this unit is 0.15-0.9 MPa (20-130 psi).
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.