The AirTAC GFR300C08ALF2G 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 AirTAC GFR300C08ALF2G is a size-300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration carries a G1/4 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and a low-pressure regulator type for circuits that run below standard setpoints. An embedded square gauge graduated in psi is fitted, a mounting bracket is included, and no reverse/check valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the G-series filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. At size 300 the bowl is polycarbonate (PC), the standard material for this size; aluminium alloy bowls apply at size 600. Thread options G (BSPP) and NPT can be ordered alongside the PT standard, and 5 um (code W) elements are available where finer filtration is needed. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08ALF2G 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) |
On a beverage bottling line, the G1/4 filter regulator conditions the air feeding conveyor stopper and pusher cylinders, removing water and particulate while holding a low regulated pressure suited to light-duty actuators. The automatic drain handles condensate through continuous shifts.
In a small-parts assembly cell, this unit supplies filtered, regulated air to pneumatic clamps and hold-downs on a fixture table. The low-pressure regulator type matches circuits that run below standard setpoints, and the psi-scaled square gauge gives operators a direct local reading.
On a laboratory test rig or pilot rig using pneumatic valves and sample-handling cylinders, the 40 um element protects sensitive components from particulate and water carryover, while the regulator holds a stable low supply pressure and the bracket allows clean panel-edge mounting.
Choose the size and port step against the air consumption of the downstream circuit: this unit is size 300 with a G1/4 port, one step in the 200/300/400/600 range where larger sizes carry larger ports and more flow. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering. The automatic drain on this unit suits unattended installations; manual and differential-pressure drains are the alternatives in the family. The 40 um element is the standard grade, with 5 um (W) available for finer protection. The fitted square gauge is scaled in psi; MPa and bar scales and an external round gauge are options. PT is the standard thread, with G (BSPP) and NPT as order options - this unit is specified with G. A mounting bracket is included.
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 this series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application's air consumption and line pressure and we will confirm the relevant datasheet curve figures for the GFR300 at G1/4 before you order.
The L indicates the low-pressure regulator type, intended for circuits regulated below standard setpoints; the exact regulation range for this variant is not published in the catalogue, so we confirm it on request. The A in the code specifies an automatic drain, which expels collected condensate from the bowl on its own, where a manual drain (M) would need periodic bleeding by an operator.
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.