The AirTAC AirTAC GFR300C08ALJC2GK 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 GFR300C08ALJC2GK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration has a G1/4 (BSPP) port, an automatic drain that removes collected condensate without manual attention, the standard 40 um filter element, a low-pressure regulator type, a round pressure gauge with psi scale, and a built-in reverse (check) valve; no mounting bracket is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. At size 300 the bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR300 series is one of four sizes (200, 300, 400 and 600) with ascending port and flow capacity, and the family can be ordered with manual or differential-pressure drains, a 5 um element (code W), an embedded square gauge or an external round gauge in MPa, psi or bar scales, PT, G or NPT threads, and with or without a bracket. The low-pressure regulator type in this code has an adjustment range that is not published as a single figure, and flow is published as curves rather than a rating - ask us to confirm both against the datasheet for your set pressure before ordering.
| Model | AirTAC GFR300C08ALJC2GK 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) |
Filtering and regulating the air feeding seal bars, vacuum generators and small cylinders on a food or carton packaging line, where a clean, low-pressure regulated supply keeps the actuators supplied at the set pressure the line was tuned for.
Regulating supply to pneumatic clamps and tool-holders on machining cells. The 40 um element protects downstream valves from water and particulate carryover, the psi-scaled gauge makes setpoint checks quick, and the fitted check valve suits circuits specified with one.
Providing filtered, low-pressure regulated air to pneumatic test benches and lab rigs where a psi-scaled gauge simplifies setup and verification, the automatic drain keeps the bowl clear unattended, and the check valve is required by the circuit design.
Size 300 with a G1/4 port sits mid-range in the GFR family (sizes 200, 300, 400 and 600 step up in port and flow capacity); match the step to your flow demand and we will confirm it against the published curves. This unit is configured with an automatic drain, the standard 40 um element (specify code W for the 5 um grade where finer filtration is needed), a low-pressure regulator type, a round psi-scaled gauge, and a built-in check valve; no mounting bracket is included with this configuration. The port thread is G (BSPP); PT is the AirTAC standard and NPT is also available as an order option. Because flow is published as curves rather than 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 curves rather than a single rated figure, so we do not quote a number here. Tell us your operating pressure and required flow, and we will confirm sizing against the datasheet curves before you order.
GFR300 is the filter-regulator series in size 300, 08 is the 1/4 in port, C fits the round external pressure gauge, 2 sets its scale to psi, A is the automatic drain, L is the low-pressure regulator type, J means no mounting bracket, G specifies the G (BSPP) thread instead of the PT standard, and K means a reverse (check) valve is fitted.
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.