The AirTAC GFR300C10ALJC3T AirTAC Filter Regulator 3/8 in NPT 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 GFR300C10ALJC3T is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is the size 300 unit with a 3/8 in NPT port, an automatic drain that ejects collected condensate without manual attention, the standard 40 um filter element, and the low-pressure regulator type for duties that call for reduced set pressures downstream. It comes fitted with an external round gauge scaled in bar, and is supplied without a mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The bowl on this unit is metal, fitted with the automatic drain.
This is a genuine AirTAC part. The GFR300 series is offered by AirTAC in sizes 200, 300, 400 and 600 with a choice of ports and thread options (PT standard, G and NPT to order), drain types (differential-pressure, automatic or manual), a 5 um filter element option (code W), and gauge styles and scales. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300C10ALJC3T AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
On a paint line, filtered air with a low, stable regulated supply keeps atomizing nozzles and air-assisted guns fed with clean air at reduced set pressure, while the automatic drain clears condensate between shifts.
Feeding sealing jaws and hold-down cylinders on a bagging or wrapping machine, the filter removes water and pipe scale that would mark film, and the low-pressure regulator holds the gentle clamp pressure the jaws need.
Clamps, chucks and test fixtures on a bench loop that run well below main-line pressure get one compact unit doing the filtering and the pressure reduction, with the bar-scaled round gauge giving the operator a visible set point.
Choose the size and port step against the air consumption of the circuit: this unit is size 300 with a 3/8 in NPT port; smaller or larger sizes move up or down in port and flow capacity. The automatic drain on this version suits points where the unit is not easily reached for daily draining; a manual-drain version is the lighter-duty choice, and the differential-pressure drain is the catalogue default. The standard element is 40 um; specify the W option for 5 um filtration. This is the low-pressure regulator type, so confirm the adjustment range against your set pressure before ordering. The gauge fitted here is the external round type scaled in bar; square embedded gauges and MPa or psi scales are the alternative choices. Thread is NPT on this code; PT is the standard and G is also available to order, as specification options only. A mounting bracket can be added on versions without the J code. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before you order.
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 no single flow number can be quoted here. Tell us your air consumption and line pressure and we will confirm the sizing from the datasheet on request before you order.
The automatic drain ejects collected condensate from the metal bowl by itself, so the unit does not need manual draining, unlike the manual-drain and differential-pressure-drain versions. The L in the code marks the low-pressure regulator type, intended for reduced downstream set pressures; its exact adjustment range is not published in the material we hold, so confirm it with us against your set pressure.
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.