The AirTAC AirTAC GFR300C10LJF2G Filter Regulator G3/8 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 GFR300C10LJF2G is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air with the standard 40 um element, then regulates downstream pressure. This unit is the low-pressure type, sized for circuits that run below the standard regulator span, and it carries a G3/8 (BSPP) port. The differential-pressure drain bleeds collected condensate automatically whenever the pressure differential across the element is high enough, so no manual draining routine is needed. An embedded square gauge reading in psi is fitted so the set pressure is visible at the unit, and no reverse/check valve is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The bowl on this size 300 unit is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options, thread choices (PT standard; G and NPT to order), manual or automatic drain variants, a 5 um (W) filter element option, gauge scale choices and bracket options. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | AirTAC GFR300C10LJF2G Filter Regulator G3/8 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. |
|---|---|
| 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 fixture that clamps workpieces at reduced air pressure, this unit filters the shop air and holds the regulated setpoint, with the psi gauge showing the setting at the cell.
Feeding pick-and-place and sealing cylinders on a packaging conveyor, it strips water and particulate from the main line and regulates a stable, lower supply pressure to the actuators.
On looms and textile machinery that run sensitive pneumatic jets and guides at reduced pressure, it conditions the compressed air and keeps the regulated supply visible on the built-in gauge.
Size and port step up with required flow: this is size 300 with a G3/8 port; move to 400 or 600 if your demand outgrows it, or down to 200 for compact circuits. Because flow is published as curves and not a single rating, ask us to check the curve against your application before you order. The low-pressure type (code L) is the decodable choice here - it is intended for circuits running below the standard regulator span; confirm the exact regulation span with us. Drain is differential-pressure as standard; automatic (A) and manual (M) variants exist if you prefer a set-and-forget or a hands-on drain. Filter grade is the standard 40 um; specify W for the 5 um element where finer particulate removal matters. The fitted square gauge reads in psi; MPa and bar scales are also available, and an external round gauge is an option. Thread is G (BSPP) here; PT is the standard and NPT is an order option. No mounting bracket is included with this code (J); brackets are available on other variants.
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 GFR300 series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow curve and datasheet figures on request before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits that run below the standard regulator span. The exact span for this variant is not published on the sheet we work from, so confirm it with us. This unit also uses the differential-pressure drain, which bleeds condensate automatically as the element loads, with no manual draining.
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.