The AirTAC GFR300-10LJF2G AirTAC 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 PT3/8" 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 GFR300-10LJF2G is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This unit is built on the 300 size with a G3/8 (BSPP) port, carries the standard 40 um filter element, and drains condensate by differential pressure, so the bowl empties only when the pressure drop across the element calls for it. It is the low-pressure type; its exact regulation range is not published, so ask us to confirm it against your setpoint. A square gauge reading in psi is fitted, the 300-size polycarbonate bowl gives a clear view of condensate and element condition, and no mounting bracket is included (code J). Maximum inlet pressure is 1.0 MPa (145 psi) and the temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with ports from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, square or round gauges with MPa, psi or bar scales, and G or NPT thread options where PT is the standard. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application before ordering.
| Model | GFR300-10LJF2G AirTAC Filter Regulator, G3/8, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, psi 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use preparation for the pick-and-place and sealing cylinders on a carton packaging line: water and pipe scale removed from shop air, then pressure held steady at the low setting the cylinders are set up for.
Filtered, regulated air for bench-top lab apparatus and pneumatic test rigs that run at lower regulated pressures than a standard regulator covers, with the psi gauge giving a direct local readout at the bench.
Air preparation for a clamp circuit on a machining fixture where the clamping pressure must sit below the standard regulator band and stay there through the cycle, with the 40 um element protecting the clamp valve.
Sizing starts with the port step: the 300 size sits mid-range in the GFR line with this 3/8 in port, and stepping to 200 or 400 changes both the port (1/4 or 1/2 in) and the flow curve, so match the size to your air demand. Choose the drain to suit maintenance: differential-pressure (this unit) drains only when flow creates the differential, automatic (code A) drains continuously, and manual (code M) needs a scheduled visit. Filtration is 40 um standard; specify W for the 5 um element where downstream equipment needs finer air. The gauge here is the embedded square type reading psi; round gauges and MPa or bar scales are catalogue options. Thread is G (BSPP) on this unit; PT is the standard and NPT is an order option. No bracket is fitted (code J) and no reverse/check valve is included, so plan mounting and backflow protection separately. Flow is published as curves, 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 GFR flow as curves, not a single rated figure, so we do not quote a number here. Send us your operating pressure and air demand and we will confirm the sizing from the datasheet on request.
This unit drains condensate by differential pressure: the bowl empties when the pressure drop across the 40 um element builds up. Choose automatic (code A) for continuous unattended drainage, or manual (code M) where a scheduled drain visit suits your maintenance routine. All three are catalogue options on the GFR300.
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.