The AirTAC GFR300-10G 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 GFR300-10G is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air with a 40 um element and regulates downstream pressure in one compact unit. This configuration is the low-pressure type (code L), sized for 3/8 in ports with G (BSPP) threads. It carries a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the bowl is sufficient, a polycarbonate bowl, a round pressure gauge reading in psi, and a mounting bracket is included. 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. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and each size can be ordered with manual or automatic drain instead of the differential-pressure default, a 5 um element (code W) instead of 40 um, different gauge scales (MPa, psi or bar), and PT, G or NPT threads. Flow 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 | GFR300-10G 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 — round, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Fixture clamps that must hold at a reduced set pressure rather than full line pressure get both clean air and gentle, adjustable regulation from this low-pressure-type filter regulator, with the psi gauge letting an operator verify the setting at the fixture.
Upstream of the actuators on a carton or tray packaging line, the unit strips water and particulate from the shop air and holds a steady regulated supply, while the differential-pressure drain clears collected condensate without daily manual draining.
Bench and pilot rigs running pneumatic valves and actuators at reduced pressures benefit from filtered, regulated air in one body; the low-pressure type and round psi gauge make set-and-verify adjustments straightforward during test runs.
Start with the port: this unit is the 300 size with a 3/8 in G-thread port, so check it against your line size and the flow your circuit needs - moving up a size (400) or down (200) changes both. The drain here is the differential-pressure default; if your compressor cycles infrequently or the unit sits in an awkward spot, a manual-drain (M) or automatic-drain (A) version may suit better. The 40 um element is the standard grade; specify W for the 5 um option if downstream equipment needs finer filtration. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. G thread is as coded here - PT is the catalogue standard and NPT is also available - and the bracket is included. 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 characteristic curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and expected air consumption, and we will confirm the sizing and the datasheet figures for this 3/8 in unit on request before you order.
The L in GFR30010LC2G marks this as the low-pressure type of the GFR300, intended for circuits regulated well below full line pressure. The exact adjustment range for the low-pressure type is not published in the material we hold, so ask us to confirm it against your set pressure. The standard-type GFR300 carries the published adjustment range instead.
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.