The AirTAC GFR300-10G AirTAC Filter Regulator 3/8 in G Thread 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-10G is a filter regulator in one body: it removes water and particulate from compressed air and regulates downstream pressure in a single 300-size unit. This configuration has a 3/8 in port with G (BSPP) thread, a manual drain bowl in polycarbonate, a standard 40 um filter element, and a round pressure gauge reading in psi. The regulation range is 0.05-0.9 MPa (7-130 psi), and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of port sizes, G or NPT thread options, manual, automatic or differential-pressure drains, a 5 um element (code W), gauge scale options, and a reverse/check valve option. Flow is published in the catalogue as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-10G AirTAC Filter Regulator 3/8 in G Thread |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (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) |
Feeding a bench-mounted pneumatic press: the GFR300-10G cleans water and swarf from the shop air line and holds a steady regulated pressure to the press valve, with the psi gauge giving the operator a direct setting reference.
Supplying cylinders and air actuators on a packaging conveyor: the unit filters condensate and particles from the header line and regulates the pressure to the actuators, with the manual drain bled during scheduled line checks.
Point-of-use air preparation at a CNC machining cell: the filter regulator conditions the 3/8 in drop from the plant air ring main before it reaches tool-clamp and coolant-spray circuits, protecting downstream valves from water and debris.
Choose the size and port step against the air demand of the circuit: the GFR300 with its 3/8 in port sits in the middle of the 200/300/400/600 range, and stepping up a size gives a larger port and more flow capacity. This unit has a manual drain, which suits installations where an operator can bleed the bowl on a routine basis; choose the automatic or differential-pressure drain code instead for unattended duty. The 40 um element fitted here is the standard grade; specify the W code for the 5 um element where finer filtration is needed. The round gauge on this unit reads in psi; MPa and bar scales are available, and an embedded square gauge is the standard alternative. G thread is fitted here; PT is the standard thread and G or NPT are catalogue options to order. A mounting bracket is optional (this configuration is supplied without one), and a reverse/check valve can be specified. Flow is published as curves, not a single rating, so 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 in the catalogue, not as a single rated figure, so we do not quote a l/min or SCFM number. Tell us your application and we will confirm the flow and sizing figures from the datasheet on request before you order.
The M code in GFR300-10MJC2G specifies a manual drain bowl: condensate is released by operating the drain by hand. This suits installations with routine operator checks. If the unit is mounted where regular bleeding is impractical, order the automatic (A) or differential-pressure (blank) drain code instead - the regulation range differs by drain type: 0.05-0.9 MPa (7-130 psi) for manual drain, 0.15-0.9 MPa (20-130 psi) for automatic and differential-pressure drains.
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.