The AirTAC AirTAC GFR300-10 Filter Regulator 3/8 in NPT is a genuine G-series filter regulator: water separation, 5 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 GFR300-10 combines water and particulate filtration with pressure regulation in a single body, so one component conditions the air and sets the downstream working pressure. This size 300 unit is supplied with 3/8 in NPT ports, a manual drain for emptying the bowl, and a fine 5 um filter element for cleaner air than the standard 40 um grade. The standard regulator covers a setting range of 0.05-0.9 MPa (7-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). No gauge is fitted with this configuration and no mounting bracket is included; the polycarbonate bowl suits this size class.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um filter grades, and gauge options. Flow figures for the series are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | AirTAC GFR300-10 Filter Regulator 3/8 in NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding filtered, regulated air to the tool-change clamps and air-blast nozzles on a machining centre, where the 5 um element protects the chuck and clamp cylinders from fine swarf-laden moisture.
Conditioning the air branch that drives bagger and cartoner gripper cylinders, with the regulator set to the pressure the machine builder specifies and the manual drain emptied at each shift check.
Supplying a workstation of impact drivers and air ratchets at a stable set pressure, with the fine 5 um grade keeping water and particles out of the tool motors.
Size 300 with 3/8 in NPT ports sits mid-range in the GFR series; step up to size 400 or 600 for larger supply lines and higher air demand, or down to size 200 for compact circuits. The 5 um element in this unit is the right choice where downstream valves and cylinders see more airborne dirt than the standard 40 um grade is meant to handle. The manual drain means an operator opens the drain valve to discharge collected water, which suits stations that are checked regularly; choose automatic or differential-pressure drains where the unit is not easily reached. This configuration has no gauge and no bracket, and the regulator is the standard type with a 0.05-0.9 MPa setting range. Flow for the series is published as curves, not a single rated figure, 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 rather than a single rated figure, so there is no one rated flow number we can quote for this unit. Tell us your line pressure, set pressure and the air demand of the equipment downstream, and we will confirm the sizing from the datasheet on request before you order.
The M in the code GFR30010MJNWT specifies a manual drain: collected water is released by opening the drain valve at the bottom of the bowl. That suits stations that are inspected on a routine basis. If the unit will be mounted where it cannot easily be reached, the same series can be ordered with an automatic or differential-pressure drain 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.