The AirTAC GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, 5 um 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 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a 3/8 in NPT port, fitted with the fine 5 um filter element (code W) for applications that need cleaner air than the standard 40 um grade, a manual drain for controlled bowl evacuation, and the low-pressure type regulator for circuits that operate at reduced set pressures. It comes with an external round gauge scaled in bar, a built-in reverse/check valve that holds downstream pressure when the supply is lost, and a mounting bracket included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and thread options in PT, G (BSPP) and NPT. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, 5 um |
|---|---|
| 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 3 | Gauge scale: bar. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Feeds the clamping and tool-change circuits of a machining centre with filtered, regulated air; the 5 um element protects tight-tolerance valves and cylinders, and the check valve holds clamp pressure if the shop air drops.
Supplies the sealing arms, diverters and pick-and-place cylinders on a packaging line; the low-pressure type regulator suits circuits set below standard line pressure, and the manual drain fits a supervised daily checks routine.
Prepares air for actuated gates and capper heads on a bottling line; the 5 um grade keeps moisture and particulate out of sensitive pneumatic components, with the bar-scaled gauge giving operators a local set-point readout.
Choose the GFR300-10 when your line needs the 300 size with a 3/8 in NPT port and your flow demand sits in that step of the series - larger sizes carry larger ports and more flow capacity. This unit pairs the 5 um element (choose 40 um instead if coarse filtration is enough) with a manual drain, which suits installations where an operator drains the bowl on a schedule; automatic and differential-pressure drains are available elsewhere in the series. The low-pressure type regulator is intended for circuits running at reduced set pressures - confirm the exact range with us before ordering. The round gauge reads in bar; embedded square gauges and MPa or psi scales are the other catalogue options.
PT is the standard thread for the series, with G (BSPP) and NPT as order options - this code specifies NPT. A bracket is included on this unit. Because flow is published as curves and not a single rating, send us your application details and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as curves, not as a single rated figure, so we do not quote a number here. Send us your application details - required flow, working pressure and downstream equipment - and we will confirm the sizing against the datasheet on request before you order.
The M in the code specifies a manual drain: an operator opens the bowl drain to expel collected water and dirt. It suits installations with a regular maintenance routine. If you prefer unattended operation, the series also offers automatic and differential-pressure drain options - tell us your setup and we will confirm the right variant.
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.