The AirTAC AirTAC GFR300-10MJF2WG Filter Regulator G3/8 (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 GFR300-10MJF2WG is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a G3/8 (BSPP) port, a 5 um filter element for finer filtration than the standard 40 um grade, a manual drain on the PC bowl, and an embedded square gauge reading in psi. The standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions.
This is a genuine AirTAC part from the G-series range, which spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 inch. Bowl material is PC (polycarbonate) at this size, with aluminium alloy used on the 600 size. Drain types, filter grades, gauge scales and thread options (PT standard, with G and NPT as order options) are all catalogue choices. Because flow is published as curves rather than a single rating, we confirm the datasheet and flow figures for your application on request.
| Model | AirTAC GFR300-10MJF2WG Filter Regulator G3/8 (5 um) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | 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. 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds clean, regulated air to tool-clamp and chip-clearing cylinders on a machining centre, with the 5 um element protecting the clamp valve internals and the psi gauge letting setters verify clamp pressure at a glance.
Sits at the drop to a carton sealer's flap-fold and tape-head cylinders, filtering condensate out of the shop air and holding a steady regulated pressure so box dimensions seal consistently through the shift.
Prepares air for the pick-and-place and case-erecting cylinders of a packaging cell, with the manual drain bled at shift start and the regulator set to the actuator circuit's working pressure.
Start with size and port: the 300 size steps up from the 200 series when your line needs more flow at 3/8 inch, and larger 400/600 sizes exist for heavier demand. Choose the drain to suit access: this unit has a manual drain, which suits attended installations where an operator can bleed the bowl; automatic and differential-pressure drains are available on other configurations for unattended duty. The 5 um element here is the finer option versus the standard 40 um grade - pick 5 um where downstream valves and instruments need cleaner air. The fitted square gauge reads in psi; MPa and bar scales, and an external round gauge, are catalogue alternatives. Thread is G (BSPP) here, with PT as the standard series thread and NPT available to order. A mounting bracket can be specified or omitted (this configuration has none).
One honest note before ordering: AirTAC publishes flow as curves, not a single rated figure, so ask us to confirm sizing against your actual air consumption before you commit.
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 this series as curves rather than a single rated number, so we do not quote a figure here. Tell us your application and required air consumption and we will confirm the flow and datasheet figures for the GFR300 at 3/8 inch on request before you order.
The M in the code specifies a manual drain on the filter bowl: condensate is released by operating the drain by hand. It suits installations where someone is present regularly - a daily or shift-start bleed is the usual habit. If the unit will sit unattended, ask about the automatic or differential-pressure drain versions of the same GFR300 filter regulator.
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.