The AirTAC GFR300-10 AirTAC Filter Regulator, PT3/8, 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 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 GFR300-10 is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, sized at 300 with a PT3/8 (3/8 in) port. This configuration carries a 40 um standard filter element, a manual drain on the bowl, and the low-pressure regulator type for circuits that run at reduced set pressures. The embedded square gauge is fitted with a psi scale, a reverse/check valve is fitted to hold downstream pressure, and no mounting bracket is included in this code.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, available with manual, automatic or differential-pressure drains, a 40 um standard or 5 um (W) fine element, square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures on request.
| Model | GFR300-10 AirTAC Filter Regulator, PT3/8, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 40 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 — square, psi 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. |
| 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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds a low-pressure clamping circuit on a CNC fixture, where the filter strips water and chips from the shop air and the regulator holds a reduced, repeatable set pressure on the clamps.
Sits at the air inlet of a carton-sealing or wrapping conveyor section, cleaning the supply and regulating it down for the cylinders that drive the flap-fold and seal heads.
Conditions the compressed air feeding bench-top lab apparatus that needs clean, moisture-reduced air at a low, stable setting, with the psi gauge giving a direct local readout.
Step up or down through the GFR sizes (200, 300, 400, 600) so the port and body match the flow your line needs - here that is size 300 with a PT3/8 port. Drain choice matters in service: this unit has a manual drain, which suits installations where an operator can bleed the bowl on a routine; choose automatic or differential-pressure drain codes if the bowl must clear itself. The 40 um element is the standard grade; specify the W code for 5 um fine filtration. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are the other gauge options. PT is the standard thread on this model, with G (BSPP) and NPT as order options, and the J code means no mounting bracket is supplied. Because flow is published as curves rather than one rated figure, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes G-series flow as performance curves rather than a single rated figure, so we do not quote a flow number for this unit. Ask us and we will confirm the datasheet curve for the GFR300 at PT3/8 and check it against your application before you order.
The M in the code selects a manual drain: an operator opens the bowl drain to expel collected water and dirt. If the installation cannot be bled routinely, order the automatic (A) or differential-pressure (blank) drain code instead, which clears the bowl without operator action.
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.