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 differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 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 one body. This 300-size unit is built on PT3/8 ports and is the low-pressure (L) type, so it is intended for circuits that run at reduced settings - ask us to confirm the exact setting range, as it is not published in the standard tables. It carries the standard 40 um filter element with a differential-pressure drain that releases condensate as the pressure differential across the element builds, a round gauge on a psi scale, and a reverse/check valve (K) that helps hold downstream pressure if the supply dips. The mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing; the bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family spans 200, 300, 400 and 600 sizes with ports from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, embedded square or optional external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm flow and other datasheet 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 | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 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 regulated low-pressure atomizing air to spray guns in a finishing booth. The 40 um element keeps moisture and grit out of the gun and the check valve helps hold the set pressure if the supply dips mid-pass.
Supplies filtered, regulated air to grippers and clamp cylinders on a cartoning or case-packing line. The psi gauge lets operators set and verify clamp pressure at a glance, and the included bracket simplifies panel mounting.
Runs the low-pressure cylinders and actuators on a bottling or filling carousel. The differential-pressure drain clears condensate as air flows, protecting downstream valves on a line that runs through wet shop air.
Size the port to the air demand: GFR300 on PT3/8 sits mid-range, with 200, 400 and 600 sizes stepping down or up. Because this is the low-pressure (L) type, confirm the setting range suits your circuit before ordering - we will check it against the datasheet. Choose the drain: differential-pressure (this unit), automatic (A) or manual (M). Filtration is 40 um standard; the W suffix gives 5 um for finer protection. The gauge here is the external round type on a psi scale; MPa and bar scales are available, and threads can be ordered in G (BSPP) or NPT instead of the PT standard. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application 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 family as curves, not as a single rated number, so we will not quote a figure that is not in the datasheet. Send us your demand - port pressure, downstream setting and consumption - and we will confirm the flow from the datasheet curves on request before you order.
GFR is the filter-regulator family and 300 is the size; 10 decodes to a PT3/8 port. L marks the low-pressure type, C2 fits the external round gauge on a psi scale, and K means a reverse/check valve is fitted. The drain is the differential-pressure type and the 40 um filter element is standard.
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.