The AirTAC GFR300-10T AirTAC Filter Regulator 3/8 in NPT, 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 automatic 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 GFR300-10T is an AirTAC GFR-series filter regulator: filtration and pressure regulation combined in a single body. This configuration is sized for 3/8 in NPT ports in the 300 frame, and it carries the W-coded 5 um filter element for finer water and particulate removal than the standard 40 um grade. The automatic drain expels collected condensate without anyone opening the bowl, which suits panels and installations that are not checked daily. It is the low-pressure regulator type and ships with a round pressure gauge reading in bar. The polycarbonate bowl is standard at this size, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with 1/8 in to 1 in ports in PT, G and NPT threads, with manual, automatic or differential-pressure drains, 40 um or 5 um elements, and a choice of gauge styles and scales. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR300-10T AirTAC Filter Regulator 3/8 in NPT, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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. 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". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (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. |
| (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) |
On a press line where fixtures are held at gentle setpoints below what a standard regulator is intended for, this low-pressure-type GFR filters the incoming air, holds the reduced pressure steady, and its automatic drain keeps condensate out of the clamp cylinders.
Instrument air at a lab bench benefits from the 5 um element, which strips finer particulate and water carryover than the standard grade, while the round bar gauge lets a technician read and set the supply pressure at a glance.
Feeding diverters, pushers and stop gates along a packaging conveyor, this unit filters and regulates the supply in one body, and the automatic drain handles moisture overnight so the Monday-morning start-up does not blow water into the valves.
Start with the port: this unit is the 300 size with 3/8 in NPT threads, so step up or down a size if your line runs larger or smaller - the GFR family covers 1/8 in to 1 in. Choose the drain to match how the unit is serviced: automatic (this model) drains itself, manual needs an operator, and the default differential-pressure drain bleeds only while flowing. Pick the filter grade: 40 um is standard, and the W option (fitted here) gives 5 um for finer protection. The gauge on this unit is the external round type reading in bar; embedded square gauges and MPa or psi scales are the other catalogue choices. Thread is NPT here, with PT standard and G (BSPP) available to order, and note that no mounting bracket is included with the J code. Flow is published as curves, not a single rating, so send us your flow requirement 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. 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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and required flow and we will confirm the datasheet curve for this exact configuration before you order.
The A code fits the automatic drain, which ejects collected condensate from the bowl on its own instead of waiting for a manual twist - useful where the unit is not checked daily. The L code makes it the low-pressure regulator type rather than the standard type; the exact adjustment range for this variant is not published in our sheet, so ask us to confirm it on the datasheet.
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.