The AirTAC GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, Auto Drain 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 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 AirTAC GFR300-10 is a filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This configuration has a 3/8 in NPT port, a polycarbonate bowl with automatic drain, a 40 um standard filter element, an embedded square gauge scaled in MPa, and a reverse (check) valve fitted; mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the G-series 300 size, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, gauge styles and scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm figures from the datasheet on request before you order.
| Model | GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Conditions and regulates the air feeding pneumatic clamps and swing cylinders on a machining cell, keeping clamp pressure steady while the 40 um element stops pipe scale and condensed water reaching the fixture.
Sits upstream of the divert gates and pusher cylinders on a packaging conveyor, filtering the shop air and holding a set pressure so diverters act consistently through each shift; the automatic drain handles condensate without operator attention.
Feeds the pneumatic actuators on a bench-top test rig, where the check valve holds the set downstream pressure against supply dips and the square MPa gauge gives a direct local reading for test setup.
Size and port: GFR300 covers a 3/8 in port; step up to GFR400 or GFR600, or down to GFR200, as your line's flow demand and piping change. Drain: this unit drains condensate automatically; manual-drain and differential-pressure versions are also available. Filtration: 40 um is standard here; specify the W code for a 5 um element where finer protection is needed. Gauge: the embedded square gauge is scaled in MPa, with psi or bar scales and an external round gauge available as options. Thread: PT is the standard; G (BSPP) and NPT are catalogue options to order, and this unit is ordered with NPT. A mounting bracket is included.
Sizing honestly: flow for this series is published as curves, not a single rated figure, so 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 the GFR series as curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your application details and we will confirm the flow and full datasheet figures for the GFR300-10 on request before you order.
The automatic drain on this unit ejects collected condensate by itself, which suits unattended or hard-to-reach installations. Manual-drain and differential-pressure versions are also available in the series; note that manual-drain versions carry a wider 0.05-0.9 MPa (7-130 psi) regulation range, while this automatic-drain unit adjusts from 0.15 to 0.9 MPa (20-130 psi).
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.