The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in PT 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 300-size filter regulator that cleans compressed air and holds downstream pressure in one body. It removes water and particulate through a 40 um element, drains collected condensate by differential pressure, and regulates pressure as a low-pressure type. The square embedded gauge reads in psi, a reverse/check valve is fitted to hold the downstream setting if upstream pressure is lost, and the unit ships with a mounting bracket. The port is PT3/8 (3/8 in, PT thread).
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, G or NPT thread variants, automatic or manual drain choices, a 5 um filter element option and MPa, psi or bar gauge scales. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in PT 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 — 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". |
| (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). |
| 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) |
Cleaning and holding steady, moderate air pressure feeding tool clamps and pneumatic actuators on a machining centre, with the check valve protecting the set pressure if the main supply dips.
Supplying filtered, regulated air to cylinders that divert, clamp and eject packs on a food or consumer-goods conveyor line, with the 40 um element catching pipe scale and water before it reaches the valves.
A point-of-use filter regulator on the drop line feeding air tools and fixtures at an assembly bench, keeping the low working pressure the bench circuit was designed for and draining condensate automatically.
Choose the 300 size with its 3/8 in PT port when your line flow and pipework sit between the smaller 200 and larger 400 frames; step up or down a size if your flow demand changes. This unit uses the standard 40 um element, which suits general plant air; if you need finer filtration, ask about the 5 um (W) option. Drain is differential-pressure here, which handles condensate automatically as the pressure across the bowl demands; automatic (A) and manual (M) drains are also available in the family. The fitted square gauge reads in psi, and MPa or bar scales can be ordered. PT is the standard thread, with G (BSPP) and NPT as order options, and a bracket is included. Because flow is published as curves rather than a single rated figure, 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 performance curves rather than a single rated figure, so we do not quote a l/min, m3/h or SCFM number here. Tell us your application and required flow and we will confirm sizing against the datasheet on request before you order.
The K in GFR30010LF2K means a reverse/check valve is fitted, which holds the downstream pressure setting if the upstream supply is interrupted. The F2 means the embedded square gauge is included and reads in psi; MPa or bar scales and an external round gauge can be ordered instead. This is also a low-pressure type regulator, so its adjustment range differs from the standard version - ask us to confirm the exact range from 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.