The AirTAC GFR300-10 AirTAC Filter Regulator, PT3/8, Square psi Gauge 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 GFR300-10 is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one combined body. This configuration is the 300 size with a PT3/8 (3/8 in) port and PT thread. It carries the standard 40 um filter element and a differential-pressure drain, which bleeds accumulated condensate automatically whenever the pressure differential across the element rises. The set pressure range is 0.15-0.9 MPa (20-130 psi), and the embedded square gauge is scaled in psi so operators can read and adjust the downstream setting directly. A reverse/check valve (code K) is fitted, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, a 5 um element option (code W), gauge scale choices, and G or NPT thread variants orderable in place of the PT standard. 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 rated figure, so ask us to confirm datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator, PT3/8, Square psi Gauge |
|---|---|
| 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 | 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 | 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. 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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) |
Point-of-use conditioning for a machining centre's pneumatic valves and actuators: the 40 um element strips water and swarf-laden particulate before the regulator sets a stable supply pressure, with the psi gauge readable at the machine.
Mounted ahead of the cylinders and grippers on a packaging conveyor, the unit filters condensate from the shop-air drop and holds the regulated pressure the conveyor's air logic was designed around.
Installed at each workbench air drop in an assembly plant, the filter regulator gives operators clean air and a locally adjustable pressure setting, while the fitted check valve holds the downstream setting if supply pressure dips.
Start with the port step: this unit is the 300 size at PT3/8, so match it to your line size and the flow your circuit needs - larger sizes (400, 600) carry larger ports and more flow capacity. Choose the drain next: the differential-pressure drain fitted here suits most continuous-duty installations; an automatic drain (code A) suits unattended duty, and a manual drain (code M) suits intermittent use. The standard element is 40 um; specify code W for the 5 um grade if downstream equipment needs finer filtration. Gauge scale is selectable (MPa, psi or bar) and an external round gauge is available as an option. Thread is PT as standard; G (BSPP) and NPT are orderable options. Brackets are optional on this family - this code omits one.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we do not quote a flow figure here. Ask us to confirm sizing against your application and the datasheet curves 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, not as a single rated figure, so we do not quote a flow number on the product page. Tell us your application and required flow and we will confirm the sizing against the datasheet curves on request before you order.
The blank drain code on a GFR is the differential-pressure drain: it discharges accumulated condensate automatically when the pressure drop across the 40 um element rises, so there is no drain fitting to operate day to day. If you prefer a fully automatic drain or a simple manual drain, those are available as order options (codes A and M) on this family.
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.