The AirTAC GFR300-10 AirTAC Filter Regulator, G3/8, 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 AirTAC GFR300-10 is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration carries a G3/8 (3/8 in) G-thread port, a 40 um standard filter element, a differential-pressure drain that bleeds collected condensate whenever the pressure drop across the element rises, and an embedded square gauge reading in psi. The standard regulator covers a 0.15-0.9 MPa (20-130 psi) setting range with a maximum inlet pressure of 1.0 MPa (145 psi), and the polycarbonate bowl suits operating temperatures from -5 to 70 C (non-freezing). No mounting bracket is fitted on this variant.
This is a genuine AirTAC part. The GFR family is offered in 200, 300, 400 and 600 sizes 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 scales in MPa, psi or bar, and PT, G or NPT threads as order options. Published flow data appears as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator, G3/8, Square psi Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | 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. 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. |
| G | G (BSPP) 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Installed ahead of a pneumatic press station, the unit strips water and pipe scale from the shop air supply and holds a steady, operator-set working pressure so the press cylinder strokes consistently through each shift.
Mounted at the drop to a packaging machine's valve manifold, it cleans condensate and debris out of the supply and regulates the pressure feeding the sealing and clamp cylinders, protecting the downstream valves from dirty, unregulated air.
Fitted on the supply line to lab automation and analytical equipment, it removes moisture and particulates from the compressed air feed and lets a technician set and read the exact supply pressure the instrument requires on the psi gauge.
Start with the size and port: 200, 300, 400 and 600 step up in port and flow capacity, so match the 3/8 in G3/8 port on this unit to your line size and the air demand of the equipment it feeds. Then pick the drain: differential-pressure (this unit) drains automatically as the element loads, automatic drains on a timed or level basis, and manual drain suits installations visited regularly. Choose the 40 um standard element for general plant air, or the 5 um W option where finer protection is needed. The embedded square gauge is standard with MPa, psi or bar scales; this variant reads psi, and an external round gauge is available as an option. Thread is PT as standard with G and NPT as order options, and a mounting bracket can be added where the J no-bracket build does not suit. Flow for this family is published as curves rather than 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. 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 rather than a single rated figure, so no one rated flow number exists to quote. We can confirm the flow curve and full datasheet figures for the GFR300-10 on request so you can check it against your air demand before ordering.
The differential-pressure drain on this GFR300-10 discharges collected condensate automatically whenever the pressure drop across the 40 um element rises, so it suits unattended installations. If you prefer, the family is also available with an automatic drain or a manual drain, selectable at order time.
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.