The AirTAC GFR300-10G AirTAC Filter Regulator, G3/8, 40 um 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 GFR300-10G is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has G3/8 (BSPP) ports, 40 um standard filtration, a differential-pressure drain that bleeds condensate automatically as flow passes through, and a round pressure gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl keeps the condensate and filter element visible for inspection.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) that step up in port size and flow capacity. Across the GFR range you can order automatic or manual drains, a 5 um (W) filter grade, different gauge scales, G or NPT threads, and a mounting bracket. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-10G AirTAC Filter Regulator, G3/8, 40 um |
|---|---|
| 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 — round, 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). |
| C | Gauge shape: Round. 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) |
Point-of-use conditioning on a machining centre's pneumatic supply: the 40 um element strips water and swarf-laden particulate before the regulator sets a stable pressure to the tool changer, clamps and air jets.
Feeding pick-and-place and carton-sealing cylinders on a packaging conveyor, where the regulator holds a consistent set pressure so actuator stroke speed stays repeatable through the shift.
A dedicated G3/8 drop at an assembly workstation: clean, regulated air for air screwdrivers, clamps and small actuators, with the psi gauge letting operators verify line pressure at a glance.
Choose the size and port step against the air demand of the circuit: the GFR300 with 3/8 in ports sits mid-range in the GFR family, with smaller 200 and larger 400/600 sizes available when flow requirements differ. The differential-pressure drain on this unit is the fit-and-forget choice; specify automatic drain (A) for unattended condensate removal or manual drain (M) where you want positive control. Filtration is 40 um standard here; order the W option for 5 um where downstream equipment needs finer protection. The round gauge on this unit reads in psi; MPa and bar scales are also available, and an embedded square gauge is the catalogue alternative. Thread is G (BSPP) on this unit, with PT standard and NPT as order options. A mounting bracket is optional (J = no bracket on this unit).
Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering.
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 GFR300 series as curves, not as a single rated number, so we do not quote a figure here. Tell us your operating pressure and air demand and we will confirm the flow and datasheet figures for this exact model on request before you order.
The differential-pressure drain on this unit discharges collected condensate automatically whenever the pressure differential across the drain reaches its threshold, so no manual intervention is needed. If you prefer positive control or fully unattended operation, the same GFR300 body is available with a manual drain (code M) or automatic drain (code A); the regulation range differs by drain type, with manual-drain versions able to adjust down to 0.05 MPa.
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.