The AirTAC GFR300-10 AirTAC Filter Regulator, NPT3/8, 40 um, MPa 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 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is ordered with a 3/8 in NPT port, the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and an embedded square pressure gauge scaled in MPa. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with this drain type, and maximum inlet pressure is 1.0 MPa (145 psi). The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and each size can be ordered with manual or automatic drain, a 5 um element (code W), different gauge scales, a reverse/check valve, and G or NPT threads in place of the PT standard. We confirm flow and datasheet figures on request, since flow is published as curves rather than a single rating.
| Model | GFR300-10 AirTAC Filter Regulator, NPT3/8, 40 um, MPa Gauge |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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. |
| 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. |
| (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: the 40 um element strips water and swarf-carrying particulate from the shop air line before it reaches tool-changer and clamping circuits, while the regulator holds a steady set pressure for repeatable clamp force.
Feeding pneumatic cylinders and diverters on a packaging conveyor: clean, regulated air keeps cylinder stroke timing consistent through the shift, and the differential-pressure drain handles condensate without stopping the line for bowl emptying.
A filtered, regulated drop at an assembly workstation: the unit conditions the branch line feeding air tools and fixtures, with the MPa-scale square gauge letting operators verify set pressure at a glance.
Step through the real choices before ordering. Size and port set the capacity envelope: this 300-size unit carries a 3/8 in NPT port, and larger sizes step up to bigger ports and more flow. Drain type matters in service: differential-pressure (this unit) needs no attention during operation, automatic (code A) empties the bowl on a cycle, and manual (code M) is emptied by hand - the manual-drain version also widens the regulation range down to 0.05 MPa. Filter grade is 40 um standard; specify W for the 5 um element where finer protection is needed. Gauge options are the embedded square gauge (this unit, MPa scale; psi or bar scales available) or an external round gauge. Thread: PT is the catalogue standard, with G (BSPP) and NPT as order options - this unit is ordered NPT. A mounting bracket can be included or omitted (this unit has none).
One honest note on sizing: flow for the GFR series is published as curves, not a single rated figure, so 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 GFR series as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
This unit has the differential-pressure drain (the default): collected condensate is discharged automatically as air flows through, with no operator attention. Order code A for an automatic drain or code M for a manual drain; note the manual-drain version also allows regulation down to 0.05 MPa, while the differential-pressure and automatic versions start at 0.15 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.