The AirTAC GFR300-10 AirTAC Filter Regulator PT3/8 with 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 holds downstream pressure steady, in one body. This configuration carries a 3/8 in PT port, a manual-drain polycarbonate bowl, a 40 um standard filter element, and a standard regulator with an adjustment range of 0.05-0.9 MPa (7-130 psi). An embedded square gauge scaled in psi is fitted, a reverse (check) valve is included, and no mounting bracket is supplied.
This is a genuine AirTAC part in the GFR300 series, one of four GFR sizes (200, 300, 400, 600) covering ports from 1/8 in to 1 in. Across the range you can order automatic, manual or differential-pressure drains, a 5 um element (code W), gauge scales in MPa, psi or bar, G or NPT threads, and bracket options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator PT3/8 with psi Gauge |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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) |
Feeding a bench-mounted pneumatic press on an assembly line: the 40 um element keeps water and swarf out of the press valve, the regulator holds the setting the operator dials in, and the check valve keeps the downstream pressure from bleeding back if the main supply dips.
Supplying the air cylinders on a carton-sealing or filling machine: clean, regulated air at a stable pressure keeps cylinder stroke timing consistent through the shift, and the manual drain bowl is emptied during the planned end-of-shift maintenance walk.
A point-of-use drop feeding spray guns or air tools at a finishing station: the filter stage knocks water and pipe scale out of the plant air before it reaches the gun, and the psi-scaled gauge lets the operator set and verify line pressure at the station.
Sizing starts with the port step: the 300 size with a 3/8 in PT port suits circuits where a 1/4 in unit would restrict flow and a 1/2 in unit would be oversized - match the size to the air demand of the circuit, and we will confirm the flow curve against your application before you order. The remaining choices are all decodable from the code: manual drain (code M, bowl emptied by hand on a schedule) versus automatic (A) or differential-pressure (blank) drainage; 40 um standard filtration versus the 5 um W element; gauge scale in MPa, psi or bar; PT versus G (BSPP) or NPT thread; and bracket or no bracket. This unit is supplied as decoded: no bracket, square psi gauge, check valve fitted.
Note the drain-type effect on adjustment: the manual-drain version regulates from 0.05-0.9 MPa (7-130 psi), while automatic and differential-pressure drain versions regulate from 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
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 this series as curves, not as a single rated figure, so there is no honest one-number answer we can print. Send us your line pressure, set pressure and air demand, and we will confirm the flow from the datasheet curve for the GFR300 at 3/8 in on request before you order.
The M in the code GFR30010MJF2K means a manual drain: the polycarbonate bowl is drained by hand on a schedule. Automatic (code A) and differential-pressure (blank) drain versions of the same size are available to order. Note the trade-off: the manual-drain version regulates from 0.05-0.9 MPa (7-130 psi), while the automatic and differential-pressure versions regulate from 0.15-0.9 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.