The AirTAC AirTAC GFR300C10AF3TK Filter Regulator NPT3/8 Auto Drain 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 See datasheet 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 GFR300C10AF3TK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built around a 3/8 in NPT port on the size-300 frame, with an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in bar, and a reverse/check valve that holds the downstream setting if supply is interrupted. Maximum inlet pressure is 1.0 MPa (145 psi), the regulated outlet spans 0.15-0.9 MPa (20-130 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The bowl on this size is polycarbonate (PC), and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, drain choices (differential-pressure, automatic or manual), an optional 5 um element (code W), embedded square or optional external round gauges in MPa, psi or bar scales, and G or NPT thread options to order. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | AirTAC GFR300C10AF3TK Filter Regulator NPT3/8 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (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 — factory standard, Factory standard 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. |
|---|---|
| C1 | Port size See datasheet. 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Point-of-use preparation for a CNC machining cell: water and swarf-laden particulate stripped from the shop air line with the outlet pressure set for clamps, tool changers and pneumatic actuators.
Filtered, regulated air for packaging and bottling line cylinders and grippers, where the automatic drain handles condensate on sections of the line that run unattended between shifts.
A compact filter-regulator stage inside an OEM pneumatic control panel, with the check valve holding the set pressure through supply dips and the bar-scale square gauge giving operators a local readout.
Size and port set the air capacity: this unit is size 300 with a 3/8 in NPT port, and the family steps from 200 through 400 and 600 if your circuit needs a different flow band. Drain type is a real choice - automatic (fitted here), manual, or the differential-pressure default - depending on how often the bowl is attended. Filter grade is 40 um standard or 5 um with code W; the gauge is an embedded square gauge as standard with an optional external round gauge in MPa, psi or bar scales. Thread is PT as the catalogue standard with G and NPT as order options, and a bracket is included. Flow 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 one number. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet on request.
A is the automatic drain: the bowl ejects condensate on its own instead of the differential-pressure default or a manual drain. K means a reverse/check valve is fitted, which holds the downstream setting if the upstream supply is interrupted. The element here is the 40 um standard; the finer 5 um grade would be coded W.
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.