The AirTAC GFR300C10MLC3TK AirTAC Filter Regulator NPT3/8 Low-Pressure 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 GFR300C10MLC3TK is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates the downstream pressure. This size 300 configuration carries a 3/8 in NPT port, a manual-drain polycarbonate bowl, the standard 40 um filter element, a low-pressure regulator type, a round external gauge with bar scale, and a built-in reverse (check) valve; the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR300 series, one of four frame sizes (200/300/400/600) with ports from 1/8 to 1 in. Across the GFR line you can order PT (standard), G or NPT threads, manual, automatic or differential-pressure drains, a 5 um element option, and different gauge styles and scales. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C10MLC3TK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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) |
Feeding filtered, low-pressure regulated air to clamp fixtures on a CNC machining line, where the check valve holds the set circuit and the manual drain is bled during shift changeover.
Conditioning the air supply to carton-sealing jaws and gripper cylinders on a packaging conveyor, with the 40 um element protecting valve spools from water and particulate carryover.
Providing clean, finely reduced air to bench-top test rigs and lab apparatus that run at reduced pressures, where the round bar-scale gauge gives a clear local set-point reading.
Size and port set the air capacity: this unit is size 300 with a 3/8 in NPT port, so step up to 400 or 600 if your demand sits near the top of the flow curve, or down to 200 for compact circuits. Drain type is a real choice: this code has a manual drain, which you bleed periodically, while automatic or differential-pressure drains suit unattended lines. Filter grade is the standard 40 um here; specify the W option for a 5 um element where finer protection is needed. Gauge: this unit carries a round external gauge on the bar scale; an embedded square gauge and MPa or psi scales are the alternatives. Thread is NPT in this code (PT is the standard; G is also available), and the bracket is included.
One honest note on sizing: flow for this series is published as curves, not a single rated figure, so send us your air demand and operating pressure and we will confirm the correct size 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 this series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Send us your air demand and operating pressure and we will confirm the sizing against the datasheet on request.
The M in the code means manual drain: the bowl is bled by hand at intervals, which suits attended cells and daily-check routines. For unattended lines choose the automatic drain (code A) or the differential-pressure drain (the default when no drain letter appears). The bowl on this size 300 unit is polycarbonate.
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.