The AirTAC AirTAC GFR300C10MLJC3TK Filter Regulator NPT3/8 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 GFR300C10MLJC3TK is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 300 unit carries a 3/8 in NPT port, a manual drain on a metal bowl, and the standard 40 um filter element. The regulator is the low-pressure type, a round external gauge with a bar scale is fitted, and a reverse/check valve is built in. No mounting bracket is included with this code. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in and catalogue choices for drain type, filter grade, gauge and scale, thread and bracket, so a configuration can be matched to the line. Because flow is published as curves rather than a single rating, we confirm the datasheet figures for your application on request.
| Model | AirTAC GFR300C10MLJC3TK Filter Regulator NPT3/8 |
|---|---|
| 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 a workshop pneumatic press: the filter stage strips water and pipe scale before the regulator holds a steady low-pressure setting at the press valve, with the built-in reverse-flow protection on the line and the bar gauge giving a visible setpoint.
A carton-sealing or case-packing conveyor line running air cylinders and grippers: one filter regulator at the drop leg cleans the supply and regulates it down to the low working pressure the actuators were set up for, with the manual drain handled at shift checks.
On an assembly plant ring main, a filter regulator at each work-station drop keeps condensate and debris out of the tools while holding the station pressure; the manual drain suits drops that are blown down as part of the start-of-shift routine.
Size and port set the air capacity: this unit is size 300 with a 3/8 in NPT port, so match the step to the air demand of the circuit it feeds. Drain type is a real operating choice: this configuration uses a manual drain, so the bowl is drained by hand, which suits attended installations; automatic and differential-pressure drains are available elsewhere in the family where the bowl cannot be attended. The 40 um element is the standard grade and the 5 um W option is orderable for finer filtration. The fitted round gauge reads in bar, with MPa and psi scales as the other catalogue choices. Thread here is NPT; PT is the standard and G (BSPP) is an orderable option. No mounting bracket is included with this code. Flow is published as curves, not a single rating, 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 GFR300 as curves rather than a single rated figure, so quoting one number would not be honest. Send us your line pressure and the air demand of the equipment it will feed, and we will confirm the sizing from the datasheet on request.
The M in the code sets a manual drain: the metal bowl is drained by hand, which suits attended installations, while automatic and differential-pressure drains are catalogue alternatives. The L sets the low-pressure regulator type, intended for low-pressure duties; the exact adjustable range for this variant is not published, and we confirm it on request.
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.