The AirTAC GFR300C10MLJF2T AirTAC Filter Regulator 3/8in NPT 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 AirTAC GFR300C10MLJF2T is a filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 300 unit is threaded NPT 3/8 in, carries a manual drain on its polycarbonate bowl, uses the 40 um standard filter element, and is built as the low-pressure regulator type. An embedded square gauge with a psi scale is fitted; no mounting bracket and no reverse/check valve are included on this code. 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. The GFR300 series is one of four sizes (200, 300, 400, 600) with port options from 1/8 to 1 in, PT as standard and G or NPT to order, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um (code W) filtration, and gauge or no-gauge builds. Flow for this series is published as curves rather than a single rating, so ask us to confirm the figures from the datasheet for your application before you order.
| Model | GFR300C10MLJF2T AirTAC Filter Regulator 3/8in NPT |
|---|---|
| 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, regulated low-pressure air to the cylinder and gripper circuits of a carton-forming and sealing line, with the psi gauge letting operators set and check the supply at the machine.
Conditioning the air to a low-pressure clamping fixture on a machining centre, where the filter keeps moisture and chips out of the clamp cylinders and the regulator holds a gentle, repeatable clamp force.
Filtering and regulating the air fed to spray guns in a paint finishing booth, where clean, dry, low-pressure atomizing air protects finish quality and the manual drain suits end-of-shift bowl bleeding.
Size and port set the air capacity: this 3/8 in NPT, size 300 build suits mid-size circuits, and you step up to 400 or 600 (or down to 200) when the port or expected flow changes. Drain type matters: M here means the bowl must be bled by hand at intervals, so pick automatic (A) or differential-pressure (blank) versions for unattended duty. Filtration is the 40 um standard; specify W for the 5 um element where finer protection is needed. The fitted square gauge reads in psi, with MPa or bar scales as alternatives. Thread is NPT on this code, PT is the standard and G is available to order, and J means no bracket is fitted. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing 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 the GFR300 series as curves rather than a single rated figure, so no one number is quoted here. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
The M in the code means the bowl must be drained by hand at regular intervals. If the unit will run unattended or sees heavy condensate, the automatic (A) or differential-pressure (blank) drain versions of the same GFR300-10 build are the better choice.
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.