The AirTAC GFR300C10MLJC3T 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 GFR300C10MLJC3T is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single 300-size body with a 3/8 in NPT port. This configuration is built as a low-pressure type, so the regulator side is intended for circuits that run well below standard line pressure; the exact adjustment range for the low-pressure type is not published in the standard tables, so confirm it against your setpoint before ordering. It carries the standard 40 um filter element, a manual drain you operate by hand to clear collected condensate, a round pressure gauge reading in bar, and no mounting bracket or check valve.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of manual, automatic or differential-pressure drains, a 5 um element option (code W), square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm flow and other datasheet values on request for your application.
| Model | GFR300C10MLJC3T 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) |
On fixture and clamping manifolds that hold workpieces at reduced pressure, this filter regulator cleans the supply and holds the low regulated setting, with the bar-scale gauge giving the operator a direct reading at the station.
Packaging machines with low-pressure actuator circuits need water and dirt removed upstream of the valves. This 300-size unit filters the supply and regulates it in one body, and the manual drain lets maintenance clear condensate during scheduled rounds.
At bench drops feeding low-pressure pneumatic tooling and small actuators, this unit combines filtration and regulation in a single 3/8 in connection, keeping the bench supply clean and set to the pressure the task calls for.
Start with the port step: this unit is 300 size with a 3/8 in NPT port, one of the steps from 1/8 to 1 inch across the GFR range, and the size you pick should follow the air demand of the circuit rather than the pipe alone. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering. Then settle the decodable options: drain type (manual like this unit, operated by hand, versus automatic or differential-pressure), filter grade (40 um standard, 5 um with code W where finer filtration is needed), gauge style and scale (this one is a round gauge in bar; square embedded gauges and MPa or psi scales are alternatives), thread family (PT is the AirTAC standard, with G and NPT as order options), and whether a mounting bracket is wanted. This unit is the low-pressure regulator type, so verify its adjustment range suits your setpoint; a check valve can be specified on other variants.
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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and other datasheet figures for this exact model on request before you order.
The M in the code specifies a manual drain: condensate collected in the bowl is released by hand, which suits stations serviced on a regular schedule. The GFR family also offers automatic (code A) and differential-pressure (blank) drains, so you can order the drain type that matches how the unit will be maintained.
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.