The AirTAC GFR300C08MLJC2 AirTAC Filter Regulator 1/4 PT 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 GFR300C08MLJC2 is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds a regulated downstream pressure. This configuration is built for 1/4 in PT ports, uses a manual drain on its metal bowl, carries the standard 40 um filter element, and is the low-pressure type for circuits that run below standard plant line pressure. It is supplied with an external round gauge scaled in psi, and has no mounting bracket and no reverse/check valve.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with choices of drain type, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT threads, and brackets. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08MLJC2 AirTAC Filter Regulator 1/4 PT 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Feeds filtered, regulated air to the clamp cylinders on a milling or drilling fixture, holding steady clamping pressure below the plant line pressure while the 40 um element keeps the clamp valves clean.
Prepares the air feeding the pusher and forming cylinders on a carton-packaging station; the manual drain is bled during scheduled shift checks where an operator is already present.
Conditions the supply to a low-pressure test rig or instrument panel, where the low-pressure type regulator provides gentle downstream control and the round psi gauge gives a direct local reading.
Size and port set the air capacity: this unit is size 300 with a 1/4 in PT port; step up to 400 or 600 when the circuit needs more air. Drain choice matters: a manual drain needs periodic bleeding by an operator, while automatic and differential-pressure drains discharge condensate on their own - this unit is manual. Filtration is the standard 40 um element; specify the W option for 5 um when finer particulate removal is required. The fitted round gauge is scaled in psi; an embedded square gauge and MPa or bar scales are the alternatives. Thread is PT as standard, with G (BSPP) and NPT available to order, and a bracket is optional (this configuration has none). Because flow is published as curves rather than a single rated figure, 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 this series as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your application and we will confirm the datasheet flow figures for this 1/4 in PT, size 300 unit on request.
A manual drain releases collected condensate from the bowl only when an operator opens it, which suits attended installations with regular checks. The GFR series is also available with automatic or differential-pressure drains that discharge condensate without attention, if you would prefer that behaviour.
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.