The AirTAC GFR300C08MLJC2W AirTAC Filter Regulator 1/4 in PT 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 GFR300C08MLJC2W is a filter regulator: a single GFR300 body that removes water and particulate from compressed air and regulates downstream pressure in the same unit. This configuration is built on 1/4 in PT ports, carries the 5 um filter element (code W) instead of the 40 um standard, and drains by hand through its manual drain - you release accumulated condensate yourself rather than relying on an automatic or differential-pressure drain. It is the low-pressure regulator type, a round external gauge scaled in psi is fitted (the embedded square gauge is the standard alternative, with MPa, psi and bar scales available), and the unit comes without a mounting bracket and without a reverse (check) valve. 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 GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and each size can be ordered with a different drain type, filter grade, gauge style and scale, thread (PT standard, with G and NPT as order options) and bracket choice. AirTAC publishes flow for this family as curves rather than a single rated figure, so if you need a flow number for sizing, ask us and we will confirm it from the datasheet.
| Model | GFR300C08MLJC2W AirTAC Filter Regulator 1/4 in PT |
|---|---|
| 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) |
A filter regulator feeding pneumatic clamps and vises on a CNC machining cell: the 5 um element helps protect directional valves from particulate while the regulator holds the clamp pressure the tooling was set up for.
Conditioning the air supply to cylinder-driven sealing and diverting stations on a packaging conveyor, where the manual drain fits a line an operator passes during every shift.
Supplying filtered, regulated air to small lab automation rigs and test benches that run at modest pressures and need clean, stable air at a 1/4 in connection.
The choices that matter on this unit are all in the code. Size 300 with 1/4 in PT ports sits in the middle of the GFR range; step up to 400 or 600, or down to 200, when your flow demand or piping changes, and match the port thread to your existing pipework rather than adapting down. The 5 um element (code W) suits applications that need finer particulate capture than the 40 um standard, and the manual drain suits installations where someone already walks the line and an automatic or differential-pressure drain is not wanted. The round psi gauge can be ordered with MPa or bar scales instead, or replaced by the embedded square gauge, and the thread can be specified as G (BSPP) or NPT in place of PT. One honest note on sizing: AirTAC publishes flow for the GFR family as curves, not a single rated number, so send us your flow requirement and we will confirm the right size from 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 GFR family as performance curves rather than a single rated figure, so there is no honest single number to quote. Tell us your application and required flow and we will confirm from the datasheet whether this size 300 unit with 1/4 in PT ports is correctly sized before you order.
This unit drains by hand: you open the drain to release accumulated condensate, which suits attended installations. AirTAC also publishes automatic (code A) and differential-pressure (blank, the default) drain versions of the same GFR300 filter regulator, and we can quote those if unattended draining suits your site better.
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.