The AirTAC GFR300C08MJC2W AirTAC Filter Regulator 1/4 in PT, 5 um 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 GFR300C08MJC2W is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in a single 300-size body. This configuration is threaded PT1/4 (1/4 in), carries the finer 5 um filter element, drains by hand through its manual drain, and is fitted with an external round gauge reading in psi. The standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), the polycarbonate bowl suits non-freezing compressed-air lines from -5 to 70 C, and the maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um standard or 5 um (W) filtration, embedded square or external round gauges in MPa, psi or bar scales, and optional brackets and reverse/check valves. Flow for this series is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08MJC2W AirTAC Filter Regulator 1/4 in PT, 5 um |
|---|---|
| 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 pneumatic clamps and fixtures on a machining cell, holding a steady setpoint so workholding behaves the same part after part.
Sits at the drop of a carton-sealing or case-packing conveyor to clean water and debris out of the supply and set the pressure the cylinders and grippers were designed for.
The 5 um element and a set regulator give a paint or coating gun air with fine particulate removed and stable atomisation pressure, drained by hand at shift end.
Every choice in this unit is decodable from the code. Step the size (200/300/400/600) and port (1/8 to 1 in) against the flow your line needs - larger sizes flow more, and we can check the published curves against your demand. Choose the drain: manual as here, automatic, or differential-pressure (note that manual-drain units adjust from 0.05 MPa, while automatic and differential-pressure versions start at 0.15 MPa). Choose the element: 40 um standard or 5 um (W) where downstream valves and instruments need finer air. Gauges: embedded square as standard, external round optional, with MPa, psi or bar scales. Thread: PT is standard on this unit; G (BSPP) and NPT are catalogue options to order. Brackets and reverse/check valves are selectable. Because flow is published as curves, not a single rating, 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 GFR series as curves, not as a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Send us your line demand and we will confirm the sizing from the datasheet on request before you order.
Manual drain means you open the bowl drain by hand to expel collected water. On manual-drain GFR units the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi); automatic and differential-pressure drain versions adjust from 0.15 MPa. If you cannot drain regularly, ask us about the automatic-drain variant of the same size.
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.