The AirTAC GFR300C08MJF2W AirTAC Filter Regulator PT1/4, 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 AirTAC GFR300C08MJF2W is a GFR-series filter regulator: water-and-particulate filtration and pressure regulation combined in a single body for compressed air. This 300-size unit is threaded PT1/4 (1/4 in), carries the fine 5 um filter element (40 um is the standard grade), drains condensate by hand via its manual drain, and is fitted with an embedded square gauge scaled in psi. The regulator is the standard type, adjustable from 0.05 to 0.9 MPa (7-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). The bowl is metal, the working temperature range is -5 to 70 C (non-freezing), and this configuration is supplied without a mounting bracket.
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 options across the range include manual, automatic or differential-pressure drains, 40 um or 5 um elements, embedded square or optional external round gauges with MPa, psi or bar scales, G and NPT thread variants, mounting brackets, a low-pressure regulator type and a reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C08MJF2W AirTAC Filter Regulator PT1/4, 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) |
Point-of-use air preparation for clamps, tool-changer cylinders and air-blast nozzles on a machining centre, with the 5 um element protecting fine-seal components downstream of the unit.
Filtering and regulating air to carton-sealing and case-erector cylinders on a packaging line, with the square psi gauge letting operators set and check line pressure at a glance.
Clean, regulated compressed air for pneumatic test benches and lab automation, where the fine 5 um grade and a manual drain suit attended, routinely checked installations.
Size and port step up together across the GFR range: 200, 300, 400 and 600 cover 1/8 in to 1 in, so choose the size whose flow curve covers your demand at your working pressure. On this configuration the decodable choices are already fixed: 300 size at PT1/4, the 5 um fine element instead of the 40 um standard, a manual drain, a square gauge scaled in psi, PT thread, standard regulator (0.05-0.9 MPa / 7-130 psi) and no mounting bracket. If you would rather have automatic or differential-pressure draining, a 40 um element, an MPa or bar gauge scale, G or NPT threads or a bracket, those are all order options on the GFR300.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated figure, so we do not quote a flow number here. Tell us your flow and working pressure and we will confirm against the datasheet that this 300-size unit is the right step 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 as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm from the datasheet whether this 300-size, PT1/4 unit is correctly sized for your application.
This configuration uses a manual drain: condensate is drained by hand, which suits attended installations where someone checks the unit as part of a routine. If the unit will sit in a hard-to-reach position or run unattended, the automatic-drain or differential-pressure-drain versions of the GFR300 are the better choice, and both are available as order options.
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.