The AirTAC GFR300C08MJC2 AirTAC Filter Regulator PT1/4, 40 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 GFR300C08MJC2 is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration is threaded PT1/4 (1/4 in), carries the standard 40 um filter element, and uses a manual drain, so condensate is released by opening the drain valve during checks rather than automatically. Pressure is set with the fitted round psi gauge, the regulator is the standard type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and no bracket or reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, PT, G or NPT threads, manual, automatic or differential-pressure drains, a 5 um (code W) filter element, gauge style and scale, and bracket options. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08MJC2 AirTAC Filter Regulator PT1/4, 40 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) |
Clean, regulated air feeding the directional valves and cylinders on a cartoning or wrapping line, with the 40 um element protecting seals and the psi gauge giving operators a visible setpoint.
Point-of-use conditioning for tool-change clamps and chip-sweep nozzles on a machining centre, where steady downstream pressure keeps clamping behaviour repeatable shift after shift.
A filtered, pressure-adjusted drop at a lab bench serving air-operated pumps or test fixtures, with manual drain suiting a supervised environment and the psi gauge simplifying daily verification.
Start with the port: this unit is PT1/4, so it suits lines plumbed at 1/4 in; step up to a 400 or 600 size if your piping and air demand are larger. Choose the drain to match maintenance habits: manual (as here) needs someone to open the drain, automatic handles condensate unattended, and differential-pressure drains only when the element loading justifies it. The standard 40 um element covers general plant air; specify the 5 um W grade where finer filtration is needed. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. PT is the standard thread, with G and NPT available as order options, and a mounting bracket can be added if this no-bracket version does not suit your panel. Flow for this family is published as curves, not a single rating, so send us your application details and we will confirm sizing against 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 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 relevant flow figures from the datasheet before you order.
This configuration is coded M for a manual drain, meaning condensate is released by opening the drain valve during routine checks. If you want condensate handled without operator attention, the same GFR300 size is available with an automatic (code A) or differential-pressure drain - just ask for that variant.
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.