The AirTAC GFR300C08MJF3WT AirTAC Filter Regulator NPT 1/4 in 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 GFR300C08MJF3WT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This 300-size unit is tapped 1/4 in NPT, carries a 5 um filter element for finer filtration than the standard 40 um grade, drains by hand through its manual drain, and shows the setting on the embedded square gauge scaled in bar. Maximum inlet pressure is 1.0 MPa (145 psi), the regulating range is 0.05-0.9 MPa (7-130 psi), and the working temperature span 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 your choice of drain type, filter grade, gauge scale, thread (PT standard; G and NPT to order), bracket and reverse valve. Flow for this family is published as curves rather than a single rating, so ask us to confirm the figures for your application and we will send the datasheet.
| Model | GFR300C08MJF3WT AirTAC Filter Regulator NPT 1/4 in |
|---|---|
| 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 prep for a small press or clamping fixture: the 5 um element keeps scale and pipe debris out of the downstream valve stack while the regulator holds a steady setpoint for repeatable clamping force, with the bar gauge giving the operator a visible pressure check.
Local supply for packaging machinery cylinders and grippers, where the manual drain lets an operator bleed accumulated water at shift start and the regulator keeps actuator speed and sealing consistent along the line.
Filtered, regulated air for spray guns and coating equipment, where water and 5 um-grade particle removal help protect finish quality and the square bar gauge lets booth staff verify supply pressure at a glance.
Size and port step up with demand: the GFR family runs 200, 300, 400 and 600 across 1/8 in to 1 in ports, so choose the size whose flow curve covers your air consumption - we can check the curve against your application before you order. On this unit the choices are already decoded: a 5 um element instead of the standard 40 um, manual drain (which also permits the wider 0.05-0.9 MPa / 7-130 psi regulating range), square gauge in bar, NPT thread, no bracket and no reverse valve. If you would rather drain automatically, prefer a psi or MPa gauge scale, or need a bracket, those variants exist in the same family - just ask.
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 family as curves rather than a single rated figure, so we do not quote a number here. Ask us for the datasheet and we will confirm the flow curve for the 300 size at your operating conditions so you can size the unit against your actual air consumption before ordering.
This configuration drains by hand: an operator opens the drain to bleed off collected water, which suits lines that are checked routinely, and it permits the wider 0.05-0.9 MPa (7-130 psi) regulating range. If you prefer automatic or differential-pressure draining, those variants exist in the same GFR300 family - we can identify the equivalent code for you.
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.