The AirTAC GFR300C08MNWT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08MNWT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your set point in a single body. This size 300 unit is tapped 1/4 in NPT, carries a 5 um filter element, and uses a manual drain, so the bowl is emptied by opening its drain valve during routine checks. The standard regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and operating temperature is -5 to 70 C, non-freezing. No gauge is fitted; a mounting bracket is included, and the bowl on this 300 size is polycarbonate (only the 600 size uses aluminium alloy).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and can be ordered with automatic, manual or differential-pressure draining, a 40 um or 5 um element, an embedded square gauge or an external round gauge in MPa, psi or bar scales, PT, G or NPT threads, and with or without a bracket. We confirm flow and other datasheet figures on request, since flow is published as curves rather than a single rating.
| Model | GFR300C08MNWT AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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) |
Fitted ahead of the tool-change cylinder and air-blast circuit on a CNC machining centre, it filters the supply to 5 um and holds the regulated pressure the clamp circuit was set up for.
Mounted at the drop point on a carton packaging line, it conditions the air feeding diverter and sealing cylinders, with the manual drain emptied during scheduled line checks.
Installed upstream of a solenoid valve bank on a bottling line, it removes water and particles that would score valve spools and keeps supply pressure steady at the set point.
Choose the size and port against the air your circuit actually uses: sizes 200, 300, 400 and 600 step up in port and flow capacity, and this unit sits at size 300 with a 1/4 in NPT port. Pick the drain to match access: manual (this unit) suits points someone visits routinely, automatic suits hard-to-reach drops, and differential-pressure is the catalogue default. Choose the 5 um element (this unit) where finer cleanliness matters, or the 40 um standard for general lines. Gauge type and scale (MPa, psi or bar), PT, G or NPT threads, and the bracket are all decodable options. Flow is published as curves, not a single rating, so 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 G-series flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and other datasheet figures for this 1/4 in NPT filter regulator on request.
The M in this code selects a manual drain: the bowl is emptied by opening its drain valve during routine checks. Choose automatic draining instead where the unit sits at an inaccessible drop, or the differential-pressure default where draining should follow pressure changes. The 0.05-0.9 MPa (7-130 psi) regulation range applies to this manual-drain unit.
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.