The AirTAC GFR300C08MLC1T AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR300C08MLC1T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air through a 40 um element and regulates downstream pressure in the same compact body. This 300-size unit is built for low-pressure circuits, carries a 1/4 in NPT port, and drains collected condensate by hand via its manual drain on a metal bowl. It is supplied with a round pressure gauge scaled in MPa and a mounting bracket, and is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including automatic, manual or differential-pressure drains, a 5 um (code W) filter element, square or round gauges with MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08MLC1T AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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) |
Fixture clamps and swing cylinders that hold parts at reduced pressure get filtered air and a locally set, low regulated pressure from one body, with the round MPa gauge giving the operator a direct setting reference.
At the point where air drops to a packaging or labelling machine, this unit strips water and 40 um particulate from the supply and holds a gentle regulated pressure for delicate actuation, with the manual drain emptied during scheduled changeovers.
Laboratory rigs and pilot-scale pneumatic test benches that run well below normal shop pressure use the low-pressure regulator type to set fine working pressures, with NPT1/4 plumbing matching standard instrumentation fittings.
Start with the port step: this unit is 1/4 in NPT on the 300 frame; step up to 400 or 600 when the circuit needs a larger port and more flow, or down to 200 for compact lines. Choose the drain to match maintenance habits: manual (as here) suits attended installations, automatic suits unattended duty, and differential-pressure drains only when a minimum pressure differential is available. Filter grade is 40 um standard; specify the W code for a 5 um element where finer protection is needed. Gauges can be the embedded square type or an external round gauge, scaled in MPa, psi or bar; threads can be ordered in PT (standard), G (BSPP) or NPT; brackets are optional on most sizes.
One honest note before ordering: AirTAC publishes flow as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm sizing against the datasheet before you commit.
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 rather than a single rated figure, so we do not quote a number here. Tell us your working pressure and required flow and we will confirm the datasheet curve for this 300-size, 1/4 in NPT unit before you order.
The M in the code selects the manual drain: condensate collected in the metal bowl is emptied by hand, which suits installations that are checked regularly. AirTAC also offers automatic drains and differential-pressure drains on GFR units, and the drain choice affects the regulator's adjustment range, so pick the type that matches how the machine is maintained.
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.