The AirTAC GFR300C08MLC2 AirTAC Filter Regulator PT1/4 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 AirTAC GFR300C08MLC2 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one 1/4 in (PT1/4) connection does both jobs. This configuration is the size 300 unit in the low-pressure regulator type, fitted with the standard 40 um filter element, a manual drain on the bowl, an external round gauge reading in psi, and a mounting bracket. The metal bowl is drained by hand, which suits lines with steady duty where an operator checks the bowl as part of normal rounds. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options that include automatic or differential-pressure drains, a 5 um element (code W), square or round gauges with MPa, psi or bar scales, G (BSPP) or NPT threads, and bracket choices. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08MLC2 AirTAC Filter Regulator PT1/4 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) |
On CNC fixture circuits where workpieces are held by air at reduced pressure, the GFR300C08MLC2 filters the shop air and holds the regulator setting so clamping cylinders see clean, steady air at the pressure the fixture was set up for.
Carton sealers, baggers and labelling heads run many small cylinders and air jets from one 1/4 in drop; this filter regulator conditions that drop, keeping water and debris out of the valve bank while the low-pressure type holds the machine's set pressure.
Sorting gates and pusher cylinders along a conveyor line need clean air and a stable, moderate pressure to divert product without damaging it; this unit conditions the line feed and lets the set pressure be checked at a glance on the psi gauge.
Start with the port and size: this unit is size 300 with a 1/4 in PT port, one step up from size 200; if your line may grow, step up a size rather than throttling a smaller unit. Because the exact adjustment range of the low-pressure type is not published in the standard table, ask us to confirm it against your set pressure before ordering. Drain choice matters: manual (this unit) means periodic hand draining, while automatic or differential-pressure drains suit unattended installations. The standard element is 40 um; choose the 5 um W option only where downstream valves demand finer filtration. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. Thread is PT as standard - G (BSPP) and NPT are order options, not conversions. A bracket is included with this code; J codes omit it. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing from 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 number, so there is no one figure we can quote honestly. Tell us your line pressure, set pressure and expected air demand, and we will confirm sizing against the datasheet curves for this 1/4 in, size 300 unit before you order.
The M in the code specifies a manual drain: the metal bowl is emptied by hand, which suits attended lines where someone checks the bowl during normal rounds. If the unit will sit in an unattended corner, an automatic (code A) or differential-pressure (blank) drain removes the need for that routine - the trade-off is a small continuous bleed on the differential type. Drain choice is a decode option on GF, GFR, GFC and GC units.
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.