The AirTAC GFR300C08MLC3T 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 AirTAC GFR300C08MLC3T is a filter regulator: it removes water and particulate from compressed air and holds a regulated downstream pressure in one body. This size 300 unit is threaded NPT1/4 (1/4 in), carries the standard 40 um filter element, and is the low-pressure regulator type fitted with an external round gauge scaled in bar. The bowl is metal with a manual drain, a mounting bracket is included, and the unit takes 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 family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options including automatic or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges in MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. AirTAC publishes flow as curves rather than a single rated figure, so we do not quote a number here - ask us and we will confirm the datasheet figures for your application.
| Model | GFR300C08MLC3T 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) |
Feeding filtered, regulated air to a solenoid-valve manifold on a packaging machine, where the low-pressure setting protects downstream actuators and the 40 um element keeps valve spools clean.
Point-of-use regulation for pick-and-place grippers on a robotic welding cell, with the manual drain bled at shift start and the round bar gauge giving operators a visible setpoint.
Regulating supply to cylinder-driven diverters and capping heads on a bottling line, with the included bracket allowing the unit to be mounted beside the machine's air drop.
Size and port step up together: 200, 300, 400 and 600 cover 1/8 to 1 inch, so choose the size whose flow curve covers your demand rather than upsizing blindly - ask us to check the curve. Drain choice matters: this unit has a manual drain, so accumulated water must be bled from the bowl by hand at intervals; automatic (code A) and differential-pressure (blank) drains are available in the family. Filtration is 40 um standard; specify W for the 5 um element where downstream equipment needs finer air. The gauge on this unit is an external round type scaled in bar; embedded square gauges in MPa, psi or bar scales are the family standard. Thread is NPT here; PT is the AirTAC standard and G (BSPP) is an order option. A mounting bracket is included. Because flow is published as curves rather than a single rating, confirm sizing against your application with us 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 GFR flow as curves, not a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curve and sizing for the GFR300 at 1/4 in before you order.
The M in the code sets a manual drain: accumulated water must be bled from the bowl by hand at intervals. If you prefer unattended drainage, the same family offers automatic (code A) and differential-pressure (blank) drains - ask us to quote the 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.