The AirTAC GFR30008MLC3T 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 PT1/4" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR30008MLC3T is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body, so one 1/4 in NPT connection both cleans the compressed air and sets the downstream pressure. This configuration carries a manual-drain polycarbonate bowl, a 40 um standard filter element, a low-pressure regulator type, and a round pressure gauge with bar scale fitted; a mounting bracket is included. 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 ports from 1/8 to 1 in, and options across the series include automatic or differential-pressure drains in place of this manual drain, a finer 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, and G or NPT threads in place of the PT standard. Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR30008MLC3T AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
A machining cell where swing clamps and hold-downs need filtered air and a steady, lower-than-line regulated pressure; this unit conditions the supply at the fixture and its manual drain is emptied during shift changeover.
Feeding cylinders and small actuators on a filling or cartoning line, where the low-pressure regulator type holds a gentle working pressure for delicate product-handling motion and the 40 um element keeps debris out of the valves.
A workbench assembly station where an operator sets a fixed, low working pressure for press-fit or seating operations; the bar-scale round gauge gives a direct local readout and the bracket mounts the unit at the frame.
Start with the port step: this unit is size 300 with a 1/4 in NPT port; larger sizes (400, 600) carry bigger ports for higher air demand, so match the size to the consumption of the circuit rather than to the pipe alone. Drain type is a real choice here: the M code on this model means the polycarbonate bowl is drained by hand at intervals, while the family also offers automatic and differential-pressure drains for unattended installations. The 40 um element is the standard grade; specify the W option if the application needs 5 um filtration. The fitted round gauge reads in bar; square or round gauges with MPa or psi scales are alternatives. Thread is NPT on this model; PT is the AirTAC standard and G (BSPP) is also an order option. A mounting bracket is included.
Note that this is the low-pressure regulator type, intended where the controlled downstream pressure sits below the standard type's range; the exact adjustment span for the low-pressure type is not published in the material we hold, so ask us to confirm it against your setpoint before ordering. Flow is published as curves, not a single rating, so send us your application details and we will confirm sizing from the datasheet.
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 figure, so we do not quote a number here. Send us your application - air consumption, working pressure and line length - and we will confirm the correct size and the flow figures from the datasheet on request.
The M in the code means the polycarbonate bowl is drained by hand at regular intervals, which suits attended installations. If the unit will sit in an unattended line, the GFR family also offers automatic drains (code A) and differential-pressure drains (the default) on the same body - just ask and we will 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.