The AirTAC GFR30010MLF1WTK AirTAC Filter Regulator NPT3/8 Low-Pressure is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 AirTAC GFR300 series combines water and particulate filtration with pressure regulation in a single body. This configuration, GFR30010MLF1WTK, is the 300 size with a 3/8 in NPT port, fitted with the fine 5 um filter element (code W) for cleaner downstream air, a manual drain you operate by hand to empty the PC bowl, a low-pressure regulator type, an embedded square gauge reading in MPa, a built-in reverse (check) valve, and a mounting bracket included. It filters and regulates compressed air only - it does not lubricate.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um fine filtration, standard or low-pressure regulation, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30010MLF1WTK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 — square, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 10 | Port size PT3/8". 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds filtered, reduced-pressure air to clamp cylinders on a CNC machining fixture, where the 5 um element helps keep dirt and water out of the clamping valves and the check valve blocks reverse flow in the circuit.
Supplies clean, regulated low-pressure air to blow-off nozzles that clear dust and film trim from cartons on a packaging conveyor, with the manual drain emptied during scheduled line cleaning.
Filters and steps down shop air for low-pressure spray, purging and drying tasks in a laboratory or pilot-line setting, where the 5 um grade and MPa gauge give cleaner air and a clear set-point readout.
Start with size and port: the 300 size with its 3/8 in NPT port suits lines running more air than a 200/1/4 in unit, but the right step depends on the flow your circuit needs - we confirm sizing against the published flow curves on request before you order. Next, choose the drain: this unit has a manual drain, which suits attended installations where an operator bleeds the bowl; automatic or differential-pressure drains suit unattended duty. Filtration: the 5 um element (W) here is the finer option over the 40 um standard - pick 5 um where downstream valves and cylinders need cleaner air. The regulator in this code is the low-pressure type; its set range differs from the standard unit and we confirm the exact range from the datasheet on request. The square gauge reads MPa (scales 1/2/3 = MPa/psi/bar, and an external round gauge is optional). Thread: PT is the AirTAC standard, with G (BSPP) and NPT as catalogue options - this unit is ordered in NPT. A bracket is included; J-coded variants omit it.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as curves, not as a single rated number, so we do not quote a figure here. Send us your line pressure, downstream demand and allowed pressure drop, and we will confirm the flow figures from the datasheet on request before you order.
The M in this code means the PC bowl is emptied by hand, which suits attended installations on a regular maintenance round. If the unit will sit unattended, the same GFR300 series is available with an automatic (A) or differential-pressure drain - tell us the duty and we will quote the right 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.