The AirTAC GFR30008MLF2WTK AirTAC Filter Regulator NPT1/4 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 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 GFR30008MLF2WTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This size 300 unit is configured with a 1/4 in NPT port, a 5 um filter element (code W) for finer filtration than the standard 40 um, a manual drain for the polycarbonate bowl, and the low-pressure regulator type for circuits that operate at reduced set pressures. It also carries a built-in check (reverse) valve, an embedded square gauge reading in psi, and includes a mounting bracket. 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 is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge scale, thread (PT standard; G and NPT as order options) and bracket. Flow is published by AirTAC as curves rather than a single rated figure, so we confirm flow and datasheet figures for your application on request.
| Model | GFR30008MLF2WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (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, psi 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. |
|---|---|
| 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding filtered, regulated air to the tool-change clamps and air bearings on a machining centre, where the 5 um element protects fine pilot valves and the check valve holds set pressure during supply dips.
Conditioning the air feeding cylinder-driven carton forming and sealing stations on a packaging conveyor, with the manual drain emptied during scheduled line checks and the psi gauge giving operators a local set-point readout.
Supplying low-pressure regulated air to purge and pressurise analytical instrument enclosures, where the low-pressure regulator type, fine 5 um filtration and polycarbonate bowl suit a benchtop, monitored installation.
Size and port: the 300 frame with a 1/4 in NPT port suits lines where the required flow sits in the mid range of the GFR family; step up to size 400 or 600, or down to size 200, if your flow demand differs - we can check the published flow curves against your application before you order. Filtration: this unit carries the 5 um element (code W) instead of the 40 um standard, the right choice when downstream valves or instruments need finer air. Drain: the manual drain means an operator opens the bowl drain periodically, which suits installations that are checked routinely; automatic or differential-pressure drains are available if you prefer unattended moisture removal. Gauge: the embedded square gauge here reads in psi; MPa or bar scales and an external round gauge are options. Thread: PT is the AirTAC standard and G (BSPP) or NPT are order options - this unit is specified NPT. A mounting bracket is included, and the built-in check valve holds downstream pressure when upstream supply is interrupted. Note that the low-pressure regulator type is intended for reduced set pressures; its exact adjustment range is not published in the material we hold, so ask us to confirm it against your set point.
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 the GFR series as curves rather than a single rated figure, so we do not quote a rated flow number for this unit. Send us your inlet pressure, set pressure and required flow and we will confirm sizing against the datasheet curves on request before you order.
The M in the code specifies a manual drain: moisture collected in the polycarbonate bowl is released by opening the drain when the bowl is checked. If the unit will be installed where it is not inspected routinely, the same GFR300-08 configuration is available with an automatic drain (code A) or the differential-pressure drain (no code) - 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.