The AirTAC GFR30008MLNWTK AirTAC Filter Regulator NPT1/4, 5 um 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 AirTAC GFR30008MLNWTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded NPT1/4 (1/4 in), carries the finer 5 um filter element (the W grade, instead of the 40 um standard), drains accumulated condensate by hand via the manual drain, and is built as the low-pressure regulator type. A reverse/check valve is fitted, no gauge is supplied, and a mounting bracket is included. The polycarbonate bowl lets you see the condensate level at a glance.
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, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge options, and PT, G or NPT threads. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet values for your application on request.
| Model | GFR30008MLNWTK AirTAC Filter Regulator NPT1/4, 5 um |
|---|---|
| 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (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. |
| 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) |
Fixture clamps and swing cylinders on an assembly line run at reduced pressure; this low-pressure-type filter regulator filters the shop air to 5 um and holds the reduced setting, while the check valve holds the downstream circuit if supply is interrupted.
Carton sealers and case packers on a packaging line take 1/4 in air drops; this unit cleans and regulates the air feeding the cylinders, with the manual drain emptied during scheduled changeovers and the included bracket fixing it to the machine frame.
Test rigs and analytical instruments sensitive to water and particles use the 5 um element to polish the incoming compressed air; the low-pressure regulator type suits reduced-pressure instrument circuits, and the transparent PC bowl shows when to drain.
Step up or down through the GFR sizes (200 / 300 / 400 / 600) to match the port and flow path your line needs - here the size-300 body with a 1/4 in NPT thread. Choose the drain to suit attendance: manual (this unit, drained by hand at intervals), automatic, or differential-pressure. Pick the 5 um element (as fitted here) when downstream equipment needs finer filtration than the 40 um standard. Gauge, scale and thread (PT standard; G and NPT as order options) are selected at ordering, and a bracket is included with this unit.
Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order.
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, not as a single rated number, so we do not quote a figure here. Tell us your inlet pressure and required downstream flow and we will confirm the correct size from the datasheet on request before you order.
In the code GFR30008MLNWTK, M selects the manual drain (you drain the PC bowl by hand rather than automatically), and N means no gauge is fitted - a gauge can be ordered as an option if you want to read the regulated pressure. The unit is also the low-pressure regulator type (L) with a reverse/check valve (K) fitted, and the 5 um filter element (W) in place of the 40 um standard.
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.