The AirTAC GFR30008MF3WTK 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 GFR30008MF3WTK is an AirTAC GFR300 filter regulator: a single body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is sized for 1/4 in NPT ports, carries the fine 5 um filter element (code W) instead of the standard 40 um, and uses a manual drain, so the bowl is emptied by hand as part of routine maintenance. The embedded square gauge is fitted with a bar scale, a reverse/check valve is fitted to hold the set pressure against upstream loss, and the mounting bracket is included.
This is a genuine AirTAC part in the GFR300 size, which spans port options from 1/8 in to 1/2 in with PT, G or NPT threads, drain choices of differential-pressure, automatic or manual, 40 um or 5 um filtration, and gauge or no-gauge builds. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR30008MF3WTK 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 3 | Gauge scale: bar. 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 clamp cylinders on a machining or assembly fixture, where the 5 um element protects the clamping valves from fine particles and the regulator holds a steady clamp pressure even if the shop supply dips, thanks to the fitted check valve.
Conditioning the supply to valve terminals and actuators on a packaging line, where fine 5 um filtration and a stable regulated pressure keep directional valves cycling cleanly and the bar-scale square gauge gives operators a visible setpoint.
Supplying gauges, transducers and small test-rig actuators in a lab or QC bench, where the 5 um grade, manual drain for controlled servicing and the check valve that holds pressure during supply dips suit sensitive instrumentation.
Size 300 with 1/4 in NPT ports suits compact supply lines; step up to size 400 or 600 if the circuit demands more flow - the flow curves, not a single rating, decide the right step, so send us your air demand and we will confirm sizing before you order. The 5 um element (W) is the right choice where downstream valves, cylinders or instruments are sensitive to finer particles; the standard 40 um element remains available if coarser protection is sufficient.
The manual drain means someone empties the bowl on a schedule - choose the automatic or differential-pressure drain variant instead if the unit will sit where regular manual draining is impractical. The fitted square gauge reads in bar (MPa and psi scales are alternatives), the reverse/check valve holds the regulated pressure if the upstream supply drops, and the bracket is included for panel or surface mounting. PT is the standard thread for this family; G and NPT are order options, and this unit is built with NPT.
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 that could mislead your sizing. Send us your line pressure, downstream demand and duty, and we will confirm the relevant flow figures from the datasheet for this exact 1/4 in, 5 um configuration before you order.
The M in the code specifies a manual drain: condensate collected in the PC bowl is released by hand, which suits points that are inspected as part of a regular maintenance round. If the unit will be mounted where nobody passes regularly, ask us for the automatic or differential-pressure drain variant of the same GFR300 size instead.
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.