The AirTAC GFR30008NWTK 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 differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR30008NWTK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds a set downstream pressure. This configuration has a 1/4 in NPT port, a 5 um filter element (the finer of the two grades), a differential-pressure drain on the polycarbonate bowl, a standard regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range, and a built-in reverse/check valve that holds downstream pressure if the supply dips. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. No gauge is fitted; a mounting bracket is included.
This is a genuine AirTAC part. The GFR series is made in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of PT, G or NPT thread, 40 um or 5 um filtration, differential-pressure, automatic or manual drains, gauge options, and an optional reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application.
| Model | GFR30008NWTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard 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) |
Point-of-use preparation for a carton sealer's pneumatic cylinders: the 5 um element protects valve and cylinder seals from water and debris, the regulator holds a steady setting, and the check valve keeps the drop pressurised during brief supply dips.
Air supply for sorting gates and stopping stations along a conveyor line: the regulator keeps actuator settings consistent between stations, and the differential-pressure drain bleeds accumulated water from the bowl without interrupting the line.
Feed for spray guns in a small paint or coating booth: the 5 um element catches particulate that would blemish the finish, the regulator sets the gun supply pressure, and the included bracket mounts the unit neatly at the booth wall.
Size and port set the air-handling capacity: the GFR300 step carries a 1/4 in port, while the larger 400 and 600 sizes move more air. Because flow is published as curves rather than a single rated figure, send us your flow and pressure requirements and we will confirm sizing from the datasheet before you order. This unit already specifies a 5 um element, a differential-pressure drain, a reverse/check valve and NPT thread; if you would prefer 40 um filtration, a manual or automatic drain, no check valve, a gauge with an MPa, psi or bar scale, or a G (BSPP) thread, those are catalogue options on the same series.
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 GFR300 flow as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the datasheet curve and check the sizing for your application before you order.
The N in the code means no gauge is fitted. Gauges are a catalogue option on the GFR series - an embedded square gauge or an external round gauge, with MPa, psi or bar scales - so you can order a gauge-equipped variant of the same series or add a gauge downstream.
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.