The AirTAC GFR30008LF3WTK 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 GFR30008LF3WTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one 1/4 in (NPT) unit does both jobs. This configuration is the size 300 low-pressure type, fitted with a 5 um filter element (the finer of the two published grades), a differential-pressure drain that bleeds accumulated condensate automatically as flow passes through, an embedded square gauge scaled in bar, and a reverse/check valve that holds the downstream setting when upstream pressure is lost. The polycarbonate bowl lets you see the condensate level at a glance, and the included mounting bracket gives you a fixed installation point.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G and NPT threads, plus a choice of drain types, filter grades, gauge scales and low-pressure or standard regulation. Flow is published as curves rather than a single rated figure, so ask us to confirm the sizing or any datasheet figure against your application before ordering.
| Model | GFR30008LF3WTK 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 | 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 | Differential-pressure 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. 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 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) |
On a machining cell where workpieces are held by air clamps running at reduced supply pressure, this unit filters the shop air to 5 um and holds the regulated clamp pressure, with the check valve maintaining the setting if the main supply drops.
Feeding diverters, flap actuators and sealing heads on a packaging conveyor, the 5 um element protects the small control valves from particulate and condensed water while the regulator sets the gentle pressure those actuators need.
For sample-handling cylinders and pneumatic gates on laboratory automation, the fine 5 um grade and low-pressure regulation suit sensitive components, and the bar-scaled square gauge gives operators a clear local pressure readout.
Work from the port and the pressure requirement first: this unit is 1/4 in NPT in the size 300 body, and being the low-pressure (L) type it is intended where the regulated setpoint sits below what the standard version covers - the exact range for this variant is not published, so confirm it with us. Choose the 5 um element (code W) when downstream valves, cylinders or instruments need finer filtration than the 40 um standard; the differential-pressure drain suits lines with steady flow, while automatic and manual drains are the alternatives in the range. The square gauge here reads in bar; MPa and psi scales are also available, and an external round gauge is optional. NPT is ordered with the T code - PT is the catalogue standard and G is the other option. A bracket is included; J versions omit it.
Because flow is published only as curves and not as a single rated number, send us your application's flow and pressure conditions and we will confirm the correct size 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 figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm from the datasheet whether this 1/4 in size 300 unit is correctly sized for your application.
The K code fits a reverse/check valve, which holds the downstream pressure setting if the upstream supply is interrupted. The W code selects the 5 um filter element instead of the 40 um standard, giving finer protection for downstream valves and actuators. Both are decodable from the model code, along with the low-pressure regulator type and the bar-scaled square gauge.
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.