The AirTAC GFR30008C3WTK AirTAC Filter Regulator 1/4 in NPT, 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 GFR30008C3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body, with no lubricator. This configuration is built around a 1/4 in NPT port, a 5 um filter element (the finer of the two grades offered, for cleaner air than the standard 40 um), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a round pressure gauge reading in bar. A reverse/check valve is fitted, and a mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi). The bowl on this 300 size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with manual, automatic or differential-pressure drains, 40 um or 5 um elements, and a choice of gauge styles and scales. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GFR30008C3WTK AirTAC Filter Regulator 1/4 in NPT, 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 | Fitted — round, 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 0.15 - 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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 clean, regulated air to the tool-change and clamping circuits of a machining centre, where the 5 um element protects fine pilot valves from particulate and the check valve holds downstream pressure if the main supply dips.
Conditioning the air that drives cylinders and diverters on a carton packing conveyor, with the regulator set once at the manifold so downstream actuators see a stable supply through a shift.
Supplying regulated air to sample-handling and valve manifolds in laboratory automation, where the finer 5 um grade suits sensitive pneumatic components and the differential-pressure drain keeps condensate off the bench.
Start with the port and size step: the GFR300 with its 1/4 in NPT port sits mid-range in the family, and the right size depends on the air demand of the line it feeds - because flow is published as curves rather than a single rating, ask us to confirm the fit against your application before ordering. This unit already carries the finer 5 um element (the standard grade is 40 um), the differential-pressure drain (manual and automatic drains are the other catalogue options), a round bar-scale gauge, and a reverse/check valve. Thread is NPT on this code; PT is the standard thread and G is also available to order. A mounting bracket is included.
If you would rather match the drain, element grade, gauge style or scale to your own preference, the same body is offered across those options - we can decode the alternatives for you on request.
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 there is no one number we can honestly quote. Tell us your line pressure and the air demand of the equipment you are feeding, and we will confirm the sizing against the datasheet curves on request before you order.
With no drain letter in the code, this GFR300 uses the differential-pressure drain: as air flows through the unit, the pressure difference across the element automatically bleeds collected condensate from the bowl, with no manual intervention. Manual (code M) and fully automatic (code A) drains are the other catalogue options if your duty cycle suits them better.
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.