The AirTAC GFR30008LC3WTK AirTAC Low-Pressure Filter Regulator NPT1/4 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 AirTAC GFR300 is a filter regulator: one body removes water and particulate from compressed air and regulates downstream pressure. This unit is the low-pressure type (code L) for circuits that run below standard regulator range; its exact regulation range is not published, so we confirm it on request. It carries a 5 um filter element (code W), a differential-pressure drain, a round gauge scaled in bar, and a reverse (check) valve (code K) that holds downstream pressure if the upstream supply drops. Ports are 1/4 in NPT, maximum inlet pressure is 1.0 MPa (145 psi), the operating temperature range is -5 to 70 C (non-freezing), and the polycarbonate bowl allows visual condensate checks. The mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in and PT, G and NPT thread options. Drain type, filter grade, gauge style and scale, low-pressure type and check valve are all decodable order options. Flow is published as curves rather than a single rating, so send us your application and we will confirm sizing and datasheet figures before you order.
| Model | GFR30008LC3WTK AirTAC Low-Pressure Filter Regulator NPT1/4 |
|---|---|
| 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 — 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. 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). |
| 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 a pneumatic clamping fixture on a machining cell that runs at reduced pressure: the 5 um element protects the clamp cylinder, the check valve holds the clamp if supply pressure drops, and the bar gauge gives the setter a local reading.
Supplying guide and stopper cylinders on a packaging conveyor: filtered, regulated air at low pressure avoids jarring product, and the differential-pressure drain clears condensate without stopping the line.
Regulating air to a laboratory automation skid or analytical instrument actuator where low supply pressure and clean 5 um air protect delicate pilot components; the round bar gauge supports documented set-points.
Choose the size by port and flow: this size 300 unit takes a 1/4 in port, while sizes 200, 400 and 600 step down or up; match the port to your line and confirm flow against the published curves before ordering. This unit is the low-pressure type (code L), so select it only where the circuit runs below standard regulator range; we confirm the exact range on request. The drain is differential-pressure (the default); automatic (A) and manual (M) versions exist. Filter grade is 5 um here (code W) against the 40 um standard. The gauge is the external round type scaled in bar; embedded square gauges with MPa, psi or bar scales are alternatives. Thread is NPT; PT is the standard and G is also orderable. The bracket is included; code J deletes it. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application 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 a single rated figure, so we do not quote a number here. Send us your line pressure, downstream demand and port size and we will confirm the flow from the datasheet before you order.
K means a reverse (check) valve is fitted, so downstream pressure is held if upstream supply falls. L is the low-pressure regulator type, W is the 5 um filter element, T is the NPT thread option, and C3 is the external round gauge scaled in bar.
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.