The AirTAC GFR300-08-L-F2-T AirTAC Filter Regulator NPT1/4 is a genuine G-series filter regulator: water separation, 40 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 series combines water and particulate filtration with pressure regulation in a single body: air passes a 40 um filter element, condensate collects in the polycarbonate bowl and is removed by the differential-pressure drain, while the low-pressure regulator sets the downstream pressure. This configuration is ordered with a 1/4 in NPT port, an embedded square gauge scaled in psi, and a mounting bracket included.
This is a genuine AirTAC part from the G-series air-treatment range, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in and PT, G or NPT thread options, rated to 1.0 MPa (145 psi) inlet and -5 to 70 C (non-freezing). As a low-pressure type it suits circuits running below standard regulator settings; the exact adjustment range for this variant is confirmed on request. Flow is published as curves rather than a single rating, so ask us to confirm sizing against your application.
| Model | GFR300-08-L-F2-T AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 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, psi scale |
| Reflux valve | Not fitted |
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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Mounted at the drop of a packaging machine's air supply, it strips water and debris from the shop air and holds a steady low-pressure setting for the machine's cylinders and grippers.
Feeding pneumatic clamps on a machining cell, the 40 um element protects the clamp cylinders from particulate while the low-pressure regulator keeps holding force within the fixture's limit.
On a laboratory or pilot-plant air drop, it conditions supply air for instruments and small pneumatic devices that need filtered air at a gentle, stable low pressure.
Choices you can decode: step up or down a size (200/300/400/600) to match the port and flow path your line needs; pick the drain - differential-pressure (this unit), automatic (A) or manual (M); choose the 40 um standard element or the 5 um W grade for finer filtration; select the gauge scale (MPa, psi or bar) and embedded square or optional external round gauge; order PT, G or NPT thread; and include or omit the bracket. All units run -5 to 70 C (non-freezing) at up to 1.0 MPa (145 psi) inlet. Flow is published as curves, not a single rated figure, so send us your application details and we will confirm sizing before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 as curves rather than a single rated figure, so there is no one rated-flow number we can quote. Send us your line pressure, downstream setting and expected air demand and we will confirm the sizing from the datasheet on request.
L marks the low-pressure type of regulator, intended for circuits that run below standard regulator settings. The exact adjustment range for this low-pressure variant is not published in the catalogue, so we confirm it on request before you order.
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.