The AirTAC GFR300-08T AirTAC Filter Regulator, NPT1/4, Manual Drain 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-08T is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 300-size body with a 1/4 in NPT port. This configuration has a manual drain bowl in PC (polycarbonate), a 40 um standard filter element, a fitted round pressure gauge reading in psi, and a standard regulator with an adjustment range of 0.05-0.9 MPa (7-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including automatic or differential-pressure drains, a 5 um filter element (code W), square or round gauges with MPa, psi or bar scales, G or NPT threads, and bracket variants. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request.
| Model | GFR300-08T AirTAC Filter Regulator, NPT1/4, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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) |
Clean, regulated air to a small pneumatic press or clamping fixture, with the operator setting working pressure on the psi gauge and bleeding the manual drain at shift checks.
Point-of-use air prep for conveyor diverters and packaging cylinders, filtering water and chips out of the shop air line before they reach the valves.
A regulated branch off a workshop air main feeding hand-held air tools and blow-off stations, with the 40 um element catching pipe-scale and condensate.
Start with the port step: this unit is 300 size with a 1/4 in NPT port; step up to 400 or 600 if the line needs a larger port and more flow capacity, or down to 200 for compact points of use. Drain choice matters: manual drain means someone bleeds the bowl, while automatic or differential-pressure drains suit unattended installations. Filter grade is 40 um standard here; specify the W option for 5 um where finer filtration is needed. Gauge scale is psi on this unit; MPa or bar scales are available, and the embedded square gauge is the standard alternative to this round gauge. Thread is NPT here; PT is the standard catalogue thread and G (BSPP) is also an order option. A mounting bracket is included.
Flow is published as curves, not a single rated figure, so ask us to confirm sizing against your application before ordering.
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 series as curves, not as a single rated number, so we do not quote a figure. Send us your application details and we will confirm the flow and datasheet figures for this 1/4 in NPT filter regulator on request.
Manual drain means the accumulated water is released by opening the drain by hand, so the bowl needs periodic attention. The same GFR300 body is available with an automatic drain (code A) or a differential-pressure drain (blank code) for installations you do not want to attend. This unit also carries a 40 um element, a round psi gauge, and an adjustment range of 0.05-0.9 MPa (7-130 psi).
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.